A8 Parts Forum - Solar Roof trickle charge battery

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A8 Parts Forum (https://forum.a8parts.co.uk/index.php)

- D3 - Interior Electrics (https://forum.a8parts.co.uk/forumdisplay.php?f=46)

- - Solar Roof trickle charge battery (https://forum.a8parts.co.uk/showthread.php?t=9674)

Dezzy

17th March 2015 05:05 PM

Quote:

Originally Posted by mannyo (Post 90609)

Don't work on a D3, been there and tried it. The solar charger needs direct connection to the battery.

The reason it does not work is the battery controller, it blocks the current flow to the battery with the ignition off. The controller is quiet complex and even with the engine running can stop the alternator from charging the battery when it reaches full charge, its why you must use the correct connections when charging at home with the battery in situ.

Oh ok, everyday is a school day.

IT	19th March 2015 10:39 AM

But why ?

The D3 battery management is very good, and the amount of current you get from the solar panels is feeble.

Id much rather have a cool cabin, than an overly charged battery.

Yes, it sounds slightly cool to say your solar panel charges the battery, but its one of the mods that is (a) quite difficult and (b) not actually of any real benefit imo....

daviesbike

20th March 2015 04:07 PM

Having had issues with D3 management in the past I did look into it and given the number of cells on the roof it would output, 3Amps of power and 35W and that's the same as a Cetek trickle charger.. In theory it would charge a battery just fine +++

I must be honest though ( touching wood profusely) I’ve had no issues with the new car battery wise at all its honestly perfect .. Maybe if it’s not broke ...I should ... :tuttut:

snapdragon

20th March 2015 05:44 PM

I think it would be cool - and don't see any problem hooking it right up to the BEM as it will only trickle charge and only in the day. Mine will charge with the ignition off - I have done this overnight in the past

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