Batteries
I have a 2021 Thor Omni 4x4 sv34. I am replacing the two lead batteries most likely with lithium with BMS. Any recommendations would be greatly appreciated. Thanks
Forum Discussion
Most retail lithium 12v batteries are going to be capped around 100-200amps (continous vs peak load) before he BMS cuts power. If this is for the starting batteries, that's not viable as a big diesel engine can ask for 800-1000amps or more.
If it's for the house batteries, lithium is great but the charging gets more complicated. Lithium and lead-acid want different charging voltage and amperage. So if you want the alternator to charge the house bank, you need a separate charging circuit that is able to take the power off the alternator (or thru the starting batteries), adjusts the voltage and feed it to the lithium. If you put in a good size solar array, it is possible to simply disconnect the house bank from the alternator side of the 12v system (or if you never boondock, but if you are always on shore power, you don't gain much of anything going to lithium).
Most retail lithium 12v batteries are going to be capped around 100-200amps (continous vs peak load) before he BMS cuts power.
more and more are coming out with higher numbers now. 5 years ago this would have been true, but as more retail are going into the 200, 300 and larger banks the BMS are getting quite a bit higher. and the peaks are not just double the continuous anymore. I just watched a test where the Over current functioned to 700A mind you it was a less than 1 second shutdown but the 100a bms did 220 amps continuously. so that was a little different.
take Battleborn or dragonfly or over priced batteries, what ever you want to call them there 270AH battery is rated for 300A continuous.
look at the cheep redodo its 100amp battery is rated for 100 amp continuous but 300A for 5 seconds.
