![]() ![]() The ideal input would be power-factor correction, a switching power supply that draws (limited) sine-wave current in proportion to line voltage and charges the capacitor.Ī simple solution is inrush limiter, some of which are NTC thermistor - they start out high resistance to limit current flow, then become low resistance so as to not dissipate much power in operation. The grid will deliver what it can, typically around 20,000A in a residential environment (maybe less depending on wire resistance. A generator would only deliver what it could. Problem with feeding AC through a rectifier t the capacitor is that it will initially present a short circuit, massive surge current much worse than a motor's locked-rotor amps. This was meant to be connected to a PV array, which would deliver Isc initially into zero volts, tapering off to zero amps at Voc. An SCC (or high voltage string inverter in my case) has a large capacitor bank on the input. Cheaper, saves the hassle of diy a power supply and is isolated from the mains. I'd go for a decent powersupply to the MPPT (Like the mentioned AC powersupplies for example). (I'm from the Netherlands - never worked with US powercords) Not sure if an US power lead can be connected 'the wrong' way, but if so (Like EU Schuko powercords) you don't have anything assuring the hot and neutral are connected properly. ![]() More important issue is safety: If you don't add any form of isolation transformer, you will connect hot or neutral to the negative of the battery, which is in many cases also connected to the chassis. That's why switched power supplies are in use If you want to build a stabilized power supply, that's going to be a whole other topic and requires some more electronics (And proper cooling) With load, the valleys will still appear, but aren't going all the way to 0V. Without any load, it will be smoothed to approx 170V DC. Adding a capacitor to smooth the peaks (along with a bridge rectifier) won't decrease the voltage, it only will fill the valleys.
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