We get asked about off grid power more than almost anything else at the moment.
Usually it comes from one of two places. Either someone has a plot or a steading somewhere out past Maybole and the connection quote from the network operator has made their eyes water, or they have read something online about energy independence and want to know if it stacks up in Scotland.
Both are fair questions. Here is a straight answer to both, without the sales pitch.
First, most people who say "off grid" do not actually mean off grid
This matters more than anything else in this article, so it goes first.
There are two very different systems that get talked about as if they are the same thing.
Grid tied with battery storage. You stay connected to the network. Solar panels feed the house, surplus charges a battery, and anything left over gets exported. When the battery is empty and the sun is down, you draw from the grid as normal. Most systems fitted in Ayrshire are this type.
True off grid. There is no network connection at all. Everything the property uses has to be generated and stored on site, every day of the year, including the third week of a wet December.
The first one is a fairly routine job. The second one is an entirely different engineering problem, and the difference in cost between them is not small.
If your main goal is lower bills and some protection against power cuts, you want the first. If you have no supply and getting one would cost more than the system itself, the second becomes worth looking at properly.
The Scottish winter is the whole design problem
Solar works perfectly well in Ayrshire. On a clear day in June a well positioned array will produce more than most households can use. That is not the issue.
The issue is that a system has to be sized for its worst month, not its best. In the south west of Scotland the gap between midsummer and midwinter output is enormous. Short days, low sun angle, and a lot of cloud coming in off the Firth all stack up in the same direction.
For a grid tied system this does not matter much. You just import more in winter and export more in summer, and it averages out.
For a true off grid system it matters completely. Sizing an array so that it can carry a house through December means installing far more panel capacity than that house will ever use in July. You end up with a system that is massively oversized for nine months of the year in order to just about cope for the other three.
This is why almost every genuine off grid installation we look at in this part of the country ends up including a generator. Not as a failure of the design, but as part of it. The solar and battery do the heavy lifting from roughly March to October, and the generator covers the shortfall in deep winter. It is far cheaper than trying to solve winter with panels alone.
Anyone who tells you that you can run a Scottish property entirely on solar and battery, all year, with no backup, is either selling you something very expensive or has not done the sums.
What actually drains an off grid system
The loads that cause problems are the ones that turn electricity into heat. Electric showers, immersion heaters, kettles, tumble dryers, storage heaters, electric hobs. A single electric shower can pull more than the entire rest of the house combined while it is running.
On a grid connection none of this is your problem, because the network absorbs it. Off grid, every one of those loads has to come out of a battery you paid for.
This is why off grid design almost always starts with heating and hot water rather than with panels. Properties that work well off grid tend to have their heating and hot water handled by something other than electricity. In rural Ayrshire that is often oil, LPG or a wood burner with a back boiler, which is already common in the older housing stock out here.
If you are planning a new build on a remote plot, this is a decision worth making at design stage rather than after the walls are up. Changing a heating strategy on paper costs nothing. Changing it later costs a great deal.
Questions worth asking before you commit
A few things that come up on nearly every off grid job and rarely get mentioned in the brochures. If you are getting quotes, these are the ones to raise.
How is it being earthed? With no network supply coming in, an off grid system needs its own earthing arrangement sunk into the ground on site. Ground conditions decide how straightforward that is, and rock close to the surface is not unusual around here. Make sure it is in the quote rather than discovered on the day.
What can it run at once? Battery capacity tells you how much energy you can store. The inverter tells you how much you can draw at any one moment, and they are not the same thing. Get the second one wrong and the system trips out every time the kettle and the shower come on together, even on a full battery. Ask what happens when several things run at once.
Where is the battery going? Batteries need somewhere that stays within a sensible temperature range and meets the ventilation requirements. An uninsulated outbuilding that drops below freezing in January is not suitable, and cold batteries lose capacity exactly when you need it most.
Who is certifying it? Off grid work still falls under the wiring regulations in full. It still has to be designed, installed, inspected, tested and certified properly, and you should receive that certification. Being away from the network does not put you outside the rules, and your insurer will take the same view.
Does the payback figure include export income? A true off grid system exports nothing, so there is no Smart Export Guarantee payment. If the payback calculation you have been shown includes export earnings, you are looking at a grid tied calculation, not an off grid one. That is worth spotting before you sign.
What it actually costs
Most articles on this subject avoid the numbers. Here they are.
A full off grid setup, meaning solar, battery storage and a backup generator, typically comes in between £28,000 and £45,000 for a domestic property.
That splits roughly as follows. A working array of 15 to 25 panels runs from £9,000 to £14,000. Battery storage is £11,000 to £22,000, and where you land in that range depends almost entirely on how much you want to store. A reliable backup generator adds £4,000 to £7,000.
Those are our figures for Ayrshire, correct as of August 2026, and they are ranges rather than prices for a reason. Every property is different. A steading with a long run out to a ground mounted array is not the same job as a new build where the whole thing is designed in from the start.
The battery is where the range is widest, and it is also where the earlier point about heating earns its keep. Take the electric heating and hot water out of the equation and you can often drop a size band on storage, which is thousands rather than hundreds. That decision is worth making before anyone quotes you for panels.
One more thing to weigh. A generator is not an admission of defeat, it is the cheap part of the system. Trying to solve a Scottish December with panels and batteries alone will cost far more than the £4,000 to £7,000 a generator costs, and buys you capacity you will not use from March onwards.
When off grid genuinely makes sense
Being honest about this: for most homes in Ayr, Kilmarnock, Prestwick or Troon that already have a perfectly good supply, going fully off grid is not the sensible option. Solar with battery storage on a grid connection will do more for your bills and your resilience for a fraction of the outlay.
Off grid earns its place when the alternative is worse. A remote plot where the network connection quote runs into tens of thousands. An outbuilding, workshop or holiday let where trenching a supply across a field is impractical. A steading conversion where the existing supply is nowhere near adequate and upgrading it means a long and expensive cable run.
In those situations the comparison is not off grid against cheap grid electricity. It is off grid against a very large connection bill, and once a network quote runs past the £28,000 to £45,000 range above, the sums start pointing the other way.
Where to start
If you are weighing this up, the useful first step is not a quote for panels. It is an honest assessment of two things: what the property actually uses across a full year, and what a network connection would genuinely cost if you went that route.
Once those two numbers exist, the decision usually makes itself.
We cover Ayrshire as a whole, from Largs down through Ayr and Girvan and inland to Cumnock and beyond, and we are happy to have that conversation before anyone commits to anything. If off grid is the wrong answer for your property we will tell you so.
We are SELECT approved and a Which? Trusted Trader, with over 15 years in the trade behind the advice.
Get in touch and we will talk it through.
