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Q&A

About Power Inverters

Because some appliances have instant power or motor,then when use our power inverter must pay a attention for some points as follow:
1)it is better to use pure sine wave power inverter to connect with the TV,not modified power inverter

2)can not use our power inverter connect with the fluorescent.
There are two kinds of fluorescent,one is inductance type :when turnon switch,the light can on after one second or more and some also
with buzz ,this light has instant high voltage and it is more than 700v and even more than 1000v; another one is electronic type,it also
has instant current and can be more than 700 Ah

3)if want to run the machine like washing machine ,refrigerator or water pump which have a motor ,then need to use more than 15 times to 20
times power of them

4)you can not use our power inverter connect with the coffee grinder or kettle

Q:How much consumption of DC power 8000w inverter will draw, simple could I run it from 12v large battery or how many batteries I need to run it, also could I have this 8000w in a 60HZ frequency. How big motor of my compressor I can run, for example 1, 2, 3 horse power? and do I have to install power serge controller, could you supply one? Could I have it pure sine wave 60HZ 8000w constant power inverter?

A: For 8000w, the max power can run 600amp dc input, in our expereince, if you want use air compressor, we try 3.5hp is ok to use it, other or more power, we did not try before, this

item you are asking is modified inverter, if you want 8000w pure sine wave, this can be

made, price is USD700, but the best way is if you can let us know what kind of appliance you

want use, this is much better to match your demand

you need to connect your solar panel or wind turbine to this inverter, and make sure the output of your solar panel or wind turbine is between14-28v,then you can directly to connect it. if not, you can connect your solar panel or wind turbine to 24v battery bank, and then connect the battery to the inverter, and connect the output of the inverter to your home plug, this is necessary if you want it to work.

1.how to stall?

a.put femal to the inverter first, make sure it is connected

b.then put male plug to the home power

2.how to take away?

a.take off the male plug from the home power first

b.then take away the female plug

1.power tools circular saws,drills,grinders,sanders,buffers,weed and hedge trimmers,air compressor

2.office equipment computer,printers,monitors,facsimile machine,scanner

3.kitchen appliance mirowave ovens,refrigerators and freezers,coffee makers,blenders,ice markers,toasters.

4.household items vacuum cleaners,fans,fluorescent and incandescent lights,sewing machines.

5. home entertainment electronics tv, vcr,video games,stereos,musical instruments,satellite equipment.

Why you should buy our Power Inverter ? 1. Our PCB Board is manufactured by machines, not by hand ! This is extraordinary clean and it gives no cable tangle ! 2. Our Material is „First Hand Material“ ! We don t use “Second Hand Material“ like many other supplier ! 3. Important Delivery Parts are manufactured in USA, Japan and Germany, 4. The Power Output is very constant. When using Strong Machines the IC Program recoginizes this and provides at the beginning a Higher Power which adapded later !

What is the difference between modified sine wave and pure sine wave? Modified Sine Wave If your equipment can accept some voltage fluctuation, consider a modified sine wave inverter. These inverters provide mobile power at a more affordable price and come in a full range of sizes. Sine Wave If you want to run your equipment exactly to the manufacturer’s specifications, choose a true sine wave inverter. With true sine wave, motor loads start easier and run cooler. Some equipment only operate properly with true sine wave power—laser printers, variable speed motors and digital clocks. Waveform is an important consideration when choosing an inverter. sine wave inverters provide premium power that is identical to or even better than power supplied by your utility company. Modified sine wave inverters provide good performance at a great value.

About island protection

power jack grid tie inverter has a green light, when the charge fucntion is normal, then this light will turn on, but if there are not dc sources(like in the night, no sun shine or raining day), the red led light will turn on, the inverter will stop to work, in this moment, the inverter will close the door, the home grid power will not back to inverter.

what is the AC SOURCE?

AC source,we have a special design for AC SOURCE, when you use solar or wind to our grid tie, in this moment, you can directly have ac power to put your appliance at the same time, but you need to connect the home grid power first

what is difference of power jack grid tie inverter?

traditional grid tie inverter is the solar panel are connect in series, so if one solar panel did not work or bad efficiency, then the whole system will be effects, but power jack grid tie inverter, you can use every inverter in parallel, in this moment, each inverter has it's own MPPT, can make every solar panel got the max power.

why use power jack grid tie inverter? when you use solar panel through grid tie inverter, your home power meter will reduce the speed(if you are using other electric appliances), or your home power meter will backward(if you are not use any appliances)

What is the difference between a 12-Volt and 24-Volt Power Inverter?

