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Even though the efficiency of the 48V DC -> 120/240VAC inverters aren't that bad, they need electrolytic capacitors which really have a limited life span because of heat buildup. That is actually what kills most PV inverters.

I like the HV DC setup because you can derive the needed voltage fairly easy from it, without need step up units using those capacitors. I think that system will be more reliable than the 48V DC systems.


A PV inverter I replaced the electrolytic capacitors of:


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