As the title says, is it necessary to precharge the capacitors on the DC bus if the Multiplus is grid connected and there’s a supply on AC-In? ie. Will the inverter charge the capacitors on the DC bus via the AC bus?
My system is going live in Monday and I’m trying to avoid massive sparks and arcing when I turn on the battery DC switches. The reason I ask is that when I was preparing my batteries by top balancing them and I initially connected my power supply, the connection to the battery terminals created a massive spark which I subsequently avoided by putting a 32Ω, 20W resistor in series when charging subsequent batteries.