Solar and battery for Watford homes, with a fixed price in writing
MCS and NAPIT certified. We measure your roof and put the price in writing, with nothing added later.
5.0 from 38 Google reviews · MCS certified · NAPIT registered · RECC member
0% VAT on solar and battery until 31 March 2027.
Pictured: our install in Welwyn Garden City, mid-install
“Called Depth of Light because I was having trouble with my electricity tripping when solar panels kicked in each morning. Matt came round within a few days and spoke with Solis. Between them the fault was identified and Matt came and fitted a new RCD. Fast, professional, friendly service. Would recommend.”
“Matt did an amazing job replacing our old fuse box! He was super clean, kept us informed every step of the way, and did a really professional job. We’ve used him for various other work since and we’ll definitely keep using his services again.”
Our nearest recent installs
What we find on Watford roofs
Victorian terraces
The streets close to the town centre are largely Victorian terrace: long, narrow roofs, often slate, with rear outriggers. Roof width usually limits the array before your budget does, and slate needs the right fixings and proper scaffold.
Interwar and post-war semis
Much of outer Watford is 1930s to 1960s semi-detached housing. Concrete tile, unbroken slopes and typically a one-day install. On this stock the consumer unit is often the thing that needs attention, not the roof.
Cassiobury, Nascot and the conservation areas
The larger houses around Cassiobury and Nascot have bigger roofs and more room for storage, but parts of Watford are conservation areas. Roof panels on an unlisted house are usually permitted development; listed buildings need consent. We check before we quote.
The parts that change the price
Roof orientation, not postcode
What changes your output is which way the roof faces and what shades it, which is why we measure rather than estimate from an address.
Scaffolding access
Terraced streets near the centre can be tight for scaffold, and sometimes it has to stand on the pavement under a licence. We tell you at survey rather than add it later.
Grid connection
Hertfordshire is on UK Power Networks' Eastern network. Most home systems are notified after installation; larger inverters and batteries need G99 approval first — the Welwyn Garden City job took about two weeks. We make the application and handle the paperwork, and we check the operator for your postcode.
Working in Watford from Milton Keynes
We are based in Bletchley, about 50 minutes from Watford. That matters less for the install than for what comes after: if something needs looking at, we come out ourselves rather than subcontract it.
Our nearest finished job in Hertfordshire is in Welwyn Garden City: 8.64kWp of solar, an 11.52kWh Fox ESS battery and a Zappi EV charger on a single south-east roof, with G99 grid approval through in about two weeks. Fitted in September 2026.
We have not finished a job in Watford itself yet, and we won't pretend otherwise. Watford is near the edge of the area we cover.
Solar Panels in Watford — FAQ
From £5,600 for a 3.72kWp system and £5,900 for a 5.58kWp system on a straightforward roof, at 0% VAT until 31 March 2027. Slate terraces can cost more because of scaffolding and fixings, which we price at survey rather than adding later.
Yes. It is about 50 minutes from our Bletchley base, near the edge of the area we cover. We have not finished a Watford job yet; our nearest Hertfordshire job is in Welwyn Garden City.
Usually yes. The limits are roof width and orientation rather than anything fundamental. A narrow terrace roof caps the array size, so the honest answer on system size comes from measuring the roof, not from the number of bedrooms.
How it works
1. We call you back
Usually the same working day, to talk through what you want and book a survey.
2. Roof survey
About 40 minutes at your home. We measure the roof, check the consumer unit and look at where a battery could go.
3. A fixed price in writing
With an MCS performance estimate of what the system should generate. Nothing is added later.
4. Grid notification
We notify your network operator, or apply for G99 approval first on larger systems, which can take a few weeks.
5. Installation
Most homes take one or two days, with scaffold up for the roof work.
6. Handover
We set up the app with you and leave the MCS certificate you need to be paid for exporting.
Want a fixed price for a Watford roof?
A survey takes about 40 minutes and you get a written price with nothing left to add later. We handle the grid notification and the MCS certificate.
Get a fixed price for your Watford home
No obligation • Fixed pricing • MCS & NAPIT certified • Based in Milton Keynes