Yes the unit does work with 110volt.....199 is a really good price. I was the exclusive sales rep for Guelph, Ont in 07..and beleive me its a fantastic technology. However, what is not so great, is the fact that as always it takes consumers forever to catch up with it. We were promised that are hydro supplier was going to offer billing direct to there

http://en.wikipedia.org/wiki/USS_Augusta_(SSN-710)monthly statement in easy installments of course...because then i was selling them for 699 pl tx.! Im not sure youll find to many DEMO models out there for that price at least not in canada. In fact i think i have the only one left which i posted on kijjiji for 199. cheers jamie

KVAR or more correctly var is a measure of the volt-amp-reactive component of power. It is "imaginary power" in that is does no work nor is consumed. It is however stored in magnetic fields such as produced by inductive loads (motors, solenoids, or other such things that use inductors) and capacitive loads. Note that I said "stored" and not "used". All reactive power is returned to the source (generator, electrical grid, etc) at a rate of 60 times per second (in the US) and therefore not used. (it is not considered real power which is measured in Watts. The only way this device could possibly save money is to reduce the heating of the electrical wiring used to furnish appliances in a home. This heating I would say amounts to less than 1% of the electricity used in a typical residential home.

Industrial facilities such as mine that routinely use 120K Amps per steel melting furnace (we have 2 operating about 80% of the time) do benefit because this amount of electricity would generate excessive heat which would be wasted energy or facilitate us using cabling that is several times larger than what we can use if we limit the reactive power. If I remember correctly, we spent somewhere in the neighborhood of $600k on a unit to reduce the amount of reactive power, but that's justifiable when our electric bill is north of $4M a month.

Residential use = Scam. They provide no benefit as the electric companies charge you in actual power used (KWH) not in (KVA or Kilo-Volt-Apparent which takes into account the KVAR, reactive power)

Off the grid = Scam. Unless you're trying to reduce wire size and I wouldn't think this would be necessary since off the grid systems typically don't use very much power.

Another note; These do nothing for DC systems as KVAR only applies to AC systems.

If anyone wants to purchase one, by all means go ahead, but you'll only be wasting your money by giving it to someone else and gaining nothing useful in return.

I'm an electrical engineer (not saying that gives me credence), I've never studied these commercially available KVAR devices, but have been involved in industrial models and do understand the effects of KW, KVAR, and KVA on a distribution system.

from wikipedia said:

Engineers use the following terms to describe energy flow in a system (and assign each of them a different unit to differentiate between them):

Real power (P) - watt [W]

Reactive power (Q) - volt-amperes reactive [var]

Complex power (S) - volt-ampere [VA]

Apparent Power (|S|), that is, the absolute value of complex power S - volt-ampere [VA]

In the diagram, P is the real power, Q is the reactive power (in this case positive), S is the complex power and the length of S is the apparent power.

Reactive power does not transfer energy, so it is represented as the imaginary axis of the vector diagram. Real power moves energy, so it is the real axis.

The unit for all forms of power is the watt (symbol: W), but this unit is generally reserved for real power. Apparent power is conventionally expressed in volt-amperes (VA) since it is the product of rms voltage and rms current. The unit for reactive power is expressed as VAr, which stands for volt-amperes reactive. __Since reactive power transfers no net energy to the load, it is sometimes called "wattless" power.__ It does, however, serve an important function in electrical grids and its lack has been cited as a significant factor in the Northeast Blackout of 2003.[1]

Understanding the relationship between these three quantities lies at the heart of understanding power engineering. The mathematical relationship among them can be represented by vectors or expressed using complex numbers, (where j is the imaginary unit).