The difference is the type of battery you want to run your power inverter on. Most vehicles run off a 12 volt battery. The 24 volt are generally used in large trucks or industrial motors.

About grid tie inverter

Power Jack doing the grid tie inverters about 5years, every year has new version to improve the reliability.

Power Jack maybe not the best provider for grid tie inverter, but they have good marketing experiences,

they know where is the problem for the customer have.

Now the major problem has 2points:

A. first set up, sometimes spike voltage come into inverter, or not reliable home voltage cause the inverter dead.

B for long time use, sunddly has high spike come in or un reliable voltage up-down.


So whats the different between the New version for 2013, 5.0 600w grid tie inverter with the old version ?

1.Two step Spark voltage protection double AC High voltage absorption device

The first one consisted of gas discharge tube and resistor , can obsorb the instantaneous high-voltage which produced by inside island effects , can protect the inside component . The secone one consisted of mosfets , resistors, and internal detection circuit , it also will obsorb the instantaneous high-voltage caused by inside island effects

When set up or unresonable remove the inverter, there are some voltage still stay in the inverter, in this moment, inside voltage will go to 700-800v, the high voltage will kill the mosfet & some components. The first protection will assimilate the high voltage down to 300-400v, if the inside voltage still high, the second protection will release the rest .high voltage go to the ground. All the protection respon time only mini 2-3 seconds.

This 2 new design, already make 3months reliable testing, full power testing, there is nothing happened for the inverter.

2. Thunder protection : New version have thunder protection , there are two piezoresistors can release the instantaneous high-voltage which produced by thunder through ground wire into ground .

3. The old version adopted SMD components in the back of PCB board , they may drop or damage easy during carriage . And the new version change to DIP plug-in board ,would not happened the situation as the old version

4. Capacitor : old version adopted 2 general big capacitors , new version adopt 6 pcs small high frequence and low impedance capacitors which from Taiwan ,Because they closer to the transformer , can get smaller calorific values , the filtering effect would be better ,and longer lifetime

5. .High frequence rectifier tube : old version adopted 10 pcs rectifier tubes , new version only 5 pcs rectifier tubes ,so that can reduce 40% calorific values than old version

6. Filter capacitor: old version used 2 pcs small filter capacitors . New version used a big filter capacitor instead of those 2 small filter capacitors , so can reduce 40% calorific values than old version ,and can get higher effiency .

. Effiency for New version input and output

When DC input is 300w , AC output effiency can reach 92%

When DC input is 400w , AC output effiency can reach 89%

When DC input is 500w , AC output effiency can reach 87%

When DC input is 600w , AC output effiency can reach 86%

8. Cooling fan : the fan dimension for old version is 45mm *20mm , the new version is 60mm*20mm, much biger than old version , and power is 4 times higher than old version , and cooling effiency is higher .

The fan could not operate below 400w .

The fan with intermittent operation between 400w to 500w

The fan operate when reach 500w-600w , and inverter keep working .

9. LED light , old version adopt 4 pcs LED light , new version adopt a two-color light

10. Signal manage chip : the old version adopt general signal manage chip , and new version adopt 2 signal manage chip from Microchip

11. New version adopt import manage power IC CPU , Microchip from USA

12. New version have one more single control board , it have isolation effect and can replace easy .

Your wind turbine is 24v ,then we would suggest you buy the grd tie inverter is 28v-52v .

Because your wind turbine 's voltage can run about 50v ,then the 28v-52v grid tie inverter is good for your wind turbine.

The wind turbine you must connect with the wind controller first then connect with the grid tie inverter.

Maybe you can use wind turbine connect with the grid tie inverter with 3 phase .It not need connect with the controller .

The wind turbine you must connect with the wind controller first then connect with the grid tie inverter.

Maybe you can use wind turbine connect with the grid tie inverter with 3 phase .It not need connect with the controller .

Our grid tie inverter can use in parallel.

For example, you can use 4 pcs 300w grid tie inverter in parallel Instead of 1200w grid tie inverter.

You directly use solar panel connect with our grid tie inverter ,then the grid tie inverter 's plug insert into your home plug.

It is so easy to you and you needn't use the controller .

