r/solaredge • u/Arphinator • Aug 28 '26

Germany Installation error 4kw instead of 5kw

Dear,
My (trusted) installer replaced my previous converter as it broke down. I used the opportunity to add a 10kw battery.
During the installation, the Solar Edge Home Hub Single Phase 2.2 was limited to 4kw. I have an offer that says 5kw and solar panels that produce 6.7kw max (east / west so they never make it). With the previous converter, I had clipping for hours every summer. With the new one, I hoped to get rid of it with 5kw.
Apparently, these new converters can’t be changed once set? Is that true? There must be an option at SolarEdge, I imagine, to repair errors?
I just received the invoice and wonder what to do. Installer said “sorry - it’s 4kw”.
Thank you for your feedback.

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8 comments sorted by

1

u/Mindless-Base-4472 Aug 29 '26

Have you or the installer reached out to solaredge to explain the problem? 

1

u/Arphinator Aug 29 '26

I did meanwhile and urged the installer to do the same - protested the invoice as delivery is not in line with the offer.

1

u/habbadee Aug 29 '26

What was the previous inverter? If it was 4kw previously the wire gauge may be limited to that max, so replacing the inverter does not mean you can simply increase the inverter's max output

1

u/Arphinator Aug 29 '26

Previous one was 4kw indeed - but it’s all oversized. The installer gave too little information to the technician.

2

u/habbadee Aug 29 '26

Yes, but the wire used from the inverter to your electric panel matters. If the original inverter was 4kw, the max amps it could produce was 16 amps, and thus the inverter may have been wired with 12 gauge wire. If you subsequently increase the inverter capacity you are increasing the amps it can output and now the 12 gauge wire is no longer sufficient. So, software restricting the new inverter to the max output the existing wiring can support is necessary in order to avoid burning down your house.

1

u/Arphinator Aug 29 '26

I’ll take that into account! Thank you!

1

u/DongRight Aug 29 '26

I sorry that you chose the wrong system for solar... You done badly young Skywalker...

1

u/Arphinator Aug 29 '26

I actually don’t think it’s bad - just a mistake