Lithium Battery Recommendation

[DT6]

Hi,

We pickup our 21C later this month and it will be "Lithium Ready". I am seeking some battery recommendations, especially with respect to the Battery Management System (BMS) and whether it includes low-temperature cutoff or not. Also, how important is the "Max Load Rating" (is this the same thing as "Load Power")?

Winter temps where we are in Oregon can get down to near zero (F) on a bad day, but certainly near 20F or less many times between December - March. So if I understand the technology correctly the lack of a low temperature cutoff could damage these if I leave the battery cutoff switch on the trailer "ON" and temperatures here drop below freezing?

John (in Santa Cruz) has recommended the SOK 206Ah and that seems to be a solid recommendation. https://www.sokbattery.com/products/...e-battery-pack

Alternatively, Ampertime, which has a decent reputation it seems, has a heated version but unless I'm missing something, that draws power to keep the battery at a proper temperature, whereas (I believe) the SOK will simply shutoff until the battery temp is warm enough to charge safely. https://www.amperetime.com/collections/ampere-time

I'm not sure which is the best alternative between the two, again assuming that a low-temp cutoff in the BMS is critical.

If the low-temp BMS is not critical, there are certainly less expensive alternatives.

Thanks!