September 23, 20232 yr Say i have 5kw inverter with Voc of 145v and a 5kw with a Voc of 450v. What will the advantages/dis- be between the 2.
September 23, 20232 yr The 145 V max model is safer, and in some countries like Australia, it's legal to use these without the inverter model being certified and appearing on a list of approved inverters. It doesn't have problems with electrical leakage panel to earth causing weird problems like fault code 08 (bus voltage too high). The higher PV voltage models are cheaper and easier to install; typically you just string about 10 panels in series and it's done. But you need a minimum number of panels (often 4). The lower PV voltage setups necessitate many strings of 2 or 3 panels in series; each string has to be paralleled somehow (usually each string is brought down to a combiner box, although sometimes you can pair two strings on the roof and bring down one pair of wires for two strings).
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