As we all know, the average power factor on domestic electrical loads
is not unity so the power company has to deliver on average some
lagging VARS to consumers. The I^2.R transmission losses from this,
as well as the larger installed generating capacity, is charged out to
all consumers either as higher KWH cost or delivery surcharges, etc.
There's no free lunch!

I happen to have a few AC capacitors to hand, not many... about 100 MFD in total, which I calculate to be about 1/2 KVAR (leading) on a 120 VAC, 60 Hz North American supply (not quite twice this in Europe on 240 VAC and 50 Hz.) Here are some questions:

Q1. Should I connect them across my supply permanently as leading VARS? (about 4 1/2 amps AC all the time at a PF of zero, i.e. all leading VARs) Q2. What would that do to my house metering? At a given KW demand: A) would my electric meter register more slowly with the leading VARS connected, or B) read even higher due to the reactive current being there all the time, even when I am not consuming any real power, or C) read just the same as it reads only KW regardless of PF? (My knowledge of current metering technology is somewhat deficient!) Q3. I figure that, at $0.06 per KWH, and counting only, say, 5% of the leading VARS for the I^2R losses (fuel costs), my leading 1/2 KVAR would be worth about $0.04 per day to the power company at the margin since I am "soaking up" (providing?) 1/2 KVAR of my neighbour's lagging VARS that the power company no longer would have to supply to heat the wires, i.e. install capacity and burn fuel to generate. What's the chance they would knock $1.20 per month off my bill? OK, silly question! Q4. Is the above a correct analysis... if not, what have I missed?

Cheers, Roger

I happen to have a few AC capacitors to hand, not many... about 100 MFD in total, which I calculate to be about 1/2 KVAR (leading) on a 120 VAC, 60 Hz North American supply (not quite twice this in Europe on 240 VAC and 50 Hz.) Here are some questions:

Q1. Should I connect them across my supply permanently as leading VARS? (about 4 1/2 amps AC all the time at a PF of zero, i.e. all leading VARs) Q2. What would that do to my house metering? At a given KW demand: A) would my electric meter register more slowly with the leading VARS connected, or B) read even higher due to the reactive current being there all the time, even when I am not consuming any real power, or C) read just the same as it reads only KW regardless of PF? (My knowledge of current metering technology is somewhat deficient!) Q3. I figure that, at $0.06 per KWH, and counting only, say, 5% of the leading VARS for the I^2R losses (fuel costs), my leading 1/2 KVAR would be worth about $0.04 per day to the power company at the margin since I am "soaking up" (providing?) 1/2 KVAR of my neighbour's lagging VARS that the power company no longer would have to supply to heat the wires, i.e. install capacity and burn fuel to generate. What's the chance they would knock $1.20 per month off my bill? OK, silly question! Q4. Is the above a correct analysis... if not, what have I missed?

Cheers, Roger