Alt Energy to power the tank

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Wind's the way to go.

For our high arctic auto weather stations used to run solar only and large battery packs but have been adding wind generators. We've been able to reduce the size of the battery packs because of with a relatively light wind, can dump the current into the battery through the charger. They over come the issue of frost build up, cloud and fog and of course have the panels beat on that 24 hr darkness thing.

Still think long way to go before cost effective to run a reef tank.