Hi,
I have a single Multiplus 12/2000 with a 30A AC input connection. The meter on the grid is reading 2x-3x what the Multiplus is reporting. Is it possible that logging input voltage and current from the Multiplus that it could be off by that much? It seems unlikely.
Furthermore, running a single 1.5kW heater for 9.5 hours the grid meter indicates 25kWh of usage. The Multiplus indicates 9.16kWh. My estimate of maximum possible usage from the heater is 14.25kWh. The only loads are the Multiplus, a raspberry pi performing the logging, and the heater. Is it possible the Multiplus is somehow using the remaining 10+kWh of energy? My battery bank isn't even that large.
My battery bank is flooded lead acid and has been on float charge for weeks because they have been virtually unused minus a few LED lights. If the Multiplus was actually pumping that much current into the batteries, they would be dry by now. Further, the unit does not report any significant charge current.
The Multiplus is, however, humming quite loudly. Is it possible that energy is somehow being consumed in the unit due to a fault of some sort?
Just trying to rule out all the possibilities