Instructables

Tweaking your Power inverter, get more bang for the buck

Step 3: Making the modification

C:\Documents and Settings\kouttron\Desktop\INVERTER2 BROKEN FET.jpg
C:\Documents and Settings\kouttron\Desktop\inverter3.jpg
Using a solder sucker / copper braid / a brillo pad (whatever works for you) remove the existing mosfets for the DC-DC converter. Try not to destroy the pads on the board!

carefully reinstall you new fet's. re-solder back in and reattach to any heatsink.

at this point (when everything is disassembled) its a good idea to give it a trial run.

1. make sure the surface your working on is free of conductive debris.
2. attempt to power up the inverter. (use a current limited source like a power supply/ wall wart if possible, not a car battery)
3. carefully check the output voltage (set meter to vac and check the output side)
4. if the output is 100VAC, try a simple 100W lamp.

5. note, i take no responsibility if you blow up you laptop/ house/ solar-system by following this instructable. prolly not a good idea to plug in an expensive laptop, but a blender / lamp / electric pencil sharpener / your 386 can take a beating and are less finicky to odd power supplies.
 
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wlucas13 years ago
Most inverters today have good mosfets already mounted, (1000W inverter uses 4x100A mosfets). Its usually the small transformers that take the beating. (Source: Experience). Anyone done a transformer hack? :+)