Battery recommendation

Trojan has a proven track record. They are the standard for SLA 6V batteries. If economy is important, shop for Trojans through a golf cart distributor or cross the border. Canadian Tire sometimes run special sales on batteries but getting big discounts on a "real" deep cycle battery is difficult.

6V GC2 batteries are much more durable and have a longer life, overall, than typical marine hybrid deep cycle/starting batteries. They can be drawn down a bit more than typical 12V and will recover from infrequent deep discharge.