Hopefully? Another 48vdc-240vac Toriod Inverter build.

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Murphy's friend Guru Joined: 04/10/2019 Location: Australia Posts: 671	Posted: 07:28am 31 Dec 2022         wiseguy said   Murphy duplicated the Warp inverse opto FET drive part also and has been trying to kill FETs ever since, but I believe a solution to this has eluded him to date. You wish, Mr. Wiseguy , but I have long since got my converted to opto isolated drive inverters (4 off) running perfectly . The big, dual stack, 6KW inverter is on standby connection while my house is powered from my warp inverter. I can be switched over in 30 seconds. The reason for this is that I use both, MPPT charging and GTI back charging to fill up my battery bank. Now, both inverters work with that but the 6KW dual stack growls fearfully while 2 or so KW of power is being pushed backward through it. The warpinverter just hums a little louder in the same scenario, that is why it runs the house since I have a choice . One rule of thumb for prospective inverter (non warp) builders that I found is that a full bridge of 4 HY4008's can handle 1KW on a good heat sink. My big inverter has 4x4 (16 total) HY4008's, so 4KW but a lot more intermittently. The warpinverter uses 4 full bridges, 16 + 12 + 8 + 4 = 40 HY4008's to compare, it's a lot more expensive build . My early inverters used TO220 mosfets, up to 6 in parallel but that many proved messy when they went chain reaction 'bang'. So I suggest 4 x 4 in parallel for Mike's build. Mike, you might re consider your 'ozinverter power board' when I tell you that half bridge PCB's use the Aerosherp heat sinks much more efficiently and one can build them with a non live heatsink. You *do* have to be able to accurately drill & tap thru & blind holes in the heat sink to build an inverter that way.