Got some work done on the 24v bank balancer setup. Bought 4 of these heatsinks and cut them in half.
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Cut some wood pieces and attached as shown.
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The balancers/heatsinks will be electrically isolated from one another, which means the balancers can be mounted to heatsinks without insulator pads (better heat transfer). These heatsinks are not very big, but my experience with the huge heatsink on the first set (48v setup) tells me it was overkill. Hopefully these small individual sinks won't be 'underkill' and will do the job.
On the backside, two 12v standard 4" fans temperature controlled.
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Still awaiting delivery of the balancers, and haven't completed paralleling all the module cells, but some progress anyway.