Chelmsford · 2026 Local Guide

Chelmsford Solar Guide: Marconi’s City, Longfield’s Neighbour & 10 Verified Installers

10 MCS-certified firms for Chelmsford, Springfield, Great Baddow, Writtle, Broomfield and the CM1–CM3 villages.

Chelmsford was home to Marconi’s first wireless factory and became a city in June 2012. It is still growing, with the new Beaulieu Park station opening in October 2025 to serve the estates north-east of the centre. Just beyond them, between Boreham and Hatfield Peverel, the Longfield Solar Farm, of up to 500MW, has national consent.

This guide is written for Chelmsford. A 4kW roof here is estimated to produce 4,131 kWh a year, and at the Eastern price cap each unit you use yourself saves 26.61p. Chelmsford has an unusually strong local market: below are ten MCS-certified installers, three of them within a mile of the city centre, each checked against the MCS listings and its own site or register entries.

TL;DR: A 4kW system in Chelmsford is estimated to produce about 4,131 kWh a year, worth roughly £760–£875 a year at Eastern price-cap rates, paying back in about 7.4–8.5 years on a typical £6,490 install. The city’s 26 conservation areas need a planning check first.

4,131 kWh4kW output in Chelmsford

26.61pLocal unit rate (Q4 2026)

£760–£875Value per year

0% VATUntil 31 Mar 2027

At a glance: Chelmsford solar installers compared

Company	Accreditation	Services	Coverage	Years	Best for
Solar Panels Funded	MCS network	Quote matching, solar PV, battery, panel cleaning, funding guidance	Chelmsford, CM1–CM3	—	One enquiry → multiple local quotes
Nanopro-tech Ltd	MCS (NAPIT)	Solar PV, battery, EV	Chelmsford (CM2), under 1 mile	—	A highly reviewed city-centre installer.
OJF Electrical Ltd	MCS (NAPIT), RECC	Solar PV, battery, diverters, EV	Chelmsford (CM1/CM2), under 1 mile	—	Buyers who put reviews and consumer protection first.
EPC Improvements Ltd	MCS (NAPIT), RECC, TrustMark, FCA	Solar PV, Powerwall, heat pumps, MVHR	Chelmsford (CM1), ~1 mile	10+ years	Whole-house upgrades with solar, a heat pump and finance.
Houghton & Son Ltd	MCS (NICEIC), TrustMark, ISO 9001	Solar PV, optimisers, battery	Sandon (CM2), ~4 miles	—	Shaded roofs and older or heritage properties.
CT Solar Ltd	MCS (NAPIT), TrustMark	Solar PV, battery, EV, maintenance	Chelmsford (CM1), under 1 mile	—	A personal service from a small local firm.
Array Electrics Ltd	MCS (NICEIC), RECC, Which?, TrustMark	Solar PV, battery	Boreham (CM3), ~4 miles	Since 2015	Buyers who want a long list of independent accreditations.
Solar Hub Ltd	MCS (IAA)	Solar PV, battery, maintenance	Howe Street (CM3), ~5 miles	—	Homes in the villages north of Chelmsford.
CB Renewable Energy (Carmichael-Browns Ltd)	MCS (NAPIT), RECC, IWA	Solar PV, battery, thermal, heat pumps	Little Baddow (CM3), ~5 miles	30+ years (engineering)	Homes and small businesses wanting engineering-led design.
Expert Solar (UK Sustainability Group Ltd)	MCS (NAPIT), RECC	Solar PV, battery, maintenance	East Hanningfield (CM3), ~6 miles	400+ installs	Buyers who don’t want to pay a deposit.
First Solar PV Ltd	MCS (NAPIT), RECC	Solar PV, battery, EV	Bicknacre (CM3), ~6 miles	—	Homes south-east of the city around Danbury and Bicknacre.

MCS numbers checked 6 October 2026 against the MCS installer listings (via Find Certified Installers), with services and accreditations checked on each firm’s own site and the RECC, TrustMark, Which? and Checkatrade listings where available. Review figures are the ones shown on those listings. Membership can change, so confirm MCS status with the installer before you sign.

