My boat has 4x Trojan 6 volt batteries which gives me a small 225ah 24 volt emergency mains power backup at 230 volts. My original quasi sine wave inverter was obviously limited to what it could safely be used to power. For this reason, I want to upgrade to a pure sine wave unit.
My problem is this. Trojan deep cycle batteries prefer a bulk charge rate of 29.6 volts, and so far I've not found a pure sine wave unit that will allow this voltage without complaining. My old inverter has an upper voltage cutout at 30.5 volts.
I have set my Victron mppt controller to 28.4 volts but this seems a waste of solar energy.
Is there an efficient way to step down from 29.6 volts to 28.4 so that I can satisfy my Trojans without upsetting the inverter?
Many thanks, Stu
PS. I'm running fridge, freezer and flat screen so thought maybe a 1500 watt inverter (same as my old one) should cope.
My problem is this. Trojan deep cycle batteries prefer a bulk charge rate of 29.6 volts, and so far I've not found a pure sine wave unit that will allow this voltage without complaining. My old inverter has an upper voltage cutout at 30.5 volts.
I have set my Victron mppt controller to 28.4 volts but this seems a waste of solar energy.
Is there an efficient way to step down from 29.6 volts to 28.4 so that I can satisfy my Trojans without upsetting the inverter?
Many thanks, Stu
PS. I'm running fridge, freezer and flat screen so thought maybe a 1500 watt inverter (same as my old one) should cope.