We are currently on a 3-phase supply with OVO and use all three phases (Ground source heat pump on all three, house on L1 and outbuilding on L2). Ovo metering team cannot yet fit a polyphase smart meter in this area I’ve been told and we are on a Elster A1100 3-phase meter installed 4 years ago.
We also have a small solar array on the house roof with a single phase inverter connected onto the house phase (L1). it is not a very large installation, producing just over 10kWh a day, and has no battery to store any unsed production - we currently give it away for free to the grid(!)
QUESTION - Does anyone know if this type of polyphase meter performs a vector sum of all phases such that the net consumption is billed to me. (ie can I be producing a couple of kilowatts of solar on L1 and using the same or less on L2 and not see the meter reading increase?
I don’t like the thought of giving away electricity for free, but the economics of adding a battery (and space required) plus the lack of a SMETS2 smart meter option mean I have no choice.
![](https://uploads-eu-west-1.insided.com/ovo-en/attachment/16342125-fede-43a3-a836-ec71469608d9.jpg)