Solar monitoring: how to track energy production through the app

You've installed solar panels and, after a few weeks, the same question always arises: is the system really producing what it should? The good news is that you don't need to go up to the roof or wait for the next bill to find out. Solar monitoring, done through an app on your phone, shows you this in real time, with the installation "talking" to you every day.

What is solar monitoring and why it's worth looking at

Solar monitoring is, in essence, the dashboard of your photovoltaic system. Each inverter records how much energy is being produced, moment by moment, and sends this information to a platform that you consult on your mobile phone, tablet or computer. At LEFE we mainly install Huawei inverters, connected to the FusionSolar app, but the principle is similar in almost all brands: without monitoring, a solar system is a closed box on the roof; with it, you always know what is happening inside.

This matters for a simple reason. A broken panel or a faulty inverter doesn't make a noise or turn on red lights on the garage wall. Production drops quietly and, without the app, you only realize it months later, when the electricity bill is higher than you expected and you no longer remember how much it used to be.

There's also another, lesser-talked about perk: the app helps you confirm that the system is meeting the estimate you received in the proposal. When we size an installation, we calculate an expected production for each month of the year, taking into account the orientation of the roof, the slope of the panels, and the area of the country. With monitoring, you can compare these numbers with reality, month by month, instead of relying only on memory or a vague impression that "everything seems to be fine".

How the data gets to the app (step by step)

1. The inverter connects to the internet, usually via Wi-Fi or a small communication dongle installed next to the equipment.
2. Every few minutes, the inverter sends the production data to the manufacturer's servers.
3. The app receives this information and organizes it in easy-to-read graphs: instant production, production of the day, month and year.
4. If any value goes out of the expected, for example a string producing much less than the others, the system generates an automatic alert.
5. You receive this notification on your mobile phone and, if it is something that requires intervention, you can already contact LEFE with the identified problem, which saves time in the technical visit.

You don't need to understand electronics to follow this process. The app was designed for those who have never opened an inverter in their lives, with colors and icons that immediately indicate if everything is okay (usually green) or if there is something to check (yellow or red).

What you can see in the app, on a daily basis

Once configured, the app usually shows:

• Instantaneous production, in kW, and cumulative production of the day.
• Household consumption and percentage of self-consumption (how much of the energy produced is being used instead of injected into the grid).
• Daily, monthly and yearly history, useful for comparing, for example, August of this year with August of last year.
• Status of each inverter and, in larger systems, of each string of panels separately.
• Alerts of breakdown, production breakdown or loss of communication with the equipment.

If you have batteries installed, the app also shows the state of charge and how much autonomy time you have available, something especially useful on bad weather days or in a blackout. We have already explained this in more detail in the article solar batteries: when to invest, in case you want to better understand that part of the system.

Signs to watch out for

Best practices for getting the most out of the app

1. Check the app at least once a week; it doesn't have to be every day to be useful.
2. Turn on notifications for fault alerts, so you don't have to open the app on your own.
3. He always compares the same month between different years, because production naturally varies with the seasons.
4. Save the monthly reports if you are tracking the return on investment; it helps to confirm that everything is on schedule (we have an article on that: payback of solar panels).
5. If you see a strange value, take a screenshot and send it to LEFE before jumping to conclusions; often it's just a cloudy day.

Monitoring is not a substitute for maintenance or technical visits, but it is the simplest tool to understand, at any time of the day, if your system is doing what it promised. And, increasingly, this is what separates those who make the most of solar investment from those who only discover a problem when it is too late to avoid months of loss.

It is also worth a simple warning: the app is not just for the first few months, after the "novelty" is installed. The greatest value appears precisely over time, when you already have two or three years of history to compare and can identify patterns, for example if the production of a given month is systematically below expectations, year after year, which can point to new shading or panels that need attention.

If you don't have a system installed yet and are deciding where to start, the first step is to choose the right equipment and sizing for your home; we have left some useful notes in the article How to choose the best photovoltaic system for your home.