I would suggest you use at least 1000w solar panel to connect with the 1200w grid tie inverter .

When your grid tie is 300w ,then you can use 100w soalr panel to use .

Q:Please let me know what I have to use between the generator I have and your inverter in order to make it work. A: you need to connect a 36v or 48v wind contoller between your wind generator and your grid tie inverter, otherwise the grid tie inverter will easily burned to this inverter, and then connect the output of the inverter to your home plug, this is necessary if you want it to work.tks.

About pure sine wave power inverter



Our pure sine wave inverter 's plug is apply to EU,AU,UK,USA. It is Universal socket.

QDoes this unit have to be grounded? Does it have any interference with television or radio?

Aour products have ground terminal you can choose connect it or not,and the item itself with a choke that it can against interference ,but if your television or radio haven't the equipment against interterence it will be affected.

Q:I tried a 320w modified sine power inverter, it looks like working fine. But battery volt drop down significantly. 13.2V while engine running, dropped to 12.8V. if leadlights, interior lights on and radio on, dropped down to 11.9V. If I install this to my car, will that cause a problem? My car is a ford 99 explorer, SUV, old..

A: ya, need turn on engine, the working range is 11v to 15v

About Service

1500W-PSW Repair Guideline

If failure under proper use, please follow the following methods to troubleshoot and do simple maintenance. (Need a multimeter, 30V/5A power supply)

1. After receive the inverter, please check carefully, if the apperance is deformated, or terminal(s) is damaged, please solve this timely, in case this cause the short circuit of the internal component, and the burnt of the components after the access to power.

2. Open the inverter, check if the slot and the cable on the PCB is loose or fall off, and check if the connections on the front and back board is loose or fall off, if yes, please connect correctly and firmly inserted or replaced.

3. After connected, adjust to the normal voltage, turn on the inverter and check if there has output, and the situation of the led lights and the buzzer beeps, specifically refer to the six normal situations inThe situation of the led lights and the buzzer beeps of PSW inverterfor exclusion. Normally turn on, the no-load current is: 12V system, 110V for 0.25-0.35A, 220V for 0.50-0.70A; 24V system, 110V for 0.15-0.25A, 220V for 0.30-0.40A.

4. Check whether the DC fuse(12V system is 40A/32V; 24V system is 20A/32V) is blown, if yes, then need to check the 8pcs DC mosfets(12V system is RU4099; 24V system is 05CN10 or RU190N08), and the corresponding 1/8W, 10 ohm resistor, and the suppression diode(12V system is P6KE39A; 24V system is P6KE75A) is broken; then check the 8pcs rectifier diode on the high voltage rectifier( 110V for SF54; 220V for HER308 or SF38) is broken down.

5. If DC fuse is not blown, then need to check whether the AC glass fuse(110V for 12A/250V; 220V for 6.3A/250V) is blown, if yes, then need to check whether the 4pcs AC mosfets(110V for IRFP4232; 220V for G40N60), their corresponding 1/4W, 2.2 ohm resistor, and diode 1N4148 is burnt; check the two IC(IR2110 & IR2113) on C1 board, this IC may not have testing tool, just directly replace it, in case the burnt of the AC mosfets again.

Turn on the inverter and test again after replace all the fault parts.

6. If both DC and AC fuse are good, and all the mosfets and their corresponding resistors and diodes are all normal, then need to do the following tests for exclusion:

Turn on the inverter and test if there has AC output, if not, then need to disconnect the AC fuse, connect the power on again and test whether the DC high voltage is normal(110V for about 180V; 220V for about 380V), as shown in Figure 2, Figure 3, Figure 4, if the DC high voltage is normal, then the problem is on the AC side; if the DC high voltage is abnormal, then the problem is on the DC side.

If the problem is on the DC side:

At first, need to test the 8pcs DC mosfets(12V system is RU4099; 24V system is 05CN10 or RU190N08), and the corresponding 1/8W, 10 ohm resistor, and the suppression diode(12V system is P6KE39A; 24V system is P6KE75A) is broken; then check the 8pcs rectifier diode on the high voltage rectifier( 110V for SF54; 220V for HER308 or SF38) is broken down.

Second, check whether the two DC power groups 13V and 18V on the power supply board are normal, because the board is welded up, not good to test, so need to find the corresponding test points on the board to do the test, as shown in Figure 5, Figure 6. If any of these two groups do not power normally, then need to remove the DC power supply board to do the test, because if there has problem on the main board and C1, C2 board, the DC power supply board will not supply voltage normally, as shown in Figure 7.

