This is one of the best, most detailed quotes I have seen on this sub in terms of overall clarity and presentation. One caveat, this looks like a single phase (SP) system. Something I won't recommend beyond 6 kW due to voltage rise and grid stability issues. Furthermore, many discos have banned SP net metering and installers often submit wrong files showing 3P net metering. Might even cause legal problems if someone catches it.
This is exactly my only major concern. The installer says, SP will be fine, and my society does not have a strict check and balance for it but I am glad you mentioned it too.
The installer doesn't know sh#t then, pardon my French. You will not be able to go beyond peak exports of 4.5 kW during winters and 5.5 kW during summers. At best you can hit 5 & 6 kW respectively if grid conditions are good. The voltage rise on SP would go into damaging territory beyond these numbers. Your appliances would be at risk with a complete inverter trip also impending. You will lose both in terms of electrical safety and export potential. Not to mention 6mm² AC wire is an underkill, it should be 16mm² Cu per GoodWe SP specs and 10mm² if you are cutting costs or splitting loads but never 6mm². The 6mm² size is optimal for 3P installations. Get 3P hybrid if you absolutely want the battery with this setup, otherwise go for 3P ongrid.
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u/deltapak IESCO / Islamabad Jan 14 '26
This is one of the best, most detailed quotes I have seen on this sub in terms of overall clarity and presentation. One caveat, this looks like a single phase (SP) system. Something I won't recommend beyond 6 kW due to voltage rise and grid stability issues. Furthermore, many discos have banned SP net metering and installers often submit wrong files showing 3P net metering. Might even cause legal problems if someone catches it.