Solar in Chelmsford by the numbers

These figures are modelled for Chelmsford itself. A 4kW system facing south at 35° is estimated to produce 4,131 kWh a year, peaking at about 500 kWh in July and dropping to 145 kWh in December.

161

214

350

462

489

499

500

452

388

276

194

145

JanFebMarAprMayJunJulAugSepOctNovDec

4,131 kWh / yearEstimated output of a 4kW roof system in Chelmsford
26.61p per kWhPrice-cap unit rate for Chelmsford’s region (Eastern), Oct–Dec 2026, vs 26.32p GB average
£440–£660 off your billIf you use 40–60% of what the panels make at home
+ £215–£320 export incomeThe rest sold at 13p/kWh on an open Smart Export Guarantee tariff

That is worth roughly £760–£875 a year, paying back a £6,490 install in about 7.4–8.5 years. Chelmsford’s output is almost identical to Braintree’s and slightly ahead of Brentwood and Harlow.

Sources: output from the EU’s PVGIS 5.3 model (SARAH-3 data) for Chelmsford, 4kW, 35° south-facing, roof-mounted, 14% system losses. Unit rate from Ofgem’s price cap for 1 Oct–31 Dec 2026. Export rate: Fuse Energy Single Rate Variable, September 2026. Installed cost: Sunsave, August 2026. Your own figures will depend on roof direction, shading and how much electricity you use in daylight.

Areas covered around Chelmsford

This guide covers the CM1, CM2 and CM3 postcode districts: Broomfield, Springfield, Writtle, Great Waltham, Chelmer Village and Beaulieu Park in CM1; Great Baddow, Moulsham, Galleywood, Sandon and Danbury in CM2; and Boreham, Little Baddow, the Hanningfields and South Woodham Ferrers in CM3. Most of the installers below are in the city itself or on its rural edge at Sandon, East Hanningfield, Howe Street, Little Baddow, Boreham and Danbury.

SpringfieldGreat BaddowMoulshamWrittleBroomfieldGalleywoodChelmer VillageBeaulieu ParkBorehamDanburyLittle BaddowGreat Waltham

Parishes and wards from postcodes.io (CM1, CM2, CM3) and Wikipedia. CM3 also reaches into Braintree and Maldon districts.

Planning and grid connection in Chelmsford

26 conservation areasIn the city they include Chelmsford Central, Moulsham Street, New London Road, West End, Springfield Green, Baddow Road and River Can; outside it, Great Baddow, Writtle, Broomfield, Boreham and Danbury. Panels on a wall or roof facing a highway in them are not permitted development.
Listed buildingsAny listed building needs listed building consent before panels go on. The council points owners to Historic England’s list to check a property.
Article 4 directionsThe council notes that Article 4 directions can remove permitted development rights. Ask its planning team whether one covers your street.
Permitted development elsewhereOutside those areas, most homes can fit roof panels without planning permission if they sit within 200mm of the roof slope and below the ridge.
UK Power NetworksChelmsford is on UK Power Networks’ Eastern network. Most home systems are notified after installation (G98); larger ones need approval first (G99).

Sources: Chelmsford City Council (conservation areas, listed buildings, working in a conservation area); HEAT Essex; Planning Inspectorate (EN010118 Longfield Solar Farm); Wikipedia (Chelmsford, City of Chelmsford, Marconi Company); Energy Networks Association; GOV.UK permitted development rules.

Solar Panels Funded

SPFBirmingham · serving Chelmsford & mid Essex

MCS networkResidential & commercialFunding specialists

Solar Panels Funded is a Birmingham-based solar intermediary at Digbeth Court Business Centre, 162–164 High Street, Birmingham, B12 0LD. It doesn’t install panels itself; it matches Chelmsford homeowners with MCS-accredited installers from its network, so one enquiry brings back several quotes.

With so many installers in and around the city, it can help you compare like for like, flag conservation-area streets early, and check whether HEAT Essex funding might apply.

Get your free Chelmsford quote →

Best for One enquiry → multiple competitive quotes from vetted MCS-accredited installers.

