Repairs · any installer’s system
Solar Panel Repair Across England, Wales and Southern Scotland
Fault finding and repairs on any installer’s system — SolarEdge, SMA, Fronius, Growatt, Solis, SolaX and most other makes. Same-week inverter repair or replacement, anywhere in England, Wales and southern Scotland.
Mon–Fri 9:00am–5:00pm · Clear written quote before any work starts
Solar fault finder
What’s happening with your system?
What make is your inverter?
Roughly how old is the system?
Where is the property?
Leave your details and we’ll be in touch to book your initial visit.
We’ll ring you to talk it through and arrange a convenient time. Your answers above go with your enquiry, so you won’t have to repeat them.
We’ll talk through what’s happening and book your initial visit. If it’s urgent, call 0800 156 0191.
Rather talk now? Call 0800 156 0191 — free from UK landlines and mobiles.
MCS certified
NAPIT registered
TrustMark approved
Fully insured
England, Wales & southern Scotland · 1–2 day visits
What we fix
Tell us the symptom. We’ll know where to look.
Most faults show up in one of six ways. Whichever it is, an engineer diagnoses it on site and you get a clear written quote before any work starts.
Generating nothing at all
Inverter, isolator or DC faults — the most common call we get, and usually the quickest to pin down.
Error code on the display
Every make has its own codes. Tell us the code and the inverter model and we’ll often know before we arrive.
Output has dropped
Strings, panels, shading, connectors or degradation — we test the system, not guess.
Cutting out during the day
Grid voltage, overheating or firmware. Intermittent faults need proper monitoring, not a quick look.
Generation meter or FIT payments
Meter faults, monitoring that has stopped reporting, and the paperwork behind your payments.
Storm, bird or physical damage
Cracked panels, damaged cabling, nesting under the array — repaired and bird-proofed.
The battery won’t charge, a breaker keeps tripping, or the monitoring app shows nothing? Tell us that too — call 0800 156 0191 or use the fault finder at the top of this page. If a breaker keeps tripping, leave the system switched off until an engineer has looked at it. Want to check a few things yourself first? Work through our solar panels not working checklist.
Systems we work on
Any installer’s system. Any make.
We install our own systems and repair everyone else’s — of any make and any age, including systems whose installer is no longer trading. See inverter repair and fault codes by brand.
How we find the fault
Most faults aren’t the panels
When a solar system stops performing, most people assume the panels have failed. In practice, the panels are usually the last thing to go. They have no moving parts and are built to sit on a roof for decades. The problem is far more often somewhere between the roof and your consumer unit — and that’s where we start.
We work through the system in the same order every time, so nothing gets missed and nothing gets replaced on a guess.
01
The inverter
We read its error log and check its readings against the panels.
02
The DC strings
We test the voltage and current of each string of panels.
03
Isolators and connectors
We look for water, corrosion and faults to earth.
04
The panels
Only then do we look for a cracked, burnt or failed panel.
05
Monitoring and metering
We check the generation meter, Wi-Fi and app.
The inverter is the component most likely to fail, which is why we start there — see inverter repair for the detail. Insulation resistance testing on the DC side shows whether a fault to earth is making the inverter shut down. And sometimes the system is working perfectly and the fault is in the meter or the monitoring, which still matters if your feed-in tariff payments depend on the meter reading.
How it works
Four steps, no surprises.
01
Tell us what it’s doing
The fault finder above, or a call. The more you can tell us — make, error code, when it started — the faster we are.
02
An engineer within 1–2 days
Anywhere in England, Wales and southern Scotland. One of our own engineers — never a subcontractor — tests the system on site.
03
A clear written quote
What’s wrong, what it costs to fix, and what happens if the diagnosis changes — before any work starts.
04
Fixed, and back to generating
We source the parts, book the return visit, and get you generating again.
The diagnosis visit
A clear written quote before any work starts.
An engineer tests the system, tells you what’s wrong and what it will cost to put right — in writing. If the diagnosis changes once the work is under way, we tell you before doing anything. Repair is our core business, so there’s no pressure to rip out and replace.
