diy solar

diy solar

vevor 3kv : Smoked : anybody want TO BUY IT £50 ? OR REPAIR it for me ?

its useless to me ! Price reduced

vevor 3kv : Smoked : anybody want it ? repair it ?​

£40 plus postage if anybody wants to buy it in its current broken condition
 
pablo131 said:
maybe use it as the garage doorstop.
Click to expand...
Clearly, some people have the ability to fix these things


I have given "specialists" on this specialist forum the chance to help or
have cheap for repair but it seems no takers

so off to ebay

and if that does not work , landfill
 
SOLD : SOLD : SOLD : SOLD

hopefully, the images and discussion will be helpful to someone in the future
 
i have the 2000w model under another name i did just once try to pull 1500w via the mains the unit just tripped out so i know its only realy good for a constant 1000w if i ever needed to
 
Koincave said:
SOLD : SOLD : SOLD : SOLD

hopefully, the images and discussion will be helpful to someone in the future
Click to expand...
To be real helpfull the "someone" should know that replacing MOSFETS (all of them, not only the broken one if there are more connected in parallel) without replacing the drivers is not very usefull. The reason why is that partial breakdown occures on the other MOSFETS, you can see this only if you know to measure a MOSFET in dynamic mode (not by using a multimeter). Replacing a fast switching MOSFET connected in parallel with other three semi-damaged MOSFETS ( which are switching slowly) usually kills the new replaced one. Such heavily smoked MOSFET are usually kill it's driver too.
 
You realize the empty space next to the blown FET is where they would have installed one more FET that would have probably have given it another bit of capacity, or blown it quicker.

That sort of thing is common when the same board is used in multiple models of varying quality or capacity. Sometimes it is left empty because they find an error in design and they don't want to redo the batch. Or they use cheap caps verse more expensive ones. Had they used better quality caps they might have added that last MOSFET . This is how it can be infinitely relabeled with different specs or guarantees.

My point with the long winded story is the parts on the board in front of that spot or the others are probably the values you need. Y9u can probably steal them from there or just replace the new FET into that clean location. Might have to replace a couple of the other bits and bobs or remove the components in front of thebhrn spot if they are shorted.
 
You must log in or register to reply here.
Back
Top