Charging batteries at a site after an extended power failure can be a problem. There are not a lot of automotive/boat applications where the battery is completely discharged like what happens at a radio site after a long power failure. If the charging rate is not current limited a lot of gas can be generated at the site. I worked at Nextel sites where the batteries would actually swell up because of overcharging. A good sign of gassing is that many of the rubber products. like the safety rubber gloves, would get soft and sticky.
Current limiting should help stop gassing, but the full charge recovery time will be very long. 73, Joe, K1ike