Nanopro-tech Ltd

NPCriterion House, 40 Parkway, Chelmsford CM2 7PN

MCSNAPITAward-winning

Nanopro-tech works from Parkway in the city centre and installs solar PV, battery storage and EV chargers. It was named Solar PV Installer of the Year for Greater London in the 2023 Energy Efficiency Awards.

Its MCS listing shows 5.0 from 95 reviews, one of the strongest local records. Ask which panel and battery brands it would use, as its site doesn’t name them.

Best for A highly reviewed city-centre installer.

OJF Electrical Ltd

OJUnit 203 Waterhouse Business Centre, Chelmsford CM1 2QE

MCSNAPITRECC

OJF Electrical and Renewables installs solar PV, batteries, energy diverters and EV chargers across Chelmsford, Colchester, Brentwood, Billericay, Witham, Braintree and Basildon. It is a RECC member, so deposits and contracts follow the RECC code.

Its MCS listing shows 5.0 from 115 reviews, the biggest record on this list. Its MCS address is in Burns Crescent, CM2, rather than its business centre.

Best for Buyers who put reviews and consumer protection first.

EPC Improvements Ltd

EP15–17 Russell Way, Chelmsford CM1 3AA

MCSNAPITRECCBUS registered

EPC Improvements says it has more than ten years in renewables and over 1,700 installations, with projects in Chelmsford, Maldon, Brentwood and Witham. It fits solar PV, Tesla Powerwall 3, Stiebel Eltron and Mitsubishi heat pumps and MVHR ventilation, and is FCA-authorised to arrange finance.

Its MCS listing shows 4.6 from 79 reviews, and its own site quotes 4.69 from 182.

Best for Whole-house upgrades with solar, a heat pump and finance.

Houghton & Son Ltd

HSGrove Farm, East Hanningfield, Sandon, Chelmsford CM2 7TP

MCSNICEICTrustMarkISO 9001

Houghton & Son is a family-run building and renewables firm at Sandon, south-east of the city, that also does heritage work. For homes it designs string-inverter systems with DC-coupled batteries, SolarEdge optimisers for shaded roofs and AC-coupled retrofit batteries, using brands such as SolarEdge, myenergi, Fox, GivEnergy and Enphase.

Its MCS listing shows 4.8 from 65 reviews, and it holds CHAS Elite and Living Wage Foundation accreditation.

Best for Shaded roofs and older or heritage properties.

CT Solar Ltd

CT18 Hoffmanns Way, Chelmsford CM1 1GU

MCSNAPITTrustMark

CT Solar is a city-centre installer whose managing director says he has more than a decade of experience and handles clients personally. It installs solar PV, batteries, EV chargers and air-source heat pumps, and maintains existing panels.

Its MCS certificate is fairly new and we found no independent reviews, so ask for references.

Best for A personal service from a small local firm.

Array Electrics Ltd

AR7a Drakes Lane Industrial Estate, Boreham CM3 3BE

MCSNICEICRECCWhich? Trusted Trader

Array Electrics was established in 2015, trading as A P Electrical (Essex) until 2023, and works from Boreham. It installs residential solar, lists Tesla as a partner and says it has more than 500 customers.

It holds an unusually wide set of accreditations, including RECC, TrustMark, Which?, CHAS, ECA and SafeContractor. We found no review count to quote.

Best for Buyers who want a long list of independent accreditations.

Solar Hub Ltd

SHUnit 8 The Courtyard, Warners Farm, Howe Street, Chelmsford CM3 1BL

MCSIAA

Solar Hub works from Howe Street near Great Waltham, north of the city, installing residential and commercial solar, batteries and maintenance across Essex, Hertfordshire and London. It claims more than 4,000 completed projects.

The company itself was incorporated recently and we found no independent reviews, so ask how its warranties are backed.

Best for Homes in the villages north of Chelmsford.

CB Renewable Energy (Carmichael-Browns Ltd)

CBThe Becquerel Centre, Knole Cottage, Common Lane, Little Baddow CM3 4RY

MCSNAPITRECCIWA

CB Renewable Energy draws on more than 30 years of commercial engineering experience and installs domestic solar with batteries, solar thermal and heat pumps, as well as commercial PV and voltage optimisation. It also offers fully funded commercial solar.

