Places · Case file
Growatt for a existing solar in Wolverhampton
Updated
Keep a healthy solar inverter in Wolverhampton if you can. Swap to Growatt only when that inverter is finished, not because a Wolverhampton sales diagram prefers a hybrid.
Growatt on a existing solar in Wolverhampton
No garage means the datasheet has to be met indoors, not waved through because the street is ordinary, which is the constraint I would write next to Growatt for this existing solar.
National Grid Electricity Distribution covers this Wolverhampton example. A 4 kWp-class roof at 930 kWh per kilowatt is about 2,790 kWh a year before shade, and Growatt does not change that weather.
Money for Growatt for a existing solar in Wolverhampton
Take an 8 kWh pack, cycled about 300 times, at 90% round trip. Charge at 9.0p, and value what comes back at 28.4p. Export given up is priced at 8.0p. About 857 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 2160 kWh. After charging cost and lost export, the figure saves about £420 a year. Set that against £5,630 fitted, which is a September 2026 illustration at the temporary 0% residential rate, not a quote. That is a simple payback of about 13.4 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 £5,630 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 Growatt for a existing solar in Wolverhampton
In Wolverhampton, 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 8 kWh and 2.5 kWp, which is enough to tell two quotes apart if they assumed something else.
In Wolverhampton, the weak case for Growatt is simple: Buyers who will have no local support if the installing company is a short-lived lead-gen brand.
Would I proceed with Growatt for a existing solar in Wolverhampton?
I would not treat backup as included on a 8 kWh quote unless the circuits are listed.
I would proceed on Growatt for a existing solar in Wolverhampton 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. £5,630 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 £5,630 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 28.4p 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.