What solar actually generates at this latitude, what it saves against 2026 electricity and export prices, what it costs to install, and the four cases where it is not worth doing.
For most homes, solar panels in South Yorkshire do pay for themselves, and the region is nowhere near as poor for generation as people assume. A south-facing kilowatt of panels here produces roughly 900 to 950 kWh a year. What decides whether it is a good buy is not the sunshine, it is how much of that electricity you use yourself instead of exporting.
This is a numbers piece rather than a sales pitch. Below are the 2026 figures for generation, savings, installed cost and payback, what the VAT position is, and the practical things an electrician sees go wrong on solar jobs. Where a figure is a market average rather than a price from us, it says so.
What solar panels in South Yorkshire actually generate
The doubt people raise first is latitude. We are at roughly 53 degrees north, and the assumption is that anything above the Midlands is a waste of money.
The measured answer is that an unshaded, south-facing array pitched at about 35 degrees in this region yields in the order of 900 to 950 kWh for every kWp installed, each year.
The sunniest parts of the south coast manage something like ten per cent more. That difference is real, but it is not the difference between a sensible investment and a silly one.
Real roofs come in lower than the ideal, and it is worth knowing why before you read anyone's quote:
Orientation. A house whose ridge line runs east to west gives you one broad south pitch, which is the best case. A ridge running north to south leaves you an east pitch and a west pitch instead. That is still perfectly workable, and it has a hidden advantage: generation spreads across the morning and the late afternoon rather than piling into the middle of the day, which tends to raise the share you actually use.
Shading. A single chimney, a neighbouring gable or a mature tree over one corner costs more than its shadow suggests, because of how panels are wired in series. Good design works around it. A cheap design ignores it.
Pitch and roof space. Shallow pitches lose a little; a roof broken up by dormers or velux windows limits how many panels physically fit.
Put together, a 4 kWp system on an ordinary house around here typically lands somewhere between 3,100 and 3,500 kWh a year rather than the 3,700 the perfect case implies.
What that saves you in 2026 money
Solar pays you in two quite different currencies, and confusing them is the single most common reason a quote looks better on paper than it turns out in practice.
The first is electricity you no longer buy. Under the price cap that took effect on 1 July 2026, a unit of electricity costs 26.11p, with the next review due on 1 October.
The second is electricity you export, paid for under the Smart Export Guarantee. Advertised SEG rates in 2026 run from about 3p to 25p per unit, the average sits around 13p, and 15p is the best widely available fixed rate without strings attached.
So a unit you consume in your own house is worth roughly double a unit you sell. Everything about whether solar is a good deal for you follows from that one fact.
Take the middle of the range above, a 4 kWp array producing 3,400 kWh a year, with no battery. A household that is out on weekdays typically consumes about 35 per cent of what it makes:
1,190 kWh used at home, at 26.11p, is about £311 a year off the bill.
2,210 kWh exported, at 13p, is about £287 a year paid back to you.
Call it £600 a year in round terms.
Shift that self-consumption figure and the whole picture moves. Someone at home in the day, running the washing machine and the dishwasher at lunchtime rather than at ten at night, might reach 50 per cent and take the annual figure noticeably higher without adding a single panel.
What it costs, and the VAT deadline worth knowing about
Typical market figures for 2026, not FRM prices: a 4 kW system with panels and inverter runs from about £5,500 to £8,500 installed. Add battery storage and the same job lands somewhere between £9,500 and £14,000, depending on the capacity and how the inverter is arranged.
Against that, £600 a year on a £7,000 system is a payback of a little under twelve years, on panels that are expected to keep generating for decades after that. It is a slow, dull, reliable return rather than a windfall, and it holds up better than most things paying interest.
The VAT position has a date on it. Domestic installations of energy-saving materials are zero-rated until 31 March 2027, after which the plan is a return to the reduced rate of 5 per cent.
The zero rate covers the whole job when it is supplied as one contract, panels, inverter, battery, scaffolding, cabling and labour, and it has applied to batteries fitted on their own since February 2024.
Be careful how that is sold to you. Going from zero to five per cent is a five point change, so on a £10,000 installation the relief is worth in the region of £500. It is worth having, and it is a reason not to dawdle if you were going ahead anyway. It is not the 20 per cent saving that some advertising implies.
Where a battery actually earns its keep
Here is the part that gets glossed over. On the arithmetic above, adding a battery does not shorten your payback. It lengthens it.
A battery lifts self-consumption from something like 35 per cent to around 75 per cent. On the same 3,400 kWh, that is roughly £666 saved on the bill and £111 of export income, about £777 a year. Better, but the battery added several thousand pounds to get there, so simple payback stretches out rather than shrinking.
What changes the answer is the tariff. A battery is not really a solar accessory, it is a way of buying electricity when it is cheap and using it when it is dear, and the flexible tariffs now on offer make that a much bigger lever than the solar itself.
At the time of writing, one widely used tariff charges around 9.8p a unit in the small hours and pays about 28.6p for exports during the late afternoon peak. Fill a battery overnight at the low rate and you are running the evening on cheap units regardless of whether the sun came out.
That is the honest case for storage: tariff arbitrage first, more of your own solar second, and keeping the freezer running through a power cut third, if it is configured to do that. Anyone selling you a battery purely on the strength of solar savings is showing you the weakest of the three arguments.