Testing method: access 12v power supply to leg 2 and leg 3( negative to leg 2, positive to leg 3), the current is 0.02A, test the voltage between leg 1 and leg 2 is 13V, and the voltage between leg 4 and leg 5 is 18V( the voltage maybe 2V more if removed to test). If the voltage is normal, then the DC power supply board is normal.

If there has problem on C1 board, then check the IR2110 or IR2113, as shown Figure 8:

If there has problem on C2 board, normally is on the above SCM SN8P2711A, SS8050 and SS8550, as shown in Figure 9:

If the problem is on the DC side:

need to check whether the 4pcs AC mosfets(110V for IRFP4232; 220V for G40N60), their corresponding 1/4W, 2.2 ohm resistor, and diode 1N4148 is burnt; check the two IC(IR2110 & IR2113) on C1 board, this IC may not have testing tool, just directly replace it, in case the burnt of the AC mosfets again.

PS. when test, need to adjust the multimeter to the right position, they are: diode file, 200V DC file, 1000V DC file, 750V AC file, 200Ω resistance file, the position is shown in Figure 10.

Simple test on mosfet: adjust the multimeter to diode file, namely the buzzer file, use the two pens to test the three legs(G,D,S) seperately, total three groups, if any group shows 0 or near 0, then this mosfet is broken; if all three groups do not show 0 or not near 0, then this mosfet is normal. adjust the multimeter to diode file, use the red pen to keep touching leg D, and use the black pen to touch the leg G first, then to the leg S, the resistance will show very large or always 1, then the black pen only touch leg S, the red pen touch the leg G and leg D at the same time, the resistance will be significantly smaller.(It is more reliable if removed to test on method)

Normal test of mosfet: as shown in Figure 12, Figure 13, Figure 14:

Simple test on diode:

adjust the multimeter to diode file, namely the buzzer file, if test it on the inverter the reading shows 0, then it maybe broken, need to remove it or remove one leg from the board and do the test, use the red pen to touch A, the black pen to touch C, the reading will be 300-600; then use the red pen to touch C, the black pen to touch A, the reading will be infinite or 1, this means the diode is good, if not, then it is bad.

Testing method of resistor:

The broken resostor usually on 2.2Ω and 10Ω, need to adjust the multimeter to 200Ω file, test the corresponding resistor, R1,R2,R3,R4,R1-1,R1-2,R1-3,R1-4 is 10Ω, R18,R19,R20, R26is 2.2Ω, as shown in Figure 20, Figure 21

http://www.youtube.com/watch?v=vvcAhLJhUsM

http://www.youtube.com/watch?v=A4WTpmAYdf4(Power Jack 1200w grid tie inverter-repair-1)

http://www.youtube.com/watch?v=m3Fd2XlIAm8(Power Jack 1200w grid tie inverter-repair-2 )

http://www.youtube.com/watch?v=SMDPXH3RmG0(Power Jack 600w grid tie inverter-repair-1)

http://www.youtube.com/watch?v=pJV1TANXTqk(Power Jack 600w grid tie inverter-repair-2)

http://www.youtube.com/watch?v=qFB3BR4qnwY(Power Jack 600w grid tie inverter-repair-3 )

http://www.youtube.com/watch?v=5h8AesDhhEU(Power Jack 600w grid tie inverter-repair-4 )

http://www.youtube.com/watch?v=C3tq2rLYGYQ(how to repair for 300w power jack grid tie inverter )

http://www.youtube.com/watch?v=kooDT0XlQC4 (Power Jack 300w grid tie inverter-repair-1)

http://www.youtube.com/watch?v=OdxLJv0rPEk(Power Jack 300w grid tie inverter-repair-2)

http://www.youtube.com/watch?v=-v2RvuCaRuc(Power Jack 300w grid tie inverter-repair-3 )

Tools : Multimeter, Sharp-nose pliers, electric soldering iron(60W) Spare parts : 1. MOSFET 46N20(posit in Q1,Q2,Q6,Q7 Q1-1,Q2-1,Q6-1,Q7-1) 2.115v MOSFET 80N50 (posit in Q8,Q9,Q10,Q11) (if you are buying 110v), AC fuse (F1): 12A/250v, 3. 230v MOSFET 60N100 (posit in Q8,Q9,Q10,Q11) (if you are buying 220v), AC fuse (F1): 6A/250v 5. DC fuse (F2,F3): 20A, Light judgement : 1. The red and green lights both have no response(see Procedure 1); 2. The red light on, green lights off and no output(see Procedure 2); .

