Azeem

Thanks. The way the installer has done it on original 10+9 setup has become 12(10x540 and 2x550) + 11(10x540 and 1x550).

Thanks and it makes sense. I have a question though about voltage difference between the two strings, is it proportionate with respect...

I have 540w Canadian solar panels isntalled on roof connected to GoodWe 10kw GT inverter. I have recently added 3 more panels 550watts...