theoldwizard1 wrote:
Friend of a friend of a friend handles simple maintenance on sewage pumping stations in their small town, maybe a dozen or so. Each has a generator that automatically starts when the power goes out longer than 1 minute. He was replacing the starting batteries (maybe this was the issue - starting batteries) every year or two until he hooked the trickle charger (Battery Tender ?) to a mechanical lamp timer set for 4 hour per day. Life expectancy jumped to 4 or 5 years.
The Battery tender will reset every time the lamp timer switches back on. The best way to use a Battery Tender is to either leave it connected to power or cycle it on for several days per month. Just going by the green lamp will not tell the full story, the battery will take more charge for some time after the green lamp comes on.