3 kW · Starter
From £4,500
- 8–10 panels
- ~2,500 kWh/year
- ~£400–600 saved/yr
- 25-yr panel warranty
Typical bill cut: 20–40%
Get a quote for this →Energy systems, properly engineered.
Solar, batteries and heat pumps for homes and businesses across Bedfordshire, Hertfordshire and Buckinghamshire.
For homes & for business
Two paths through the same engineering team.
Pick whichever fits — the survey, the kit and the quote come from the same people either way.
* Indicative annual benefit across our installed base, using South-East England yield assumptions and a typical 5 kWp system. Your figure will vary by roof, usage, and battery.
For homes
Three packages. Honest numbers.
Same engineering team, three sizes. Pricing matches our residential page — no “from” trickery.
Most popular
4 kW · Recommended
From £5,500
- 10–12 panels
- ~3,400 kWh/year
- ~£500–900 saved/yr
- 25-yr panel warranty
Typical bill cut: 25–50%
Get a quote for this →
6 kW+ · Independence
From £7,500+
- 15+ panels
- ~5,100 kWh/year
- ~£700–1,200 saved/yr
- Battery-ready, EV-ready
Typical bill cut: 35–65%
Get a quote for this →Finance available from £82/month with 0% deposit. Prices include 0% VAT until March 2027. Battery storage quoted separately — see options.
Recent work
Three projects. Real numbers.
No hypotheticals, no marketing maths — the kWh, the savings, the payback, exactly as the customer sees them.
Solar PV · 250kW · Bedford
A warehouse paying itself back in 4.2 years
£42,000 in annual savings. 65% of site demand offset. Now 18 months in.
Read the project
EV charging · 24 points · Milton Keynes
A 24-point EV hub, fully WCS-funded
Smart load management across the site. Tenants now charge at cost.
Read the project
Solar + Battery · 85kW · Hertfordshire
Solar + battery for a hotel that never sleeps
85kW solar, 100kWh battery, backup power for the kitchens.
Read the project
“Fifteen years, three thousand systems, one team. We’re not disappearing after handover — just call when you need us.”
James · Founder, MJ Renewables
We know your patch
How many MJ systems are near you?
Pop in your postcode — we’ll show you nearby projects, indicative savings for the kind of homes around you, and what local customers say.
Honest numbers
What might it look like for a home like yours?
Three typical UK households, modelled with the same maths as our calculator — conservative South-East yields, no rosy assumptions.
| Monthly bill | Typical system | Yearly saving solar only |
Yearly saving with battery |
Payback |
|---|---|---|---|---|
| £80 | 3–4 kW | ~£400 | up to ~£600 | 6–14 yrs |
| £150 | 4–5 kW | ~£700 | up to ~£1,150 | 4–10 yrs |
| £250 | 6–8 kW | ~£1,200 | up to ~£1,950 | 4–9 yrs |
Assumes 900 kWh/kWp/year, 28p import, 40–65% self-consumption. Real quote depends on your roof, usage, and panel choice.
- £80/mo bill~£400–600 saved/yr
- £150/mo bill~£700–1,150 saved/yr
- £250/mo bill~£1,200–1,950 saved/yr
How we work
Three steps. No surprises.
Site survey
Free, thorough, and honest about whether we’re the right fit.
Fixed quote
Design, savings, applicable grants. The price quoted is the price paid.
Install & aftercare
Our own team, not subcontractors. We’re here for the lifetime of your system.
Should you add a battery?
Solar on its own — or solar plus storage.
Two honest scenarios. The right answer depends on when you actually use power.
Solar only
Daytime cover, exported surplus
- 40–50% self-consumption
- Surplus exported at 5–15p/kWh (SEG)
- No backup during outages
- Lower upfront cost
Best when most of your usage — cooking, washing, EV charging — falls in daylight hours.
Solar + battery
Evening cover, peak-tariff savings
- 65–80% self-consumption
- Stored daytime power covers peak evening tariffs
- Backup power options for outages
- Adds £3k–£10k+ depending on capacity
Best when most of your usage is in the evening, or when you want resilience.
What customers say
Words from people who’ve had us round.
★★★★★
They turned down a quote on our second house because the roof angle wasn’t right. That’s when I knew we were dealing with the right people.
★★★★★
Quote was the price. Install was clean. App was working before they left. Two years on and they still answer the phone.
★★★★★
Three quotes, one straight answer. James walked us through the maths, no hard sell, and we’ve had eighteen months of bills under twenty quid.
Quick answers
The questions everyone asks first.
Do I need planning permission?
For most homes, no — rooftop solar falls under permitted development. Listed buildings, conservation areas, and some flat-roof installs are the exceptions, and we’ll flag any concerns in the survey before you commit. More on planning →
What if my roof has shading?
Shading hits output, but rarely kills a project. Panel-level optimisers and a careful design around chimneys, dormers, and trees usually recover most of the loss. We model your specific roof during the survey — if the numbers don’t work, we’ll tell you.
Are you MCS-certified?
Yes — MCS, RECC, TrustMark, NAPIT, and Tesla Powerwall Certified. The full list of accreditations sits at the top of the page and in our footer. MCS is a hard requirement if you want to claim SEG export payments, so don’t skip checking this with any installer.
What warranties do you offer?
Panels carry a 25-year manufacturer performance warranty, inverters typically 10–12 years, batteries 10 years, and our workmanship is guaranteed for 5 years. We’re still here for the full lifetime of your system — just call when you need us.
Can I pay in instalments?
We’re installers, not lenders, so we don’t broker finance ourselves. Many customers pay outright; others use a home-improvement loan or remortgage. We’ll happily talk through what we’ve seen work for similar households — no commission either way.
How long from quote to install?
Typically 4–8 weeks from accepted quote to switch-on, depending on equipment lead times and DNO sign-off. We’ll give you a real date during the survey, and update you if anything slips — no “a few weeks” vagueness.
More questions? Call James on 07944 275171 — happy to talk it through.
Ready when you are
Get a quote.
Usually back within a working day. No hard sell, no door-to-door pressure.
Start with your postcode → Call 07944 275171
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