I'm changing an old system from off-grid to grid-tied. The solar array had been wired in 10 parallel strings of 4 panels each, to feed fairly low voltage (82 Voc) to a charge controller for a 48v battery bank. To feed the new SMA sunnyboy 3.0 i need higher voltage. I'm all set to rewire into 2 strings of 20 panels each (410 Voc), and it just occurred to me that the panels may not be safe at that higher voltage. Without thinking about it i suppose that i'd been assuming that a system voltage up to 600v would be fine, but I don't know if that's true of these old panels.
The panels are Photocomm, Inc Power Value PV-65 modules. I have a spec sheet that lists OC and MP voltages and current ratings, but there is no mention of max system voltage. The company doesn't appear to be around anymore. Should i be concerned about wiring these panels into 410v strings?
The panels are Photocomm, Inc Power Value PV-65 modules. I have a spec sheet that lists OC and MP voltages and current ratings, but there is no mention of max system voltage. The company doesn't appear to be around anymore. Should i be concerned about wiring these panels into 410v strings?
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