I am interested in knowing what is the max amps that I can use to safely (ensuring the battery doesn't get too hot, and maximizing battery life). The battery is Panasonic LC-R127R2PG (12V,7.2Ah/20HR) Valve Regulated Lead Acid. I googled and found the spec sheet http://www.farnell.com/datasheets/1674772.pdf and it's listed as: "Charging Method - (Cycle use) Control voltage: 14.5 - 14.9V; Initial current: 2.88A or smaller. And Trickle use Control voltage: 13.6 - 13.8V; Initial current: 1.08A or smaller."
That seems to be super small and will take a while to charge at only 2.88 amps.
Also I am looking at solar to recharge the batteries as back up/emergency. Does anyone have a particular solar panel that he/she would recommend for this application.