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I check ways from the Internet to reduce energy consumption. ELECTRICITY SAVING BOX FOR PLN 27 and COMPENSATION CHOKE for PLN 80 Does their use at home make sense? What's inside? Is it a dummy? How does active, reactive and apparent power change? The use of the "power saver" does not have a negative effect on the energy used to supply other appliances in the house. There is a 40-50 var capacitor inside, which reduces the reactive power. In the case of modern households, reactive power is negative and reducing it makes the situation even worse. Therefore, it is appropriate to use a device that works in reverse, a shunt choke. Will its use have a positive effect on energy consumption at home? Will reactive power improve? At home, we do not pay a penalty for reactive power. Workplaces, offices and anyone else with the C11 tariff must pay. In the case of inductive reactive power, i.e. the one whose parameters are improved by the electrcity saving box, there is no penalty for each kvar, but for exceeding a certain amount of kvar in relation to the kWh consumed. In the case of capacitive reactive power, the fee is for each kvar, which is more or less twice as high as the price of kWh.