Solar inverter replacement.
From £550 fitted.
Solar inverter stopped working? A blank screen, red light or error message can be worrying. We’ll help you understand the fault and find the right repair or replacement.
Free, no-obligation quote. Final fitted price depends on the inverter and any additional work required.
Your panels may still have plenty to give. Let’s find out what’s stopping your system.
What’s your inverter doing?
You don’t need to know the fault code to get in touch. Start with the symptom that sounds familiar.
“It looks completely dead.”
Check it during daylight. A solar-only inverter may sleep at night, but a blank display and no generation in good daylight need investigating.
“There’s an error on the screen.”
Take a photo of the whole display. The exact wording and model help us tell an inverter fault from a supply or solar-panel issue.
“The app says offline.”
Lost monitoring does not always mean lost generation. The internet connection or data logger may have stopped communicating.
Before you book a replacement.
These checks help us understand the problem. There’s no need to open anything or touch the wiring.
Look in daylight.
Make a note of the time, weather, screen message and indicator lights. Solar-only inverters normally need sufficient daylight to start generating.
Compare the readings.
If safely accessible, look at the inverter display and your generation meter. Note whether the meter reading increases over a period of daylight. An app alone may not tell the whole story.
Send us the details.
Tell us the make, model, fault message and when it started. If the unit is safely accessible, a photo of the front and model label is useful. Don’t climb to reach it.
Keep it safe: don’t remove covers, unplug solar connectors or repeatedly reset a tripping breaker. If you notice burning smells, smoke or exposed wiring, keep clear and seek urgent help; call 999 if there is a fire.
An error message is a clue.
We’ll help find the cause.
The same symptom can have different causes on different models. These are starting points for understanding a fault, not a diagnosis of your system.
Blank display in daylight
A blank screen could be linked to the inverter, its supply or the solar input. A failed display is also possible, so we check whether the system is actually generating.
What helps: Tell us whether any lights are on and whether your generation meter is still increasing.
Grid fault or “no grid” message
The inverter may be unable to detect an acceptable electricity supply. Grid voltage, a supply interruption or an electrical connection issue can cause a shutdown; replacing the inverter may not resolve it.
What helps: Record the message and whether the rest of your home has power.
Isolation, insulation or earth fault
This can indicate an electrical insulation problem in the solar circuit. The inverter may be stopping generation to protect the system, rather than being the failed component.
What helps: Arrange a professional investigation. Don’t open the inverter or disconnect any solar cables.
Repeated trips, restarts or clicking
Repeated shutdowns can have several causes, including the supply, wiring, solar circuit or inverter itself. A single symptom is not enough to identify the part that needs replacing.
What helps: Note when it happens and avoid repeatedly resetting the system.
Low output or temperature warnings
Cloud, shade and the time of year affect solar output. Persistent heat warnings or an unexplained drop compared with similar conditions warrant a closer look.
What helps: Tell us if the change is recent. Keep stored items away from the inverter’s ventilation space without touching the unit.
App offline but the system looks normal
An internet, Wi-Fi or monitoring issue can stop data reaching the app while the inverter continues generating. A monitoring fault and an inverter failure need different solutions.
What helps: Check whether your home internet works and record what the inverter or meter shows.
For example, SMA distinguishes grid incidents from insulation and device faults in its model-specific guidance. Grid incident guidance · Insulation fault guidance. Codes vary by model.
Help with older and existing
solar inverter brands.
Solar River, Solis, SMA, Aurora, Fronius and SolaX Power are among the brands homeowners ask us about. You don’t need to choose a replacement yourself.
Solar River inverter replacement
Have an older Solar River inverter that has stopped working? Send us the full model label and any screen message. We’ll assess a compatible replacement against your existing panels and electrical setup.
Solis inverter faults & replacement
Tell us whether the inverter itself shows an alarm or only the monitoring app is offline. Include the model and exact message so we can assess the fault and your repair or replacement options.
SMA inverter replacement
For an SMA inverter, including a Sunny Boy, the event number and model are useful starting points. An event can relate to the grid or solar circuit, so we check the cause before recommending replacement.
Aurora inverter replacement
If your Aurora inverter has stopped generating, photograph the display and model label if safely accessible. A replacement need not carry the same badge, but it must be suitable for your solar array and installation.
Fronius inverter faults & replacement
Make a note of any state or status message and the full inverter model. We’ll consider the fault, available support and the suitability of a replacement for your existing system.
SolaX Power inverter replacement
Let us know whether your SolaX system has a battery as well as solar. Battery compatibility and system configuration matter when assessing a hybrid inverter replacement.
