Paul Z. Posted April 26, 2021 Share Posted April 26, 2021 Hi everyone, I have a question about PFC. For a while now, I've been using some very large battery chargers to charge from the grid. These chargers use a rectifier bridge and filter, which inherently has very low power factor. I haven't measured it, but it's probably 0.7 or something horrible like that. Up until this point, I really didn't care, because residential utilities only charge for actual power used, so it did not cost me any extra if energy was wasted via poor PF. However, now that I'm charging off-grid via AC-coupled solar, I want to be a little more careful. I have a 240 VAC solar system is AC-coupled to the Powerjack, so my 240V battery chargers are charging primarily off the 240VAC coming from the solar string inverters. Now, my question is, will the poor power factor make a difference since I am running a closed system? My guess is that, with a closed system, the resonance from the poor power factor will not cause any major losses, unlike on the grid. But, since my guesses are typically wrong at least half the time, I would rather get some input from someone who knows about this stuff. Because all the current losses will be contained with in the walls of the house, I am assuming that the minimal wiring will cause very little energy loss. But, please correct me if I'm wrong. - Paul Quote Link to comment Share on other sites More sharing options...
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