Company Codes

8 comments started 2026-04-17 last 2026-04-17
Forums/Meta
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#1 Rubikcube

I doubt many know this, but register 33 hold a Company Code. Why does the inverter need a company code? I have no idea.

Last year I was curious what it was for, so I changed it. To begin, it was set to 7. I changed it to 10, then 9 , then 8, then 7, ... and so on all the way down to 1.

This is what appeared in the log

Afterwards, I put it back to 7 just in case.

Sharing for info only just in case anyone finds it useful.

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#3 Robgy

hoggy a fascinating story, makes me wonder what I actually bought!

#4 hoggy

@Rubikcube not sure what your inverters are all listed as? Some of mine are 7 but some of them just report 0 with no real rhyme or reason.

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#5 wrighar

hoggy

Now things like this I've been trying to find for years!

Also loving this use case:

#6 hoggy

wrighar that chart is just PV efficiency not to/from battery but it's better than what you get from the Giv datasheets

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#7 neomancer

hoggy HA, this is really interesting.

Now, if only we could get a copy of the OEM firmware... that would be really spicy.

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#8 wrighar

hoggy

My 8 panel String is pretty much sweet spot,
My 6 panel string could do with 2 more panels :-)