Here are some links to good battery info. I like what one manufacturer has for a slogan,
"Batteries don't die, they're murdered"!
I might add, that when you equalize be sure that any 12 volt electronics are disconnected from the circuit of high dc voltage from the inverter/charger.
I have almost 6 years on my house batteries now.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7