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SolarEdge Home Battery for a heat pump in Plymouth
Updated
A SolarEdge Home Battery will not run a heat pump through a cold Plymouth evening from 13.5 kWh. It can shift a slice of the Plymouth load into a cheaper window, and that slice is the only honest sale.
SolarEdge Home Battery on a heat pump in Plymouth
Wind on the roof and steps up from the van both belong on the quote, not in a surprise email, which is the constraint I would write next to SolarEdge Home Battery for this heat pump.
National Grid Electricity Distribution covers this Plymouth example. A 4 kWp-class roof at 1050 kWh per kilowatt is about 4,200 kWh a year before shade, and SolarEdge Home Battery does not change that weather.
Money for SolarEdge Home Battery for a heat pump in Plymouth
Take a 13.5 kWh pack, cycled about 340 times, at 90% round trip. Charge at 13.0p, and value what comes back at 30.8p. Export given up is priced at 12.0p. About 2623 kWh a year of the charge is treated as spare solar from 4 kWp that might otherwise have been exported. Delivered energy is about 4131 kWh. After charging cost and lost export, the figure saves about £765 a year. Set that against £8,124 fitted, which is a September 2026 illustration at the temporary 0% residential rate, not a quote. That is a simple payback of about 10.6 years on these assumptions. Nudge the night rate up by 4p and see if you still like it.
Where the job is a qualifying install in a home, the 0% rate runs to 31 March 2027 and is due to become 5% after that. This figure prices the work at £8,124 on that basis. It does not apply to a shop, and it does not apply to a battery you buy and fit yourself.
Connection for SolarEdge Home Battery for a heat pump in Plymouth
In Plymouth, on National Grid Electricity Distribution, 5 kW sits above the 3.68 kW G98 line, so this wants a G99 application before anyone energises it. Export can still be capped. Agree that before the inverter is ordered. The figure uses 13.5 kWh and 4 kWp, which is enough to tell two quotes apart if they assumed something else.
In Plymouth, the weak case for SolarEdge Home Battery is simple: Mixed-brand roofs and anyone told they must replace working optimisers without a reason.
Would I proceed with SolarEdge Home Battery for a heat pump in Plymouth?
I would not sign off a 13.5 kWh install from a video call. Someone has to open the consumer unit.
I would proceed on SolarEdge Home Battery for a heat pump in Plymouth only after the cupboard, the 5 kW connection route and the tariff gap are written down.
Common questions
Is the price on this page a quote?
No. £8,124 is a September 2026 illustration for a 13.5 kWh example at the temporary 0% residential rate. Your survey replaces it.
Will it stay on in a power cut?
Only if a gateway or essential-load board was designed and paid for. A standard grid-tied battery turns off with the grid. On this 13.5 kWh example the inverter is 5 kW, and backup is still a separate line.
What paperwork should I keep?
Keep the MCS certificate where the job is certified, the electrical certificate, the DNO record, the schematic, the warranty registration and a photo of the schedule. For an illustrated £8,124 job, that folder is part of what you bought.
What if the cheap rate is not 7p?
Then the figure changes. This page used 13.0p as a charge rate and 30.8p as the rate avoided. A smaller gap means a worse payback. Read the live tariff.
Sources
Want a price for your house?
The figures above are a rough guide. An installer still needs to see your fuse board, where the battery will go, and whether you want power during a blackout.