In article ,
Brian Reay wrote:
Think you'd be hard pressed to make a 20 amp limear supply to retail at
about 100 quid?


There are some switch mode ones around which aren't bad, mainly for the
amateur radio market BUT they are power supplies not chargers- which is
(hopefully) what was being used to charge the battery in the motorhome.

No. It's is a simple 13.8v regulated supply. As has been used to charge
SLA (constant voltage) from the year dot. Wet car batteries may well be a
different matter.
A proper charger will help ensure the battery/batteries are not over
heated etc and, assuming the motorhome has a proper smart controller,
interface with it to ensure the vehicle battery is also charged when on
mains, the leisure battery/batteries are charged by the vehicle when the
engine is running, and interface to any solar system.

The charger to my burglar alarm SLA battery is 13.8v regulated. And no
mobile device is going to be on charge constantly like that. Battery lasts
about 10 years.

--
*I speak fluent patriarchy but it's not my mother tongue

Dave Plowman London SW
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