Thin Plate Pure Lead battery AND the Six Rules of Thumb
here is an article by Nigel Calder, who is without a doubt the best writer on yacht systems alive on the planet, has written this intro on the newest AGM technology from the original developer of absorbed glass mat batteries.
Odyssey. The 4 page piece is titled 'Charging Into the Future.'
google> Charging into the Future
sailmagazine.com/boatworks/.../charging_into_the_future/ -
http://74.125.155.132/search?q=cache...J:sailmagazine....
[Did not type in what reproduces here in blue...]
These essentially drycell batteries sound fabulous.
A Group 31 (75#) will set you back a paltry $300. BUT........
That article came out in 2008...
I read it back then and started checking out the Odessey batteries because I knew I wanted an electric inboard for Destiny. The PC1800 will give me 215 Amp HR of power and they will weigh 526 lbs. which is very close to the 500 lb added weight in the keel of the commander. So when I pull the extra lead pig out I will be back to almost the same weight. They will cost me $2356.00 plus tax and last 7 to 10 years. If something goes wrong in the first 4 years I get a new battery for free with no prorating. And I can actually drain them dead and not seriously harm the battery. They are a good deal IMHO.