No error message. But a burnt-out connector.
Current monitoring
0alerts
SunMonitor
−12.3%yield
Inspection
BurntMC4 connector
Missed revenue: €388 per month.
Read the full case (in Dutch) →
Are your solar panels producing what they should?
SunMonitor independently monitors the output of your commercial solar installation. If we detect a deviation, you don't just get an alert, but also insight into the potential loss and advice on the next step.
Independent • 15 years of experience • Measurement based on IEC 61724
SunMonitor Performance analysis
September 2026
Yield deviation detected
Your installation produced 12.3% less than expected.
Your missed revenue
€ 4,656
per year
SunMonitor subscription
€ 375
per year
✓ The subscription costs less than one month of this loss (€388)
Actual production in September
18,510 kWh
Expected production in September
21,098 kWh
SunMonitor conclusion
The installation kept producing power, but delivered less than expected. SunMonitor detected this deviation. Closer investigation revealed physical damage to the installation. Read more →
Without this monitoring, the damage would have gone unnoticed and the production loss could have continued.
Real-world example
No error message. But cell cracks in several panels.
Current monitoring
0alerts
SunMonitor
−11,700kWh per year
Inspection
Cracksin several panels
Permanent loss: €1,755 per year.
Read the full case (in Dutch) →
No fault. But panels that could blow away.
Last inspection
2023none since
Baseline
Rejectedperiodic inspection
Inspection
Defectsloose clamps, cable damage
Risk: panels blowing off the roof and cable damage.
Read the full case (in Dutch) →
Actual findings by SunMonitor. Loss amounts are an estimate based on the measured deviation.
From production to insight
Your solar panel app shows production. SunMonitor tells you whether that production is correct.
Step 1
Retrieve production
SunMonitor reads the actual yield from your inverter.
Step 2
Calculate expectation
Based on location, installation and current weather conditions.
Step 3
Compare and assess
Actual versus expected. Deviations are flagged as soon as they are relevant.
Step 4
You receive the conclusion
In addition to your dashboard, you receive a report with a clear answer: is action needed or not?
No technical knowledge required. We handle the analysis. You receive the result.
What you receive
In addition to your dashboard, you receive a report with a clear conclusion.
Example
Monthly report
September 2026
18,510 ▼ -12.3%
kWh this month
74.0% ▼
Performance Ratio
99.6%
Availability
€2,776
Production value
2,588 kWh
Estimated loss
€388 /mo
Missed revenue
September 2026 was below expectations: 18,510 kWh produced, -12.3% below expectation. Estimated loss: 2,588 kWh (€388). 1 incident resolved (communication failure inverter 2, 4 hours). Additionally, structural underperformance on the south-facing roof section, likely soiling. Recommendation: schedule an inspection.
This is a real SunMonitor report. Every month you receive this for your installation, with a conclusion you can act on immediately.
Why SunMonitor
Why businesses choose SunMonitor
Not just insight into what your panels produce, but certainty about what that production means.
01
Certainty about your investment
Solar panels are an investment of tens of thousands of euros. But are they performing as expected? Without independent verification, you only find out when the damage has already been done. SunMonitor gives you the answer, substantiated and continuous.
02
Prevent prolonged, unnoticed production loss
A poorly performing panel or a creeping defect can go unnoticed for months. That is not just missed revenue, but also avoidable loss. SunMonitor detects deviations early, so you can act before a small problem becomes a big one.
03
Clarity without technical knowledge
No dashboards full of charts you have to interpret yourself. No loose alerts without context. SunMonitor delivers an understandable assessment: how is your installation performing, and is action needed - yes or no.
04
Completely hands-off
SunMonitor installs its own hardware at your inverter and takes care of the rest. No sharing login credentials, no involving your IT department, no action required on your part. You are only involved when it is truly necessary.
Compatible with
Behind SunMonitor
Ron Kalyan
Founder & technical specialist
I have worked in the electrical engineering and solar energy sector for more than 15 years. As a Lead Technician, I have built, maintained and analysed hundreds of installations. I know what lies behind a deviation. Not just in the data, but also on the roof.
I have translated that experience into SunMonitor: monitoring that does not just show what is happening, but assesses whether it is correct. Simply an honest answer to the question: is my installation performing as it should?
You should be able to understand how your installation is doing, without having to be a technical specialist yourself.
15 years of experience
Proprietary software
Independent position
“I already have an app for my solar panels.”
Your app shows production. SunMonitor assesses whether that production matches the conditions. That is a different question.
“I don't have technical knowledge.”
That is exactly why SunMonitor exists. You do not receive a dashboard full of charts, but a report with a conclusion in understandable language.
“My installation is working fine.”
That is what many owners thought. An installation can produce for years while structurally yielding less than it should. That loss is invisible. Until someone makes the comparison.
Request a free technical consultation
Leave your details. A technical specialist will call you within one business day to discuss the monitoring options for your installation.
No obligations
Response within one business day
By phone
Frequently asked questions
Your questions, honestly answered
I already have monitoring from my inverter manufacturer. What does SunMonitor add?
Your manufacturer's monitoring shows what your installation produces. SunMonitor installs its own hardware at your inverter and assesses whether that production is correct, by comparing actual yield with what can be expected under the given conditions.
Which inverter brands are supported?
Including Huawei, SolarEdge, Sungrow, Growatt, Fronius, SMA and GoodWe. Via local Modbus.
Does SunMonitor replace my installer?
No, quite the opposite. SunMonitor prefers to work together with your installer. When we detect a deviation, we provide targeted advice so the problem is resolved faster. Don't have a regular installer? Then we take full care of it and ensure the right party is engaged.
How quickly am I live?
After sign-up, we ask for the brand and type of inverter and the location of your installation. Then we visit to install our hardware at your inverter. Your installation is not modified and continues producing normally. Usually the monitoring is operational within 1 business day.
How much does it cost?
After a short assessment you receive a transparent proposal tailored to your installation. SunMonitor typically starts from €1.50 per kWp per year, with a minimum of €350 per year.
What if my installation is performing well?
Then that is good news. You receive confirmation that your installation is performing as expected. That certainty is exactly what the service is for. Not only finding problems, but also confirming that things are going well.
What happens when SunMonitor finds a problem?
You receive a clear report with our finding, the possible cause and a recommendation for the next step. Not with every small deviation, but when action is advisable. You decide for yourself whether and when to contact your installer.
Does it work with multiple locations?
Yes. SunMonitor can monitor multiple installations at different locations. You receive a separate assessment per location, so you maintain an overview of your entire portfolio.
Have another question?
Send us an email. We respond within one business day.
Ask your question