RV FEATURE
This time, we knew what was happening was
not a result of avoiding powered campgrounds
for a month, as we’d had a two-week stay at a
Big4 park on a powered site that we’d moved
on from a mere seven days earlier. The negative is now connected after the shunt
and any power drawn via the Anderson plug
is now recognised by the battery management
system. Redarc, to its credit, has been very
helpful in our endeavour to solve this problem.
SO WHAT HAPPENED? We changed the factory settings on the BMS
so that the battery alarm will sound at 11.5V
instead of 10.5V, when the batteries ‘turn off’,
so that we will still have some power at the
time of this warning instead of none.
After much investigation, we finally found
what we believe to be the problem. We have
an Anderson plug on our drawbar, which was
fitted by an auto-electrician. This Anderson
plug connects the car fridge to the caravan’s
lithium batteries when the car’s secondary
battery runs low – we don’t have a solar panel
connected to the car battery as we have a
boat on our vehicle’s roof.
Our Redarc battery management system could
not recognise power being drawn from the
Anderson plug because the negative wire was
connected directly to the battery terminal.
As we use a lot of power in our caravan, we
have also increased our solar capacity from
400W to 660W, and also bought a portable
panel to charge the car’s fridge battery
(which we can also used to top up the van’s
batteries as needed). We’ve also upgraded
our generator to a 2.2kVA Honda.
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