Well, it takes a certain amount of energy to prevent a particular volume of water from freezing. 

In the case of TankBlanket, which services a tank up to 121 Litres against a minimum benchmark ambient temperature of -24 degC, and to achieve this using a 12V supply the draw is circa 5A . It is governed by Ohms Law.

The current UK market standard, that is, an in-tank suspended probe has a lower draw, but you have to look at performance. A typical in-tank Frostat probe currently fitted to many Motorhomes uses a 12V supply and only draws circa 2.5A, but it only services a 45 litre tank!

The TankBlanket is sensor controlled, allowing it to be cycled "on/off" depending on the current operating conditions, thereby conserving energy.

To conserve even more  energy we recommend the following:

a) Adding a TankJacket

b) Applying PiipeBlankets

c) Wait to empty your tanks until they are almost full, larger volumes of fluid take longer to change temperature than smaller volumes.

d) Make sure you switch off  The TankBlanket System as soon as you know the ambient temperature will remain above freezing. This is why we recommend the icontroller.

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