An SMA inverter showing an error code or no longer producing isn't necessarily out of service. wendows diagnoses the fault — often remotely via monitoring — interprets the error codes and intervenes on site. A single point of contact for repair, warranty and follow-up.
Not every error code signals a breakdown: some are temporary grid faults. Here are the situations we diagnose most often in Belgium, and what to do next.
An error code appears on the inverter or in the app. Many are temporary grid faults; others require intervention. We interpret the code before travelling out.
The inverter is no longer producing or is under-producing. Via Sunny Portal, we check whether the issue comes from the inverter, the panels or the grid, with no needless call-out.
After many years, an inverter may need replacing. We advise the right SMA replacement model, compatible with your existing installation.
If the inverter is under manufacturer warranty, we manage the claim and liaise with SMA. You don't have to chase the manufacturer.
A good repair starts with a good diagnosis. The key points of our method for SMA inverters, applied by our teams across Belgium.
When the installation is connected, we read the error code and history via monitoring. Many cases are diagnosed without a call-out, which saves time.
We interpret the code shown: a temporary grid fault, a panel issue, or a genuine inverter failure. Each code points to a probable cause.
If intervention is needed, we arrive with the right equipment and the right part, identified beforehand. Fewer back-and-forths and a faster return to service.
If the inverter is under warranty, we file the claim and liaise with SMA. You keep a single point of contact from diagnosis to repair.
If the inverter is at end of life, we advise an SMA replacement model compatible with your panels and your existing installation.
Before any out-of-warranty repair, you receive a clear quote. No surprise interventions: you decide with full knowledge of the facts.
* Valeurs indicatives selon la gamme et la configuration. Les performances et garanties exactes dépendent du modèle, du vitrage et des dimensions — confirmées lors du métré.
Faced with a broken inverter, the worst part is not knowing who to call. As an approved SMA installer, wendows diagnoses, repairs and manages the warranty — a single point of contact, from the first call to the return to service.
A repair is a chance to review your installation. Depending on the diagnosis, several paths may follow. Compare, then we'll frame the next steps together.
An overview of the SMA ecosystem: inverters, battery and monitoring, to place the equipment to repair or replace.
See the SMA range → to combineThe monitoring that enables remote diagnosis. Reading it is often the starting point of a successful SMA repair.
See Sunny Portal → to understandBefore replacing, understanding the inverter's role helps you choose the right compatible replacement model.
All about inverters → replacementThe most common single-phase replacement model in residential. Often the logical next step after an end-of-life inverter.
See the Sunny Boy → to combineA repair is sometimes a chance to add storage. The Home Storage battery boosts self-consumption.
See Home Storage → overviewIf the fault comes from the panels and not the inverter, these pointers help frame the next steps of the installation.
See solar panels →An SMA inverter showing an error code or no longer producing is worrying, but the fault isn't always serious. Many codes signal a temporary grid fault that resolves on its own. Others require intervention. The first step is therefore to interpret the code, not to panic.
This is where monitoring changes everything. When the installation is connected to Sunny Portal, we read the error code and history remotely. This lets us triage: a genuine inverter failure, a panel issue, or a simple grid fault. Many cases are resolved or prepared without a call-out.
"An error code isn't a death sentence: read properly, it shows exactly where to look — often without even travelling out.
If intervention is needed, our status as an approved installer matters. We arrive with the right part, identified beforehand, and if the inverter is under warranty we file the claim and liaise with SMA. You keep a single point of contact, from diagnosis to return to service.
A single point of contact for after-sales. Diagnosis, error codes, warranty, repair or replacement: everything goes through wendows, from the first call until your installation is back in production.
For end-of-life inverters, replacement is prepared: we choose an SMA model compatible with your panels and your installation. On the budget side, you receive a clear quote before any out-of-warranty repair. To frame a replacement, start from our solar panel pricing page.
The cost depends on the nature of the fault and on warranty coverage — not on a single flat rate. Here are some pointers for an SMA repair or replacement by our teams.
See solar panel prices →* Indicative pointers. Transparent diagnosis and quote before any out-of-warranty intervention.
Not necessarily. Many codes signal a temporary grid fault that resolves on its own. Others require intervention. The best thing is to send us the code: we interpret it and tell you whether to act, often without a call-out.
Yes, when the installation is connected to Sunny Portal. We read the error code and output history, which lets us triage the cause — inverter, panels or grid — with no needless call-out, and prepare the intervention if one is required.
First check the screen or the app for any error code, then contact us. Via monitoring, we identify the source of the fault — inverter, panels or grid — and intervene with the right part if needed.
If the inverter is still under manufacturer warranty, we file the claim and liaise with SMA. Out of warranty, you receive a clear quote before any intervention. You decide with full knowledge of the facts.
After many years, an inverter may reach end of life. We assess whether it's repairable or whether it's better to replace it with an SMA model compatible with your panels. A replacement starts from around €1,200, installed.
Yes, our teams provide after-sales for SMA inverters across Belgium. A broken inverter means lost output every day: we act fast, starting with remote diagnosis where possible.
Free on-site survey, recommended range, grants calculated, a single point of contact. Describe your project in under a minute.