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There is what appears to be a contradiction in the 2017/2020 code between 690.31 (A) and 690.31 (G) (2017) or 690.31(D) (2020). Paragraph A says all wiring methods included in this code shall be permitted. Than A says were PV source and output circuits operating at voltages greater than 30...

How does a SPD pull voltage to ground when the wiring from the CB continues to the inverter? Thanks…

I am putting together a box to house a 20 amp circuit breaker and SPD for each string. I just noticed that the positive and negative sides of the circuit breaker do not match up to positive/negative sides of the SPD. Does that matter? Obviously I will keep positive to positive and negative to...

I made an initial purchase of 19 modules 380W, 48v VOC, 10.5 Isc. Can I mix 385W, 49.04v VOC, 10.17 Isc modules in the same series string, or should I keep them separate? Thanks!

Good morning. I have a rack of batteries from EG4. 3 on my initial order with rack and I just received 3 additional. These are all 48v V2, although they are different. All batteries were charged to over 80%. 1 of my first batteries turns on but now only a single light (the first state of charge...

With 2 EG4 6500s and 19 (380w. 48 voc, 9.3a) modules. I have a question on the number of strings. Is it better to maximize one MPPT on each inverter (10 modules on one, 9 modules on the other) or is it better to put 5 modules on three mppt and 4 on the 4th? Wired in series. Thanks for you input.

Hello, I need to connect my 2 EG4 6500EX inverters so I have grid power to charge the batteries if solar is not available. What size AC breaker should I use for the AC in? Thanks,