Hi ppl

I replaced old panels with  new 555w Canadians now and need a new combiner box. MY idea is to use 20A circuit brakers instead the old fusers as MCB.s are more convenient to use . Can some one help me with the box design  please. I have two Kodak 4kw inverters, 12 X555 solar panels ( 8 facing east 4 facing west) and 5X3500 Pylontech batteries.
Any suggestion will be appreciated.

cheers

Edited April 1, 20251 yr by ibiza

thank you so much for your advice Haudevde, it is very valuable . I almost completed wiring

This is how it looks now

Edited April 1, 20251 yr by ibiza

Please use grommets or glands (or a piece of plastic sprague tubing) at your box entrances

good advice I'll do it,tnx

@ibiza ,

The photo you've posted gets a bit blurred when one zoom's in.

The following comes to mind:

1) The Isolators seem to be AC ones. You should not mix AC & DC.

2) To terminate cables, one should use ferrules.

3) Fuses. Please include those as well (or are they located in another DB)

4) Same with SPD's.

General: The DB seems too small to house a 6 into 2 PV system. - Unless you have the real protection elsewhere.

Here is what a typical 2 into 1 PV system could look like.

Edited April 4, 20251 yr by Sidewinder