Join Date: Nov 2010
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Re: Which charges more efficiently? Fast Charge or Trickle Charge??
I made a mistake by thinking that a question simply put would give the wanted answer. I see I was wrong and didn't realise assumptions would be made that throw my question off course.
Sorry... so... here is the amended question that I think has been answered by 'heat' but I'm not sure.
I am in a marina in London for all of winter with *Extremely* expensive electricity. US 30 cents per kilowatt (GBP .245 cents per KW).
I have solar panels in a reasonably sunny position. But I need to augment that with a bit of shore power charging.
I generally only drop the batteries down 10% per day... about 50 amp hours on the meter. This will be made up by the solar on a normal sunny day. But when its not due to ice, snow, grey clouds ect I need to put in about 50 amp hours per day.
I only turn on any charger on demand and turn it off before fully charged (I get to fully charged on sunny days at least once per week).
So the question is does a battery accept charge better faster or slower?
The answer appears to be the by-product of heat produced by the units. Where heat is generated there must be an inefficiency in the charging unit.
The longer the charger is on the more time for heat to generate.
If the 25 amp charger is a marine, new technology and claims very little heat generated its shorter charging time (say 1.5 hours) it would be more efficient than a much longer, 8 hour, changing time at lower amps with heat generated from the trickle charger which is a cheap auto charger.
It may just be a few cents per hours, but over 6 months a dinner with a few beers...
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