The complaint is almost as bad as the item it complains about.
There are almost no situations where any power factor correction unit, KVAR, or one of the new names being invented each day, will save any electricity in a home installation. In many cases they use electricity!
Please Google "open4energy energy scams" where we have a complete directory of information on consumer power factor correction so you can understand what your options are!
The manufacturers of genuine power factor correction devices, well suired to commercial and industrial use have unleashed a spate if internet resellers, who in many cases do not even know what they are promoting.