08-14-2023, 08:32 AM
It's important to know your c rating of your lithium batteries and it makes a difference whether they're in series or parallel. 300 amp hour battery with a 1C charge and discharge rating can discharge 300 amps in 1 hour and recharge 300 amps in 1 but I try to keep my charge rating less than .5 and my discharge rating less than .5. Hi current charge and discharge rates create a lot of heat and cause batteries to swell decreasing their potential.
Here is a chart with the values I use on my home solar and our class b setup.
Our class b that we built has one 525 watt solar cell, a 24vdc 200 AH lithium battery I built, daly BMS which is programmable with low temp protection. We have 2 victron mppt solar chargers, one for the 12v glass mat battery that runs lights and pumps the other is for the 24v lithium battery which feed the 1500w inverter, microwave, coffee pot, induction burner and 24v AC and heater. No charging from the coach.
We've gone a week without plugging in to shore power running the refrigerator full-time and all the other appliances one at a time. Yesterday was the first time we plugged in in more than a week we are in Monterey California where we haven't seen the sun yet.
I have edited this post as I realize much of it made no sense. Sometimes what you see in your head doesn't come out on paper so well.
Here is a chart with the values I use on my home solar and our class b setup.
Our class b that we built has one 525 watt solar cell, a 24vdc 200 AH lithium battery I built, daly BMS which is programmable with low temp protection. We have 2 victron mppt solar chargers, one for the 12v glass mat battery that runs lights and pumps the other is for the 24v lithium battery which feed the 1500w inverter, microwave, coffee pot, induction burner and 24v AC and heater. No charging from the coach.
We've gone a week without plugging in to shore power running the refrigerator full-time and all the other appliances one at a time. Yesterday was the first time we plugged in in more than a week we are in Monterey California where we haven't seen the sun yet.
I have edited this post as I realize much of it made no sense. Sometimes what you see in your head doesn't come out on paper so well.