First step: Take out the PCB, identify the position of the Mosfet (Q1,Q2,Q6,Q7, Q1-1,Q2-1,Q6-1,Q7-1,Q8,Q9,Q10,Q11), DC fuse ( F2 ,F3) (shown as photo 1-1).

Photo 1-1

Second step: Adjust the multimeter to the side of the beeper. (shown as photo1-2).

Photo 1-2

Procedure 1:Use the red pen of the multimeter to touch the Mosfet (posit in Q1,Q2,Q6,Q7, Q1-1,Q2-1,Q6-1,Q7-1) S side, black pen of the multimeter to touch the G side (shown as photo 1-6). If the multimeter reads : .(500- 630), it stands for normal. If not, please take away the burnt mosfet by electric soldering iron(60W)then replace it with MOS46N30.

Photo1-6

Take away the DC fuse with the Sharp-nose pliers (shown as photo 1-9). Then use the red pen and black pen contact the the DC fuse on both side (shown as photo1-10). If the multimeter reads .000, it stands for normal (shown as photo 1-11). If the multimeter reads 1. or more ,it means that the fuse was burnt (photo 1-12). Please replace a new DC fuse.

Photo 1-9 Photo 1-10

Photo 1-11 Photo1-12

Also detect the corresponding resistor (shown as photo 1-13,1-14) , if the Q1 is faulty, test the corresponding resistor R4, Q2 to R5,Q6 to Q23, Q7 to R22, Q1-1 to R4-1, Q2-1 to R5-1,Q6-1 to Q23-1, Q7-1 to R22-1. If the multimeter reads 2, it is normal. If reads more, the resistor is faulty.

Photo1-13

Photo 1-14

Procedure 2: Use the red pen of the multimeter to contact the Mosfet (Q8,Q9,Q10,Q11) S side, black pen of the multimeter to contact G side (shown as photo 2-1). If the multimeter reads (680-730), it stands for normal. If not, please take away Mosfet (the 115V MOS is80N25, 230V MOS is 60N100 ) by electric soldering iron(60W)then replace it. The AC fuse(shown as photo 2-2) must be burned, replace it too.

Photo 2-1

Photo 2-2

Tools

Multimeter, Sharp-nose pliers, electric soldering iron60W

Spare parts :

1. MOSFET 38N20 (posit in Q1,Q2,Q6,Q7),

2.115v MOSFET 18N50 (posit in Q8,Q9,Q10,Q11) (if you are buying 110v),

3. 230v MOSFET 14NK60 (posit in Q8,Q9,Q10,Q11) (if you are buying 220v),

4. AC fuse (F1): 5A,250v,

5. DC fuse (F2): 20A,

6. Resistor: encapsulation 0805, 2 ohm (4 pcs total);

Light judgement :

1. The red and green lights both have no response;

2. The red light on, green lights off and no output .

First step: Take out the PCB, identify the position of the Mosfet (Q1,Q2,Q6,Q7,Q8,Q9,Q10,Q11 ,8 pcs total), DC fuse ( F2 ), and AC fuse ( F1 ). (shown as photo 1-1).

Photo 1-1

Second step: Adjust the multimeter to the side of the beeper.

(shown as photo1-2).

Photo 1-2

Procedure 1Use the red pen of the multimeter to touch the Mosfet (posit in Q1,Q2,Q6,Q7) S side, black pen of the multimeter to touch the G side (shown as photo 1-3). If the multimeter reads : .(500- 630), it stands for normal shown as photo 1-4. If not, please take away the mosfet (38N20) by electric soldering iron60Wthen replace a new one.

Photo 1-3 Photo 1-4

Take away the DC fuse with the Sharp-nose pliers (shown as photo 1-5). Then use the red pen and black pen contact the the DC fuse on both side (shown as photo1-6). If the multimeter reads .000, it stands for normal (shown as photo 1-7). If the multimeter reads 1. or more ,it is mean that the fuse was broken (photo 1-8). Please replace a new DC fuse.

