Anybody run Lithium battery bank with solar
I'm considering upgrading my solar and battery bank. On my Arctic Fox 25r trailer, I currently have a 160 watt zamp panel on the roof with a 30a zamp pwm controller. Additionally there are two 100 wat...
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You need 200AH a day and have two 225AH AGMs. I will guess that they are 6 volt so your bank is 225AH. You can use half of that for "usable", so what you need is two more of those 6s so you can use 225 a day and recharge. Solar won't do any of that on an overcast day, so you have to be able to do it with no solar--especially with cpap in the picture.
It doesn't matter if they are Li or not, you need way more AH of a battery bank. And now you need to recharge that 200AH daily. Not likely to get that all done every day, if ever what with clouds etc. so the usual drill is generator and charger for most of it in say two hours of gen time, then solar to do the rest all day after the gen is shut down.
Doing that 200 from 50% SOC in two hours would be say a 100 amp charger running from a 3000w generator, to get say 150 done and then you need your solar to do another 50 or else leave the gen on for another two hours (amps now tapering, so gen time stretches out)
If those are 225AH 12s then they must be those monster 8Ds and you then already have enough bank. You still need to recharge what you used though.
Li is not going to change any of that, just cost you a ton of money. (Unless you believe in the "usable AH " smoke and mirrors where they try to say one 100AH Li is the same as two 100AH Flooded for usable AH--there is some advantage there, but not near double )
You also need an ammeter to be sure your AGMs are fully recharged--amps must taper to 0.5a/100AH of bank with voltage at 14.4 till you get to there. I bet you don't do that and now your AGMs are undercharged and sulphated (hope I am wrong!)
Sorry to be a party-pooper! Ignore what does not apply.
It doesn't matter if they are Li or not, you need way more AH of a battery bank. And now you need to recharge that 200AH daily. Not likely to get that all done every day, if ever what with clouds etc. so the usual drill is generator and charger for most of it in say two hours of gen time, then solar to do the rest all day after the gen is shut down.
Doing that 200 from 50% SOC in two hours would be say a 100 amp charger running from a 3000w generator, to get say 150 done and then you need your solar to do another 50 or else leave the gen on for another two hours (amps now tapering, so gen time stretches out)
If those are 225AH 12s then they must be those monster 8Ds and you then already have enough bank. You still need to recharge what you used though.
Li is not going to change any of that, just cost you a ton of money. (Unless you believe in the "usable AH " smoke and mirrors where they try to say one 100AH Li is the same as two 100AH Flooded for usable AH--there is some advantage there, but not near double )
You also need an ammeter to be sure your AGMs are fully recharged--amps must taper to 0.5a/100AH of bank with voltage at 14.4 till you get to there. I bet you don't do that and now your AGMs are undercharged and sulphated (hope I am wrong!)
Sorry to be a party-pooper! Ignore what does not apply.
