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Are zap stoppers really needed on alternators?
The reason for the 800 amp hour bank is that I will have two large
computers, a 3000 watt inverter, SSB radio and a rather powerful autopilot. All of which will eat a fair number of amps. I have estimated my daily energy budget underway to be between 180 and about 225 amp hours. Two other factors determined the bank size. The first is that deep cycle batteries should never ne discharged below 50% to preserve their useful life. That limits my usable power to 400 amps. The second is that I would like to keep engine time to a minimum. All the systems that use engine power, charging, watermaking and refrigeration are designed to restore themselves in one hour of engine time per day. Up to about 75-80% charge, deep cycle batteries can accept a charge current of up to 25% of their capacity. As they approach full charge the rate has to be reduced substantially. That sets an upper limit for daily charging at about 80%. The result is a net usable capacity of 30% or about 240 amp hours. As I said, You set the tone of the conversation. -- Glenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com |
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