Join Date: Dec 2006
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Thank you al of you for the support, I'm glad I joined this forum.
1) the 6 V ad 12 V flooded are all fom Crown batteries which seem to have an excellent reputation.
2) Th 6 v are 16" high instead of the standard 9" average so there is the difference in capacity and also weight about 123 lb.
3) The capacity of 155 and 185 A is for their model CR 155 and CR 185 wich as the same dimensions as the type 31 so therefore I called them 31 to simplify the mail. ( look in the Crown battery site )
4) The AGM batteries mentioned are Lifeline which are suposed to be top notch West Coast made and standard equipment on upscale new boats. I do not know why their rated capacity is somewhat lower that the equivalent flooded, I assumed that is part of the technology etc.
5) The reason why I choosed or planning to, a 200 A alternator is based on Nigel Calder's reccomendation, his book and personal boat and he is considered the "guru" of electrics/electronics.
He has on board his 40 cruiser
-675 A agm's total in house plus 100 a starting AGM
-2 alternators ..1 for the starting battery (plus additional support) of 80 A and Balmar of 200 A. the first one with internal regulator and the 200 A with a AR 5 also from Balmar.
He supplements its power genration with a wind vane and 2 Siemens ( wattage unknwon presumabbly 75 W)
Let us remember that AGM do not have charging limit ( theoretically) while with flooded you do not want to go over 25/35 % of total capacity maximum.
Calder has all standard equipment on board a long range cruise, windlass, 12 V freezer and cooler, SSB, electronics, audio etc etc.
I hope it helps alo lke many of you, I am somewaht concerned about such a large alternator but it seems to be the way to gfo theses days, more eficient, less time running the engine a fairly medium charge ( good) etc.
althogh the power penalty is considerable azt close to 8 HP for the 200 A alone.