Hello esteemed Wrenches;
I'm currently at a remote job site in far Northern BC, float plane and
helicopter access only. My system install was a success, as I am using
satellite internet to ping the list here!
There is a main lodge, and a remote camp, and neither are occupied from
November thru May. The remote camp gets ZERO sunlight for 3 months of
the year, while the main lodge is on a lake and gets some sun each
month. Both PV arrays must be stowed indoors for the winter, as they are
on ground racks and the Grizzly bears and moose will rip them to shreds
when nobody is at the camps during winter, and snowdrifts can be 10 feet
deep or more.
My plan is to move the small battery bank box (2 Trojan T-105s in a
cooler) to the Lake by helicopter each fall, parallel it with the
batteries there all thru the main DC fuse (6 Trojan T-105s wired for
12v), and run a small winter maintenance PV panel into all for the
winter. Total of 880 amp-hours capacity.
My question is, how much winter charging is needed to keep the batteries
charged and prevent freezing? We have an existing Unisolar roll-up panel
on site that is showing 24 watts on my meter, and can be mounted on a
tall pole. Is that enough? Temps can reach 40 below F.
Your input is appreciated!
DAN FINK
Buckville Energy Consulting LLC
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