Recent content by 33kft

That is another option. I wanted to avoid it only because of the imbalance, the different batteries will have different rates of discharge and so I would probably need to calculate and calibrate it. My initial thought was to connect the 48V as input to an MPPT controller whose output is the 12V...

I'm no expert for sure but would it not be: 4 times an hour you consume 25 watts for 5 minutes, that's 25 watts over 20 minutes per 60 minutes or 25 / 3 = 8.33Wh?

I almost forgot... The reason why I wanted to run these as batteries rather than just a buck converter off the 48v was 50% because I had the 12V battery already on hand and saw it as a cheap way of slightly extending capacity, and 50% because with sensitive equipment like computers, it's...

Newbie here, setting up a DIY off grid shed setup. This shed is going to power a bunch of fridges and appliances (via Victron Phoenix inverter), but I also have LED lighting that I want to run natively rather than via the inverter. So I thought about my needs and it basically comes down to...

So as a newbie here I think this is the biggest trap for newcomers. I bought a 100/20 thinking it would be fine for 2 x 3 panel strings but I calculated off of nominal voltage (24v) not Voc which only bumped me over by a couple volts but I did my reading first and that is enough to fry her. So...