Photo 1-5 Photo 1-6

Photo 1-7 Photo1-8

Also detect the corresponding resistor (shown as photo 1-9) , if the Q1 is faulty, test the corresponding resistor R4, Q6 to R23, Q7 to R22. If the multimeter reads 2, it is normal. If not, the resistor is faulty.

Photo 1-9

Procedure 2: Use the red pen of the multimeter to contact the Mosfet (Q8,Q9,Q10,Q11) S side, black pen of the multimeter to contact G side (shown as photo 2-1). If the multimeter reads (680-730), it stands for normalshown as photo 2-2. If not, please take away Mosfet (the 115V MOS is18N50, 230V MOS is 14NK60 ) by electric soldering iron60Wthen replace it. The AC fuse must be burned, replace it too.

Photo 2-1 Photo 2-2

Tools

Multimeter, Sharp-nose pliers, electric soldering iron60W

Spare parts :

1. MOSFET 75NF75 (posit in Q1,Q2,Q6,Q7);

2. MOSFET12NM50 (posit in Q8,Q9,Q10,Q11);

3. Resistor: encapsulation 0805, 2 ohm (4 pcs total);

4. AC fuse (F1): 5A,250v;

5. DC fuse (F2): 20A;

Light judgement :

1. The red and green lights both have no response;

2. The red light on, green lights off and no output .

First Step: Take out the PCB, try to identify the position of the diode (8 pcs total), Mosfet (8 pcs total), DC fuse ( F2 ), AC fuse ( F1 ). ( shown as photo 1-1).

Photo1-1

Second step: Adjust the multimeter to the side of the beeper.

(shown as photo1-2).

Photo 1-2

Procedure 1Use the red pen of the multimeter to contact the Mosfet 75NF75 (Q1,Q2,Q6,Q7) S side, black pen of the multimeter to contact the G side (shown as photo 1-3). If the multimeter reads between : .500- .630, it stands for normalshown as photo 1-4. If not, please take away the mosfet by electric soldering iron60Wand replace with a mosfet (75NF75).

Photo 1-3 Photo 1-4

Grips and takes out the DC fuse with the Sharp-nose pliers (shown as photo 1-5). Then, use the red and black pen contact the DC fuse on both side (shown as photo1-6). If the multimeter meter reads .000, it stands for normal (shown as photo 1-7). If the multimeter meter reads 1 or more, it indicates that the fuse was broken (shown as photo 1-8). It should be replaced with a new DC fuse.

Photo 1-5 Photo 1-6

Photo 1-7 Photo 1-8

Also, detect the corresponding resistor (shown as photo 1-9) , if the Q1 is faulty, detect the corresponding resistor R4, Q6 to R23, Q7 to R22. If the multimeter meter reads 2, it stands for normal , if not, the resistor is faulty.

Photo 1-9

Procedure 2: Identify the position (Q8,Q9,Q10,Q11) on PCB board, Use the red pen of the multimeter to touch the Mosfet 12NM50 (Q8,Q9,Q10,Q11) S side, black pen of the multimeter to touch G side (shown as photo 2-1). If the multimeter meter reads between (690-730), it stands for normal shown as photo 2-2, if not, take away the faulty Mosfet by electric soldering iron60Wand replace with a new Mosfet 12NM50. The AC fuse must be burned also, replace it too.

Photo 2-1 Photo 2-2

If you purchase inverter in our website, we offen ship the goods within 3 days. after we shipped it, we will inform you the tracking number of Fedex or DHL by email. then you can check it by fedex website( http://fedex.com/us/) or DHL website(www.dhl.com)

what about delivery time ?

The estimated delivery time is based on the seller's handling time, the shipping service selected, and the payment method selected. Sellers are not responsible for shipping service transit times. Transit times may vary, particularly during peak periods.

How long is the warranty? What is the proceedure if inverter fails whilst under warranty?

1.up to 6 months :customer must pay the sending back charge, no repair charge.
2.6 months to 1 year :customer must pay double shipping charge , free repair .
3.if the good was damaged by customer, or incorrect usig,will not including warranty.
4.If the inverter was broken ,we will check what the problem first, then decide how to deal with.

About after sales service

Q:hello , when i can get the item after i paid ?

A: we will sent by FEDEX or DHL , usually may beed about 4-7 days to your country , but not including the customs clear time please note: buyer is responsible for the import tax if happened by local customs !

