I have three $550 each US made batteries in my motorhome .My son has the cheaper $300 batteries in his camper trailer. ( Mainly because I bought them !! Lol ). After 4 years both holding up fine !! Weâll see how much extra I get from paying near double for batteries . I think the main part is battery maintenance! Have enough battery and solar so theyâre NOT draining or cycling too deep over night . Then good charging maintenance when not in use ! I learnt big time when I had 8 6v US quality batteries worth a fortune ! Stuffed in 18 months due to overcharging ! Do it RIGHT or not at all !! Itâs not just the battery . Itâs Whole system !
HI
Correct charging regime is key .
Enough solar
240v charger at least 15 amps plus generator
vehicle charging and donot forget cable size big is best . Booster diode or dc/dc charger if needed .
Saftey/ preventative maintenance
Low volt disconnect
Battery isolator
All batteries will last longer when properly installed with correct system .