On 3/26/2014 12:21 PM, mike wrote:
On 3/26/2014 9:47 AM, amdx wrote:


I put a power meter on my water heater in 2008.
Look on Ebay, they're cheap.

Got a link? I didn't find anything that would work on
a hard-wired water heater.


I used a regular house meter. You need to break the wire insert
meter box and plug the meter into the box.
http://tinyurl.com/mg3s98c




Cheapest water heater power meter is an electric clock
across the element. You'll need a 240V clock or stepdown
transformer or a relay or some such.

Another fun thing to do is to use a 25-cent Palm III PDA
to watch the flashing light on the power company's digital
meter. Graph the power consumption in real time.
Pretty easy to see when the water heater comes on.



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