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Old 06-10-2010, 05:17 AM   #7 (permalink)
tollo
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Join Date: Jan 2010
Location: Finland
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Quote:
Originally Posted by RobertSmalls View Post
300Ah sounds like quite a lot. If you add too much, you're adding too much weight and spending too much money.
300Ah sounds lot for me too but reasons why so much:

+ you can't add batteries during lifetime
+ I'm living in cold area (typical -15C in winter times)
+ only 50% of the capacity should be used to get long battery lifetime. Bigger is longer lifetime and so its better.
+ fuel price is here about 1,5eur / liter.
+ bigger means "less worries" ?

why not:

- expensive batteries
- heavy batteries
- smaller advantage on longer trips, when I need big battery bank


Alternator field switch might be much wiser mod. I think that it's possible to get about that 90% of the savings if you plug in your car after drive. In my case with the switch I could get about 30% of total fuel savings without expensive and heavy battery investment. With pit bigger batteries savings could be about 50%. (compared to big battery bank, not total savings.)
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