I've got an electric Firefly that needs new batteries. It's currently got ten Powertech AGMs, 8A24 12V 79Ah. These have lasted about 4.5 years, 250 cycles and 2500Ah total in their lifetime with occasional driving. I want to start commuting with this car, but the batteries are now too tired to get me to work. I was getting about 35Ah when new, now I'm getting about 12-15Ah.
My commute is 12km and about 15 Ah each way, and I'd be charging at work, so I'd be putting about 500 cycles per year on the pack. I'm struggling with justifying buying a new pack if it will only last a year or (maybe) two with my usage.
So far I've considered Optima blue tops, the same 8A24 Powertechs I have now, and Geltech 8G24s. All are approximately the same price at about $190-215. The Geltechs look to have the best cycle life (650 @ 50%DOD), but I'm not sure they can handle the 350A max current draw. I'd prefer to stay away from floodies because the rear battery box is hard to access for watering.
Does anyone have suggestions for what batteries I should get? The only option that seems worthwhile for my usage is lithium, assuming they actually meet their 2000-3000 cycle rating.
Thanks!
David
My commute is 12km and about 15 Ah each way, and I'd be charging at work, so I'd be putting about 500 cycles per year on the pack. I'm struggling with justifying buying a new pack if it will only last a year or (maybe) two with my usage.
So far I've considered Optima blue tops, the same 8A24 Powertechs I have now, and Geltech 8G24s. All are approximately the same price at about $190-215. The Geltechs look to have the best cycle life (650 @ 50%DOD), but I'm not sure they can handle the 350A max current draw. I'd prefer to stay away from floodies because the rear battery box is hard to access for watering.
Does anyone have suggestions for what batteries I should get? The only option that seems worthwhile for my usage is lithium, assuming they actually meet their 2000-3000 cycle rating.
Thanks!
David