Wednesday, Oct 31, 2012 at 17:18
My GU has an uprated alternator from standard 100ah to 120ah, for my starting battery I use and Optima yellow top it's a D31. For the "house" battery having wrecked 4 of the same yellow tops, I now have a Lifeline VLRA battery, 100ah. Problem in the GU is the aux battery position is that is is right beside the Turbo and the battery gets Cooke. had I known this I would not have fitted it there at all and made space in the back. We did for a period have a third Yellow top Optima in the rear, this is where the EFOY fuel cell has been built in. It's like having a battery that never goes flat. We also have a CTEK 240v to 12v charger that chargers both battery's when mains is available. The EFOY is set up to charge both battery's. You can set the "start" charge threshold, and the cutoff threshold, in the setup.
So
mine is an EFOY pro 2200 it produces 2160 Wh/day nominal power 90w 12v/24v, weighs 8.95 kg. on charging at 12.3 v off at 14.2v.
We had some concern about it operation during 4wd as the info states max 35 degrees around the roll axis temporary max 45 degrees and max 20 degrees around the lateral access.
We also had some concerns around the operating temperature, hence my design of forced cooling fan, as the specs states-20c to +45c.
None of these have been an issue so far, we will keep an eye out as the ambient temperature, rises for summer. That said, it is in the rear cabin of the GU, so whilst driving its air conditioned, and not operating
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