Off-grid power for homes the grid won't reach
No mains connection, or a connection quote that makes no sense? Complete solar, battery and generator systems, designed from your real loads by the engineer who installs them – and answers the phone afterwards.
Victron Energy authorised installer · BYD Battery-Box installer · 100+ off-grid systems since 2020
Watch two of the homes we’ve powered, filmed by Victron Energy ↓
Two of the homes we've powered – filmed by Victron Energy
Five-bed self-build barn conversion
A family who assumed the grid was close enough, until the quote arrived. Fully off-grid on solar, battery and backup generator.
Filmed and published by Victron Energy.
New-build timber-frame house
Viridian solar roof, BYD battery and Victron inverter. A few metres from a mains supply, and off-grid by choice.
Filmed and published by Victron Energy.
“In June 2016 Scott and his team installed my fully off-grid solar and batteries solution here at my grade two listed farmhouse. When he says he stands behind his clients for decades, that is absolutely true. The system (Victron and BYD batteries) has performed almost flawlessly over the ten years. Scott has helped admirably with my only real energy crisis last December – a dead battery sucking power from the rest of the stack. The battery was 9½ years old but with the data monitor readouts over the previous years he was able to get another on the guarantee. This is a man and a business that has integrity. I have increased my solar panel numbers over the years and will increase my battery storage in the future. This shows how flexible the systems can be in the right hands.”
Philip M., Carmarthenshire · System designed and installed by Scott in 2016, before Off Grid Engineering was founded; under OGE’s care since 2020.
Six years, a hundred-plus systems, one engineer
Since 2020
Off Grid Engineering Ltd, trading since January 2020 – designing and installing off-grid systems for longer than that.
100+
Complete off-grid systems installed, from Cornwall to Aberdeen – each one remotely monitored.
Cornwall to Aberdeen
We travel to the job. One engineer, one van, the same person from first call to commissioning.
Systems reporting to our remote monitoring – each dot is a home, farm or workshop we’ve powered.
Who this is for
A barn or cottage conversion
The connection quote came back at a number nobody expected. Off-grid stopped being the eccentric option.
A new build with no supply
A plot with no grid nearby. We can size the system from the drawings and, where the array is ground-mounted, have it running before the house is finished.
A house that is already off-grid
Running on an old system, or a generator that never seems to switch off. We replace it with something that just works.
When off-grid usually isn’t the answer: if the DNO will connect you for under about £15,000, take the connection – a grid-tied solar and battery system will cost less, and we’ll tell you so. It’s also not the right fit if you’re after a kit, a caravan or cabin system, or a budget under £25,000.
Worth knowing: if you do pay for a new connection, anyone who connects off it in the next ten years has to reimburse you a share – ask your DNO about the “second comer” rule.
What a complete system means
Every system we quote is the whole job, not a kit:
- Solar array – roof or ground mount, sized for December, not for the brochure
- BYD lithium battery – sized for days of autonomy, not just hours
- Victron inverter/charger – the heart of the system, remotely monitored
- Generator integration – auto-start, so it runs only when it has to
- Installation and commissioning – by the engineer who designed it
- Remote monitoring – we see what you see, and usually before you do
- Electrical Installation Certificate – to BS 7671 / Part P
A note on MCS: there’s no export tariff or grant on an off-grid home, so MCS certification doesn’t apply. What applies is BS 7671, Part P and a proper certificate – which every system leaves with.
How we design a system
1. Your real loads
Send us your plans and a list of what the house will run – heat source, cooking, water, EV if there is one. We turn that into a kWh-per-day figure for a winter week, not an annual average.
2. Your site's winter yield
We size the array for your postcode, pitch and orientation using PVGIS irradiance data. December is the month that decides it.
3. The generator's job
We size battery and array so the generator is backup, not the primary. We’ll tell you the hours-per-year band to expect – and it’ll be a real number.
Not ready to talk yet? Find out what size system you’d need — in two minutes
- Answer a few questions about your home — heating, hot water, cooking, appliances
- We send you a rough kWh/day figure, array size and battery size for the house
- No obligation, and no call unless you ask for one
An option worth knowing: get the power in before the build
Getting your generator and off-grid system in early can save months of generator hire during the build. Where the array is ground-mounted, the system doesn’t need a finished roof — on this site the array, plant room and generator went in first, and the build crew have run off it ever since. If you’re at planning stage, it’s worth a conversation.
What it costs
Most complete off-grid homes we design start from £24,000, and most land between £28,000 and £40,000 inc. VAT (currently 0% on qualifying residential installations until 31 March 2027).
What moves it: winter load, the days of battery autonomy you want, whether a generator is already on site, ground mount versus roof, and cable runs and groundworks.
For comparison, rural DNO connection quotes we see from clients commonly run £15,000–£40,000, and higher where a transformer or road dig is involved. Put your quote next to ours – that’s the honest way to decide.
No finance. No “save £X a year” promises. A well-designed system is about reliable power where the grid isn’t an option, and we’ll show you the real running costs – including battery and inverter replacement – before you sign anything.
Or call Scott on 03337 722659 · Systems from £24k
One engineer, start to finish
Off Grid Engineering is deliberately a one-engineer business. Scott Simpson – qualified electrician, 18th Edition, Part P – designs your system, installs it, and is the person who picks up the phone afterwards. No subcontract chain, no call centre, no sales team.
- Off Grid Engineering Ltd, trading since January 2020
- Victron Energy authorised installer – listed on Victron’s own “Where to buy”
- Manufacturer warranties on every component, stated in your quote
- Every system remotely monitored after handover
“We couldn’t be happier with our off grid solar installation by Off Grid Engineering. Scott has been excellent throughout and always answers the phone if we ever need minor advice as newbies to off grid living. They designed and installed a Victron off-grid energy system for us which was perfectly tailored to our needs, and the results have been great – reliable power, smart energy management, and complete independence from the grid. We have also extended this system with their help to improve efficiency further. I’d highly recommend them to anyone looking for a top-tier off-grid energy solution.”
Julian J., Woodbury, Devon · Off-grid barn, Victron system installed and later extended by OGE.
Let's price your system
Two quick steps. Tell us about the site first, then how to reach you. Scott replies personally with a written price for your system, the kit it covers and the three or four things that would move the figure.
Prefer to talk? Call Scott on 03337 722659 · Systems from £24k · Victron Energy authorised installer
Victron Energy authorised installer · BYD Battery-Box installer · 100+ off-grid systems installed across the UK since 2020 · Off Grid Engineering Ltd
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