Friday, Dec 13, 2002 at 01:00
Marcus - have a look back through this thread and also other threads and see if you can find ANY where Axel and Karen have responded with a sensible reply. I think that you will have trouble! It seems that they get more satisfaction by picking at others who have tried to help.
Without knowing your battery size it is impossible to know your runtime or recharge time.
Don't dismiss
OziExplorer as an uninformed quack - he is
spot on when he says that a generator will charge the battery quicker than an alternator. Alternators are voltage regulated while generators are current regulated.
The battery will only charge as fast as its own internal resistance will allow, and as Ozi has explained - different types have differing internal resistance.
The expensive Optima range have a very low internal resistance and are widely used in ambulance vehicles for that reason. Because of the large amount of electrical equipment in those vehicles it is necessary for the alternator to be able to replace the used energy fast. These type of battery will usually fully recharge in an hour, where a depleted starting or deep cycle may take 4 to 5 hours driving to FULLY recover.
http://www.optimabatteries.com/
As you already seem to have an Engel, there is no point in trying to steer you to something else. However because the Engel insulation is a bit on the thin side, then you may help it and reduce your runtime by adding one of their insulated bags and try to keep it in a ventilated, shaded place.
I have owned Finch and Chescold 3 ways, 15 and 39 litre Engels and now have a 70 litre Evakool - and having had experience with all, can say that as far as 12v/240v fridges go, that the Evakool has a much longer runtime on the batteries than the Engel does. Probably at least 50% more. This equates to 3 days instead of 2 days. I put this down mainly to the better insulation.
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