How does a load controller on a home work? We have the on-peak/off-peak hrs set up here on our meter.

Typically it is simply a time clock that shuts off power to certain appliances during peak usage hours.

The FPL controllers are addressible so they can turn off the selected loads whenever they like. They do try to do a rolling blackout of the loads so you are not without A/C or hot water for long (typically 30 minutes or less at a time)
My mom had it and she says she never really had a problem.

I have heard of it a number of ways.

One is with a cut rate off peak meter, which is activated through a pilot fed contactor, another just disables the loads on the normal metered service in peak times.

Recently, Toronto and some other cities have institused remote A/C disconnects, which turn off yours and many others A/C on radio command.

I have seen a load splitter, which allows you to selectivley feed a large heating load or other intermittent loads. It would give preference to the other loads, and disconnect the heater to let the other loads use the same power.

Concerning the FPL load controllers, I can say the system is completely transparent.
I have had it on my water heater and A/C for the last 15 years or so and have never noticed it's operation. I do notice the discount they give me on my power bill though.

{Edited, cuz I kant spel}

[This message has been edited by IanR (edited 09-12-2006).]