I have 3 strings of 5 panels. Can I combine 2 strings of 5 panels each together in parallel to one input and send the other 5 panels to the other input? Longi panels 535W VoC 49.35, ISC 13.78. SPH6000 TL inverter has max DC V of 550, Start V of 150 and Nominal 370. Max input current 13, max short circuit current 15. What is the best solution? I have the 3 strings mounted.
Best way to combine 3 strings to 2 Inverter inputs?
- Thread starter AussieF3B
- Start date
sunshine_eggo
Victron's little biatch
Rewire for two strings: 8S into one MPPT and 7S into the other.
Your ISC is 13.78A, which is nearly to the 15A limit, so no option to parallel them.
Your ISC is 13.78A, which is nearly to the 15A limit, so no option to parallel them.
Thankyou for that answer. One of my panels is actually damaged so I will make two strings of 7 and exclude the 15th panel. I have some other newb questions.
1. If I use grounding plates sandwiched between each panel and the rail - is an actual ground wire required between each panel?
2. Is a bare #6 copper OK from the array rails back to a ground rod near the inverter?
3. Is it OK if that bare #6 ground is routed zip tied on the outside of the metal conduit I put my PV wires through?
4. If the Grid power to the Inverter is already supplied from a breaker in my sub panel - do I still need a breaker on the EPS output from the ATS to my pump contactor?
1. If I use grounding plates sandwiched between each panel and the rail - is an actual ground wire required between each panel?
2. Is a bare #6 copper OK from the array rails back to a ground rod near the inverter?
3. Is it OK if that bare #6 ground is routed zip tied on the outside of the metal conduit I put my PV wires through?
4. If the Grid power to the Inverter is already supplied from a breaker in my sub panel - do I still need a breaker on the EPS output from the ATS to my pump contactor?
sunshine_eggo
Victron's little biatch
1. Probably fine. Many racking systems have a means of biting through the panel's anodize for good contact, and then running a single ground wire to the racking system.
2. Probably, but you'd need to check the code.
3. I don't know.
4. Every circuit needs over-current protection. If that breaker adequately protects the wires on the other side of the ATS, then it's probably fine.
@timselectric can answer these better than I can.
2. Probably, but you'd need to check the code.
3. I don't know.
4. Every circuit needs over-current protection. If that breaker adequately protects the wires on the other side of the ATS, then it's probably fine.
@timselectric can answer these better than I can.
@timselectric would you mind giving me your thoughts on the questions above? TyiA
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