Electricity

Cost
In Denmark we pay for electricity at 5kr per KW.

Reducing Cost
In winter electric heaters are a significant cost. Here is a list of cost effective heating methods from cheapest to most expensive.
 * Wood Fire (Free)
 * Electric Blankets (Very Cheap)
 * Convection Heaters (The ones with the fan)
 * Oil Heaters/Radiator Style (Most expensive. Good God, don't bother.)

Warehouse Technical Info
In Denmark you're only legally allowed to increase the amperage of a fuse up to 13A without having a professional doing the upgrade.

In the event of lacking fuses it is possible to bypass the fuse by wrapping it in foil. This is super bad practice and only advisable in emergencies.

Power monitoring
It would be a fucking awesome idea to have real time measuring of the electricity usage in the warehouse. A monitoring system could and should be installed. Ideally it would monitor the electricity usage by area but at least there should be a reset-able monitor that simultaneously displays the cost of electricity. This would mean we no longer get a surprise per pay period at how much electricity we have used and instead have the power (hur hur) to reduce our electricity cost.

Peltier Charger
This would be more of a novelty and semi useful feature that would also encourage Floaters to keep the fire going. A peltier module is a thermocouple. It produces electricity when exposed to a temperature difference. When one side is hot and the other is cold a current results. One could be installed in the door next to the food storage and in winter generate enough electricity to charge a phone.

Microbial Batteries
In combination with a biogas generator it might be possible to create some electricity through making a microbial fuel cell.

It's very possible that this project would require a great deal of investment for very little reward. Still, a cool idea.

Catamaran System
The big cat has a electricity system powered by a solar panel and wind turbine.