DO YOU KNOW THAT WATER IS AN EXCELLENT BATTERY?

Water has a very high specific heat capacity (4182 J / kg / K) - which indicates the ability to store heat in itself. Water is approximately twice as good a heat accumulator as oil, eight times better than iron, and even thirty times better than lead!

Water heating is a different and much cheaper way of accumulating energy as compared to electrochemical accumulators.

A 2OO-litre-boiler can accumulate about 10kWh of energy per day – batteries with such a capacity are much more expensive but have a much lower lifespan. It is also necessary to use them correctly. In other words, discharge them only to a certain level and don't leave them empty for a long time, because this reduces their lifespan.

Of course, the comparison of the boiler with the battery is not entirely accurate – electricity saved in a battery can be drawn again in the form of electricity, but energy saved in a boiler can only be withdrawn as hot water. However, water heating is usually the second largest energy cost in our latitudes (the first is heating), and therefore almost any savings is worthwhile. With the advent of low-energy and passive houses, the consumer priority is also changing, and alternatives to classical water heating techniques are being considered. Photovoltaic water heating is an efficient way to reduce energy costs.