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SolaX Triple Power for a small terrace in Southampton
Updated
A small terrace in Southampton needs a cupboard that meets the SolaX Triple Power datasheet. Do not import a detached-house cabinet into Southampton just because the brand is familiar.
SolaX Triple Power on a small terrace in Southampton
Southern yield helps the annual figure. It does not retire the winter tariff, which is the constraint I would write next to SolaX Triple Power for this small terrace.
SSEN covers this Southampton example. A 4 kWp-class roof at 1040 kWh per kilowatt is about 3,120 kWh a year before shade, and SolaX Triple Power does not change that weather.
Money for SolaX Triple Power for a small terrace in Southampton
Take an 8 kWh pack, cycled about 320 times, at 90% round trip. Charge at 9.0p, and value what comes back at 29.6p. Export given up is priced at 10.0p. About 914 kWh a year of the charge is treated as spare solar from 2.5 kWp that might otherwise have been exported. Delivered energy is about 2304 kWh. After charging cost and lost export, the figure saves about £461 a year. Set that against £5,799 fitted, which is a September 2026 illustration at the temporary 0% residential rate, not a quote. That is a simple payback of about 12.6 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 £5,799 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 small terrace in Southampton
In Southampton, on SSEN, 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 8 kWh and 2.5 kWp, which is enough to tell two quotes apart if they assumed something else.
In Southampton, 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 small terrace in Southampton?
I would not compare a £5,799 headline with another until usable kWh and the fate of any existing inverter match.
I would proceed on SolaX Triple Power for a small terrace in Southampton 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. £5,799 is a September 2026 illustration for a 8 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 8 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 £5,799 job, that folder is part of what you bought.
What if the cheap rate is not 7p?
Then the figure changes. This page used 9.0p as a charge rate and 29.6p 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.