A virtual power plant is where an energy company like Meridian remotely manages and optimises the use of the stored energy in people’s homes (mainly EV batteries) and the timing of things like EV charging and heating hot water to take pressure off the grid. This is done using special software and customer preferences, so we know – for instance – how much charge you need in your EV at any given time.
By doing this on a large scale we’re aiming to free up power in peak periods and reward customers for the part they play, saving money on their overall power bill.
The potential is huge. We believe a virtual power plant could offer as much peak period electricity as a wind farm or small hydro station, and they will play a key role in helping New Zealand’s electricity deal with the growing amount of wind and solar generation, which – needing wind and sun – can’t always be relied upon.
Households would need to sign-up to take part, but the potential savings are significant. Where possible, based on their preferences, the virtual power plant will charge batteries at off-peak times, releasing stored power back into the grid when needed in peak periods. Likewise, things like water heating will occur outside peak periods whenever possible.
When done on scale, all these little savings will add up to take substantial pressure off the electricity system in peak periods, with customers compensated for being part of it and saving money on their overall bill.