Brand names identify the equipment we can assess; they do not imply manufacturer-authorised repair status. Support, parts and warranty options depend on the exact model. Don’t see your brand? Send us the details.
Repair, replace — or fix
something else?
We start by understanding the fault and the system around it. The aim is to get your solar working properly with a sensible, clearly explained recommendation.
When another fix may make sense.
A monitoring problem, an external electrical fault or a warranty-supported repair may be the better route. A new inverter won’t fix a problem elsewhere in the solar installation.
When replacement may make sense.
If the inverter has failed and a suitable repair is unavailable or poor value, replacement can be a practical option. We check compatibility and explain the equipment, scope and warranty before you decide.
The link between your panels
and your home.
Your panels generate.
Solar panels produce direct-current electricity from daylight.
Your inverter converts.
The inverter turns that electricity into the alternating current your home uses and monitors its connection to the grid.
Your home uses it.
Solar can supply household demand, with surplus exported where your system allows. If conversion stops, you lose that contribution from solar.
An inverter replacement can often retain your existing panels, subject to checks. The new unit must suit the panel arrangement, electrical limits and any battery or export-control equipment.
Know what you’re paying for.
A replacement quote should cover more than the box on the wall. The inverter’s size and type, access, wiring condition and any additional work all affect the installed cost.
A clear quote for your system.
Send us your postcode, inverter model and fault details. We’ll explain the proposed next step and confirm any diagnostic visit charge before you book.
For a replacement, we’ll set out the new inverter, installation work, testing, monitoring options and applicable warranty. Any additional remedial work should be identified and agreed.
The right fit matters.
Your panel capacity and string arrangement. The inverter’s voltage and current limits. Your electrical supply, export settings and metering. Any existing battery and monitoring equipment.
Replacing an older unit does not automatically mean you need new panels or a battery.
A straightforward next step.
Tell us what’s happened.
Share the inverter make, model and fault symptoms. We’ll review the information and explain whether testing or a site visit is needed.
Review the recommendation.
Understand the diagnosis, proposed equipment, installed cost and warranty. We’ll discuss any other work before proceeding.
Install, test and hand over.
If a replacement is agreed, we fit and commission the suitable inverter, explain its operation and provide the relevant handover information.
Practical work.
People you can speak to.
We help homeowners with existing solar systems, including installations completed by other companies. Based in Nuneaton, we can discuss availability for your postcode.
Sunergy inverter installation
Sunergy inverter installation
Sunergy inverter installation
Sunergy inverter installation
Sunergy inverter installation
Sunergy inverter installation
Clear answers before you decide.
Not necessarily. An inverter and the panels are separate parts of the system. If testing identifies an inverter failure and the panels and wiring remain suitable, a compatible inverter can often be fitted while retaining them.
A solar-only inverter may shut down or turn off its display when there is insufficient sunlight. Behaviour varies by model, especially with hybrid and battery systems. Check again during daylight; a blank screen alone does not prove a fault.
There is no universal restart sequence. Follow the user instructions for your exact model or ask for professional advice. Don’t remove covers, change protection settings, disconnect solar connectors or keep resetting a system that trips.
Yes, we can assess existing installations even if Sunergy did not fit them. Send us the make, model, fault details and postcode so we can discuss the next step.
Not always. Compatibility with your panels, wiring, electricity supply and any battery or export-control system is more important than matching the badge. Some battery systems require specific compatible equipment.
Tell us if you receive FIT payments before any work is agreed. We’ll review the proposed replacement and metering arrangement. Keep the equipment and installation records, and check any notification requirements with your FIT provider; don’t assume every change is treated the same way.
It may be an option, but it is a separate design decision. We can compare a straightforward replacement with a battery-ready or separate battery system where suitable. Explore adding battery storage to existing solar.
A straightforward swap is different from a job needing fault tracing, access arrangements or wiring changes. We’ll confirm the expected visit length and any interruption after reviewing your system.
Warranty length, cover and registration requirements depend on the proposed manufacturer and model. Your quote should confirm the product warranty and installation cover, including any relevant exclusions.
Tell us what you’re seeing. We can discuss an assessment before a replacement is chosen. Read about solar servicing and maintenance.
Tell us what you’re seeing.
A few details are enough to start. We’ll help you understand the next step and whether a replacement is likely to be needed.
No need to choose a new inverter first. If we need photos or more information, we’ll let you know.
We’ll use your details to respond to this enquiry.
Understand your inverter. Know your options.
Our guide explains the role of a solar inverter and the things to consider when choosing a suitable replacement for your system.
Fault codes are model-specific. For technical reference, see SMA’s Sunny Boy manual, the Solis service centre or Fronius Help Center. Electrical tests and repairs should be undertaken by qualified people.