Free shipping in Canada. Please contact us with your requirements as these workin many different applications like cabins, RVs, vanlife, boondocking, overlanding, solar, home back up, portable power, powerwall, skoolie. Each 12V 320Ah battery is equal to 12v 640Ah (6v 1280Ah) of lead acid batteries. Only 65lbs and 12 1/2” x 8” footprint per 4.1kWh usable. Lithium also charges 15% more efficiently from solar and provides 10x more power over its lifetime. Can be put in series and parallel for 12V, 24V, 48V and even higher capacity power requirements. With Bluetooth for monitoring and automatic self heating, these are the easiest plug and play lithium batteries. Designed and built in Surrey BC for real service.