If you have a built in monitoring system for the PV (inverter's onboard
metering?) that should tell you PV production, and then subtract that
from the monthly utility readings to get the household loads. I don't
see the need for a separate inline meter, but I guess it depends how
sophisticated the data needs to be. Is your client just curious, or are
they building some monster spread sheet that updates on a 15 minute
interval? Its all about the time interval they want. Usually monthly
intervals are plenty for most home owners, and that doesn't take
metering magic, just some arithmetic.
Check out the E Guage, it can do what you want. Personally I don't like
being on the hook to support stuff like that years later. I've already
had trouble with Blue Planet dropping support of their phone app, which
pissed some customers off, so I'm not into too many bells and whistles
that I have to keep supporting down the road. I've got clients that
have systems over 20 years old, so support becomes a bigger issue, the
longer you're in business. Fancy monitoring = double the call backs.
Here's all they need to do: Get the monthly electric bill, check the
cumulative production on the PV system, and then do some subtraction.
Pretty simple for them, and you only get a call, if the inverter
production is low or off.
Ray Walters
Remote Solar
On 5/11/2023 2:20 PM, Larry Brown via RE-wrenches wrote:
Does anyone have a recommendation for a high quality meter that can be
installed near the Main 200 Amp Electric Service Panel at the Point Of
Interconnection in the Main Service Panel for a Grid Tied System
The client wants to be able to track the electricity the household is actually
using
And how much the solar electric system is producing
In the net metering arrangement with Central Hudson in NY, all the client gets
to see on their bill is the net result of the solar credits subtracted from the
actual usage. In this case, the solar generated credits is consistently zero
because the usage exceeds the production
Thanks
Larry Brown
Sun Mountain
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