Defective modified power inverter has following situations:

One. Red led light, buzzer alarm

1. Undervoltage protection (low voltage protection) over-voltage protection: the operating range of 12V system is 11V-16V, and 24V system is 22V-30V. When the battery voltage is below or above this range, the inverter will not work properly.

2. Temperature protection: the inverter work for a period of time, the temperature of the whole inverter will slowly rise as the temperature rises, the fan of the inverter will first starts, when the temperature of the mosfet rise to 90 degrees, the inverter will be alarm to protect, temperature protection.

3. Overload protection: when the power of the appliance or surge power(any appliance with motor inside has surge power) over the overlaod range of the inverter, the red led will turn on, alarm to protect.

4. Thermistor off: if the thermistor is damaged, the inverter will be red light, and alarm to protect, so when this situation happens, need to use the multimeter and adjust it to DC200V position, and then test the DC input voltage to see if it is in the working range. Also, need to know what is the appliance and the watts of this appliance, with motor or not, what is the working time.

Two. Green light on, abnormal output voltage

AC output voltage, as to 220v item, only shows 140v, as to 110v item, only shows 70v, there are two situations:

1. only one AC fuse got burnt, the corresponding mosfet maybe also got burnt.

2. The waveform of the AC side drive maybe only shows half-waveform, due to the damaged component on the circuit board or the circuit breaker. If the voltage is abnormal, need to check if the AC fuse got burnt, adjust the multimeter to diode position, and then test the mosfet(the black pen touches the second leg, and the red pen touched the third leg), the normal reading is about 380, if the reading is very small or very large, then the mosfet is damaged; at this time, need to test the corresponding resistor, the right reading is 220 ohm.

Three. Green light on, normal voltage when no-load, very low voltage when load. There are two situations:

1. DC fuse maybe got burnt;

2. The PWM signal output shows abnormal on the controll board.

3. Testing method: open the inverter, adjust the multimeter to diode position and then test the DC fuse, if it shows 0, then it is good; if it shows 1, then it is bad, at this time, need to test the corresponding mosfet(the black pen touches the second leg, and the red pen touched the third leg), the normal reading is about 420, if the reading is very small or very large, then the mosfet is damaged; at this time, need to test the corresponding resistor, the right reading is 10 ohm.

Four. No response on the led light, no response when turn on the inverter.

Testing method: open the inverter, check inside to see of there has any loosing connections or any burnt parts; if not, then adjust the multimeter to diode position, and then test the switch to see if it works when it switches to “ON”; then test the 1st leg and the 20th leg of the CPU on the big board to see it shows 5V.

The following six situations are normal:

1. turn on: when turn on the inverter, the buzzer will beep once, red led light on for a few second, then green light keeps on.

2. low input voltage alarm: when the input voltage is lower than 11.0V±0.5V, the buzzer will beep twice, at this time, the green light keeps on like when turn it on, the output is normal, the inverer can work.

3. low input voltage protection: when the input voltage is lower than 11.0V±0.5V, the buzzer will beep three times, at this time, the inverter off AC output and the red light on.

4. over input voltage protection: when the input voltage is over than 11.0V±0.5V, the buzzer will beep four times, at this time, the inverter off AC output and the red light on.

5. temperature protection: when the temperature of the inverter is over 45±5, the cooling fan will run; when the temperature is over 80±5, the buzzer will beep five times. at this time, the inverter off AC output and the red light on, the fan will keep running.

6. over load protection: when the inverter is with load, the buzzer will keep beep for about 10times constantly, the green light is still on, when the beeps stop, the red light will be on, about after 8seconds the inverter will restart again. Sometimes both the red and green light on, low input voltage, but without alarm.

1. what's the last time of appliance do you use, and how many watts of your appliance? Before use this appliance, what appliance and the watts have you run with this inverter? 2. when turn the inverter on, what led light can you see? a. green light b. red light c. no response for led light 3. Did you connect the inverter to a battery, is it 12v or 24v? what's the capability of the battery(AMP)? 4. Did you use a battery cable? what’s the size for battery cable(AWG)? 5. Whether the inverter can run other small power machine? 6. do you have some experience for electricity? 7. Whether you can take some photos of the inside of the inverter for our ref? If so, pls attach them, tks.

1. do you connect it to solar panel or wind turbine? what's the no load voltage and load voltage of it if it’s solar panel?

2. how many pcs and the watts? how do you connect them?