What you get in writing
What’s wrong, in plain English
What it costs to fix — parts and labour
What happens if the diagnosis changes
When the return visit is booked for
What the first visit involves
An engineer comes to the property, talks through what you’ve noticed, and tests the system in the order above. That’s usually enough to find the cause. We explain what we’ve found in plain terms and give you a clear written quote before any work starts. Some faults can be put right during that visit; where a part is needed, we’ll talk you through the options first.
If a part needs replacing
If an inverter, isolator, optimiser or panel has failed, we’ll tell you whether it’s worth repairing or replacing, and why. Where the original part is no longer made, we’ll find a compatible alternative and explain any knock-on effects — for example, whether your Distribution Network Operator needs to be told about the change. We install our own systems too, so we know how these systems fail and which replacement parts last.
Also from L&R
The rest of what we do.
Solar inverter repair
Error codes, red lights and inverters that keep switching off.
Servicing & health checks
An annual health check that catches faults early, and panel cleaning with a system check included.
Battery storage
Added to an existing system or fitted with new panels.
Solar PV installation
Designed, installed and commissioned by our own MCS-certified engineers.
Guides
Useful guides.
Plain-English answers to the questions we’re asked most about faults.
Panels off for roof work?
How removal and refit works, scaffold and timings, and your feed-in tariff.
Solar installer gone bust?
What still protects you, how to claim, and who looks after the system now.
Solar monitoring offline?
Check the panels are still generating, and get the inverter back on your Wi-Fi.
Cracked or faulty solar panel?
The signs to look for, and whether one panel can be replaced with a close match.
Solar tripping the RCD or fuse box?
How to tell if it’s the solar, the common causes, and how it’s fixed.
Isolation or earth fault?
What the fault means, why it shows on damp mornings, and the code each inverter brand uses.
Storm-damaged solar panels?
What to check from the ground, what home insurance covers, and how to claim.
Solar panels not working?
Seven checks from the ground or the fuse board before you call an engineer.
How long do solar inverters last?
Why the inverter is usually the first part to fail, and when to repair or replace it.
Solar panel isolator switches
What the isolators do, and the signs that one is failing.
Solar panel optimisers
What optimisers do, and what it means when one stops reporting.
How long do solar panels last?
What to expect over 25 years or more, and which parts wear out first.
Do solar panels work in winter?
What panels make in the darker months, and what snow and frost do to them.
How much electricity should solar panels generate?
What a healthy system makes each month, and how to tell a fault from the weather.
Hybrid inverters
What a hybrid does, and when to switch to one as your old inverter fails.
Do solar panels work in a power cut?
Why panels switch off, what backup can do, and what to check afterwards.
Questions
The things people ask before they ring.
Not answered here? Call 0800 156 0191, Monday to Friday, 9:00am–5:00pm.
Do you repair systems you didn’t install?
Yes. We work on systems fitted by any installer, and on all the common panel, inverter and battery brands. We’ll tell you honestly if a part is no longer available and what the alternatives are. We also take on commercial solar maintenance and repair work, so call us to talk it through.
My installer has gone bust. Who can fix my system?
We can. We don’t need the original installer to diagnose or repair a system. If you have the paperwork — the MCS certificate, the inverter model, any handover documents — have it to hand, but don’t worry if you can’t find it.
Is it worth repairing an older system?
Usually, yes. Panels generally keep working for many years, and on older systems the fault is most often the inverter or a connection, both of which can be replaced without touching the panels. If you receive feed-in tariff payments, getting the system working again protects that income too. If a repair doesn’t make sense, we’ll say so.
How quickly can you come out?
Usually within 1–2 days, anywhere in England, Wales and southern Scotland. When you get in touch, we’ll offer you the earliest visit we can. If a breaker keeps tripping or you can see damage, tell us when you call, and keep the system switched off until we’ve seen it.
Do you cover my area?
Our engineers cover England, Wales and southern Scotland. Call 0800 156 0191 or tell us your postcode in the fault finder and we’ll confirm cover for your area.
What happens if a panel needs replacing?
We find a panel that’s electrically compatible with the rest of the string and fits the existing mounting system. The exact model is often no longer made, so we match the specifications that matter, fit the new panel, and test the whole string afterwards.
Ready when you are
Tell us what it’s doing.
The fault finder takes two minutes, or call and talk to someone who repairs solar every day. Mon–Fri 9:00am–5:00pm.