When it is not worth it
Four situations where the answer is genuinely no, or not yet.
An empty house all day, no battery and a fixed tariff. You will export the bulk of it at half the value and the return drags out badly. Fix the tariff and the storage first, then revisit.
A heavily shaded or badly broken-up roof. If the usable area only takes a handful of panels, the fixed costs of scaffolding, design and commissioning are spread over too little generation.
A low-consumption household. Solar saves you money in proportion to the electricity you would otherwise have bought. A frugal one or two person home simply has less to displace.
A roof that needs work. Panels have a life measured in decades and you do not want to pay to strip and refit them in five years because the felt or the battens were already at the end. Sort the roof, then the panels.
Planning, your network operator and MCS
Three pieces of admin decide how quickly a job can actually happen.
Planning. Roof panels on a house are usually permitted development, provided they sit close to the roof slope and do not rise above the highest part of the roof. Two exceptions catch people out. A listed building always needs listed building consent, whatever the panels look like.
In a conservation area, a slope facing the highway will generally need a planning application even where a rear slope would not. Rotherham, Barnsley and Doncaster councils will each confirm the position for a specific address, and it is a free question worth asking early.
Your network operator. Anything that generates into the grid has to be registered with the regional distribution network operator. Systems up to 3.68 kW per phase go through the simpler G98 route, where the installer notifies the operator within 28 days of commissioning, so the work is not held up.
Above that threshold it becomes a G99 application, which has to be approved before installation, and a connection offer can take up to 45 working days. If you are planning a larger array, start that clock early rather than booking scaffolding first.
MCS. This is the one with money attached. To claim SEG payments you need the equipment and the installer to be MCS certified, and you need a smart meter capable of recording your exports half-hourly. Suppliers ask for the certificate when you sign up. An installation without it still generates, but the export half of the return above disappears.
What goes wrong, from an electrician's point of view
Solar is sold as a roof product. Most of what fails on it is electrical, and it sits below the roof rather than on it.
The DC side deserves more respect than it gets. Panels produce a voltage as soon as there is daylight on them, and it cannot be switched off at a consumer unit. Rooftop connectors that have been crimped badly, mismatched connector brands mated together, and isolators that have let water in are all well known sources of arcing faults, and they are exactly the sort of thing a proper commissioning test and a periodic inspection are meant to pick up.
Inside the house, the usual sticking point is the board. An older consumer unit often has no spare way, or lacks the type of protection a modern inverter and battery need, so the solar quote quietly assumes work that was never priced. If yours is dated, our page on fuse board replacement and consumer unit upgrades covers what that involves before it becomes a surprise line on an invoice.
The other one is export configuration. If the system is set up wrong, or the meter is not communicating, you can generate happily for a year and be paid for none of it. It is worth checking your first few statements rather than assuming.
FRM Electrical designs, installs and commissions solar PV and battery storage in-house, as an NICEIC-accredited team working out of Wath upon Dearne. If you want a starting figure before you speak to anybody, the solar estimator gives an indicative ballpark from your own usage. We cover Rotherham, the Dearne Valley and the rest of the towns listed here, and we will tell you if your roof is not a good candidate.
Frequently asked questions
Do panels generate anything through a Yorkshire winter?
Yes, but not much of the annual total. Panels run on daylight rather than direct sun, so a grey December day still produces something, just a small fraction of a bright June one. The great majority of a year's generation arrives between March and September, which is why any honest estimate is quoted as an annual figure rather than a monthly one. Light snow usually slides off a pitched array once the panel surface warms.
Do I need to tell my home insurer?
Yes. Solar counts as a material alteration to the property, so tell your insurer once it is commissioned and keep the certification with your policy documents. Most insurers cover a roof array as part of the buildings policy without an extra premium, but that is their decision to make, not an assumption to leave untested.
What happens to the panels and the payments if I sell the house?
If you own the system outright it forms part of the property and passes to the buyer, along with the paperwork. The export arrangement does not transfer automatically: it is a contract in your name, so the new owner signs up in theirs, and you close yours on completion. Have the MCS certificate, the electrical certificate and the handover pack ready, because a buyer's solicitor will ask for them.
How long does the installation itself take?
The roof work on a typical domestic system is a day or two, with scaffolding going up beforehand and coming down after, so allow about a week end to end. Adding a battery usually adds a day. The longer part of the timeline is nearly always the paperwork described above rather than the labour.
Can I add more panels or a battery later?
Often, but it is not always the bargain it looks. Extra panels have to sit within the capacity of the existing inverter or need a second one, and increasing total output can push a system past the 3.68 kW per phase threshold, which turns a simple notification into an approval you have to wait for. Adding storage later is generally easier. If you think either is likely, say so at the design stage and have the system sized with the headroom built in.
Should I hold off in case prices fall?
Hardware has been getting cheaper for years and may well continue to. The difference is that one variable has a fixed date on it rather than a trend, and that is the VAT change noted above. Beyond that, waiting costs you a year of generation you cannot get back, which on the figures here is a few hundred pounds.
The bottom line
Solar in this region is a sound but unspectacular investment, and the deciding factor is your own routine rather than the weather. Work out honestly how much electricity you use during daylight, get a design that respects the shading on your actual roof, and treat the export rate as the smaller half of the return. Do those three things and the numbers above will hold up. Skip them and you will have bought a very expensive roof ornament.
