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SolaX Triple Power for a backup brief in Derby
Updated
If the reason for a SolaX Triple Power in Derby is power cuts, the quote needs a gateway and a named list of circuits. SolaX Triple Power does not island the house in Derby just because a brochure says emergency power.
SolaX Triple Power on a backup brief in Derby
A garage and a spare way are the whole advantage. Do not spend it on modules you will not cycle, which is the constraint I would write next to SolaX Triple Power for this backup brief.
National Grid Electricity Distribution covers this Derby example. A 4 kWp-class roof at 930 kWh per kilowatt is about 3,720 kWh a year before shade, and SolaX Triple Power does not change that weather.
Money for SolaX Triple Power for a backup brief in Derby
Take a 10 kWh pack, cycled about 260 times, at 90% round trip. Charge at 11.0p, and value what comes back at 26.0p. Export given up is priced at 4.0p. About 1486 kWh a year of the charge is treated as spare solar from 4 kWp that might otherwise have been exported. Delivered energy is about 2340 kWh. After charging cost and lost export, the figure saves about £438 a year. Set that against £6,880 fitted, which is a September 2026 illustration at the temporary 0% residential rate, not a quote. That is a simple payback of about 15.7 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 £6,880 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 SolaX Triple Power for a backup brief in Derby
In Derby, on National Grid Electricity Distribution, 3.6 kW is in the band where G98 connect-and-notify is often enough. Export can still be capped. Agree that before the inverter is ordered. The figure uses 10 kWh and 4 kWp, which is enough to tell two quotes apart if they assumed something else.
In Derby, the weak case for SolaX Triple Power is simple: Households whose priority is a widely recognised backup brand and a large certified-installer network.
Would I proceed with SolaX Triple Power for a backup brief in Derby?
I would not treat backup as included on a 10 kWh quote unless the circuits are listed.
I would proceed on SolaX Triple Power for a backup brief in Derby only after the cupboard, the 3.6 kW connection route and the tariff gap are written down.
Common questions
Is the price on this page a quote?
No. £6,880 is a September 2026 illustration for a 10 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 10 kWh example the inverter is 3.6 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 £6,880 job, that folder is part of what you bought.
What if the cheap rate is not 7p?
Then the figure changes. This page used 11.0p as a charge rate and 26.0p 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.