I've got access to 12 flexible Solar Panels - 320VDC each
Main voltage is 220VAC (here in the UK) and also might buy an electric engine running at 48VDC.
Would a 220VAC Uninterruptable Power Supply (UPS) be able to step down the 320VDC to either 220VAC or 48VDC for use on a boat?
I'm thinking of connecting 12 panels in parallel and use either:
- Double-conversion UPS to deliver 48V by bypassing the conversion from the battery back to 220V
- Line-interactive UPS to deliver 220V directly from the 320VDC.
The question is would the UPS's surge protection be able to deal with the high voltages? (Keeping in mind the sun isn't real bright in the UK).
Also with regard efficiency will there be a lot of power loss in the system?
I don't really know how surge protection from overvoltage works in UPS's and assume it uses some kind of buck conversion...is it true?
I'm guessing that the surge protection circuits might struggle with continued voltage overload. Does anyone know if this would be the case?
The question is: Will the UPS's be able to reliably deliver either 220VAC or 48VDC?
Here are the specs for each individual panel:
Open circuit voltage(Voc): 429V
Optimum power voltage(VMP):319 V
Short circuit current(Isc): 0.39A
Max operating current(IMP): 0.288A
Maximum system voltage: 1000V
THERMAL CHARACTERISTICS: (-25 ° C to +90 ° C)
Temperature coefficient ɑIsc +0.08%/ ° C
Temperature coefficient ɑVoc -0.35%/ ° C.
Temperature coefficient ɑPmax -0.15% / ° C.
Over-current Protection 30mA