3. what's the input voltage for the grid tie inverter, namely the output for solar panel/wind turbine?

4. how is the situation of the led light?

a. both green lights and red light have no response

b. red light on, but green lights off

c. red light on for 1-3 seconds, then off, at the same time, the green lights on one by one

5. when use the inverter, AC output must be connect to the home power, did you use it in this way?

6. if convenient, pls attach some photo of the inside of the inverter for our ref. tks.

7. do you have experience on electronic?

Q: Its been a year and i finally got my solar panels built to connect to the 1200w solar/wind grid tie power inverter DC28-55v to AC i purchased from you last year. my 4 panels produce about 100W (12.5vx8a) i have them connected in series and volmeter shows 50v@6a (300W) plugged into the pswgt1200. my killawat is only showing 140W output. I opened the case and was surprised to find 2 x PSWGT-600W REV 2.0 boards inside. on the website http://www.12vgridtiepowerinverters.com/ i checked the fuses (ac and dc) and they are ok. when i checked Q8-Q11 (19N60E) on each board, on ranged from 815-826 and the other ranged from 810-839 which are above the 680-730 the site states as normal. when i checked Q1,Q2,Q6,Q7 (FB38N200) on both boards, they were all between 655-658 which is above the 500-630 the site states as normal. Could this be the cause of the low output? what can we do to get this corrected? Thanks

A: Tks for feedback! Ya a lot of customer has same questions as you, here is our explained: [1. usually when solar panel mentioned it's 100w, as per our experience only have 60% ouput, if your buying price not good enough, they usually give you bad efficiency. 2. let us tell you a simple way, usually the inverter is 85% efficiency, so if 100w input, then output will have 85watt, the 15watt lost, so according your 300w load watt still have 300watt, then 300w x 85%=255watt output, then 255watt-140watt=115watt stay at inverter, if like this, the inverter ac mos-fet will burned, because the balance power no way to go, just find the mos-fet to kill it. 3. let's show you how to prove what we say is correct, here is our web site link, you can know how to measure, http://www.12vgridtiepowerinverters.com/FAQ(1. how to measure amp of input from solar), for this way, you can test the load AMP, it means the real amp coming, accord your message 300watt(50v, 6a), that's no load, but loading is real power, for ac side, you dont need to connect it.because watt=volt x amp ,now you know the real amp, still need to measure the load voltage, at this time, you need switch your meter to dc voltage to measure, for the ac side you need connect it, in this moment, it's load voltage. when you get the voltage & amp, then you will know how much the input watt.From above, you can ask your solar supplier, when you test the real output, if 100watt, what's the real output, they may tell you, this may use test light to get the real power, but you just ask them when in the big sun, what's the output watt can get, then you will know what's going on, it means you can complained with your solar suppier, not us. We are waiting for your confirmation after you get the testing, tks.

Q: I received in error a different power inverter with different specification to the one above. I have received one that is 87% efficient and 65 cm long & made in China not Taiwan as advertised. Please send the correct item and I shall return this one to you. Kind regards

A: Sorry for the wrong product, here is our solutions: 1. as this is the new type, so the manual did not up-date still 87%. 2. for the 65cm long, the old type is 41cm, but it's only 87%, that's why we put ore transformer inside,6pcs, old type only 42pcs) that's why 65cm long, this is wrong description, we will up-date it. 3. as the description said, the transformer come from taiwan, not whole inverter made in taiwan. So to match the best satisfied for our customer we have 2 solutions as follows: 1. We would like to back USD20 for you if you can accept this machine. 2. pls help us to send the good to our another u.k place, we will make refund plus the u.k shipping cost. From above, pls confirm your opinion, tks & sorry for the inconvenience cause.

Q: Regarding 3500w grid inverter, i am only putting 200w into the inverter and has been working ok until it blew the fuses so i checked the boards and found on one board the large 35N60C mosfets had failed so i removed the faulty board and used the inverter with one board as i was only putting in 200w and weeks later the its mosfets also failed can you please tell me why the mosfets fail and could you please send me some repacements as it is still within the warranty period.

A: Pls inform if you have electric experience, if so, pls visit our web site at www.12vgridtiepowerinverters.com If not, then pls send back the pcb board back for fix, after fixing it, will offer a whole set including casing, also pls inform your ebay item no., will check it for really miss the pcb board then we will put 3pcs 1200w grid tie inside.

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