It is a RECC member and IWA-approved installer. We found no published reviews.

Best for Homes and small businesses wanting engineering-led design.

Expert Solar (UK Sustainability Group Ltd)

ESUnit 21 East Hanningfield Industrial Estate, Old Church Road, East Hanningfield CM3 8AB

MCSNAPITRECCInsurance-backed

UK Sustainability Group trades as Expert Solar from East Hanningfield and says it has installed more than 400 systems. It offers no-deposit installs, an insurance-backed guarantee, a price-match promise and two years of free maintenance.

It is a RECC member and its site quotes a 4.8 Google rating without a count.

Best for Buyers who don’t want to pay a deposit.

First Solar PV Ltd

FSOakview, Leighams Road, Bicknacre, Chelmsford CM3 4HF

MCSNAPITRECC

First Solar PV is a long-standing Danbury-area installer covering London and the South East, with MCS certification for solar PV, batteries and EV charging and RECC membership.

Its MCS listing shows 5.0 from eight reviews. Its website still refers to the Feed-in Tariff, which closed in 2019, so ask for savings worked out on today’s export rates.

Best for Homes south-east of the city around Danbury and Bicknacre.

Frequently Asked Questions

Can I get help paying for solar in Chelmsford?

Chelmsford is among 13 Essex councils taking part in HEAT Essex. Happy Energy Solutions delivers that Warm Homes: Local Grant programme, and solar PV is one of the upgrades it can pay for. You don’t have to claim benefits: income, health, the property and its EPC are all weighed up. Demand has been very high, and in October 2026 HEAT Essex warned that some applications might be put on hold, so apply early on 01206 326808.

Which parts of Chelmsford are conservation areas?

There are 26 across the council area. In the city they include Chelmsford Central, Moulsham Street, New London Road, West End, Springfield Green, Baddow Road and River Can, and in the villages Great Baddow, Writtle, Broomfield, Boreham and Danbury. In those areas, panels on any roof slope or wall that faces the road need planning permission first.

What is the Longfield Solar Farm?

It is a nationally significant solar and battery project of up to 500MW, planned on farmland just north-east of the city, beyond the A12 and stretching from Boreham towards Hatfield Peverel. Consent was granted on 26 June 2023, with an amendment order in February 2026. It is separate from home solar and has no effect on your own roof or export payments.

Can I join a group-buying scheme for solar in Chelmsford?

Yes. Essex County Council has partnered with iChoosr on Switch Together (previously called Solar Together). Households across the county register, then approved installers bid in an auction. Sign-ups for panels and batteries were open in October 2026; it costs nothing to register and you are free to turn the offer down.

Why are there so many solar installers in Chelmsford?

Chelmsford has one of the busiest local markets we’ve seen. Nanopro-tech, OJF Electrical and CT Solar are all within a mile of the centre, and several more work from Sandon, Boreham and the Hanningfields. That makes it easy to get three or four genuinely local quotes.

How much will panels generate on a Chelmsford roof?

In Chelmsford, PVGIS estimates that 4kW of panels facing due south and pitched at 35° would produce roughly 4,131 kWh annually. That is close to Braintree and a touch above Brentwood. July is the peak, at around 500 kWh, while December manages about 145 kWh.

How much would a Chelmsford household save with solar?

For the last quarter of 2026 the Eastern price cap is 26.61p per kWh. Run the house on 40–60% of its own solar output, export what’s left at 13p, and you would be about £760–£875 a year better off; at that rate a £6,490 installation is cleared in roughly 7.4–8.5 years.

Final Thoughts

In Chelmsford, check whether you are in one of the 26 conservation areas or a listed building before booking surveys; if so, talk to the city council’s planning team. Elsewhere, most roofs can go ahead under permitted development.

With so many local firms, get at least three quotes and compare each installer’s output estimate with the 4,131 kWh figure above. Register with HEAT Essex and Switch Together if cost is the main barrier.