Something Funny Going On w/ New Electric Meter

[JimPghPA]

One of several things could be going on.

1) Single phase motors are often made very cheaply, and therefore can be very inefficient. Your motor could be one of these.

2) Meters have multipliers. Your old meter could of had the wrong multiplier, or your new meter could have the wrong multiplier. I worked for the local power company in their meter department quite a few years ago and they had a batch of meters come through that had the wrong multiplier. The multiplier the meter was built to did not match the multiplier on the written plate on the meter. That problem was not caught until those meters got out to the customers and they complained about their bills being too high. The power company had a portable test rig that one of their employees took out to the customers location and measured the usage and compared it to the meter and they found the customers meter to have the wrong multiplier. This is highly unlikely, but it did happen.

 

[HonorAndHonesty]

What kind of timer controls the pump, on an old electro-mechanical electric meter they do not see any usage below 15 watts in general.

Its possible the new meter is capturing that usage from the timer nownow, plus its likely more accurate than the the old meter.

Honest fact about electro-mechanical meters, they slow down over time, not speed up. This is due to the inherent friction of their inner workings. I have seen 30 year old meters registering less than 70 percent of actual usage.