News and Updates of the Solar Simulator

Expected against real

The heart of the product, and the thing an inverter portal cannot show you: the measured number inside the range it was supposed to fall in.

Every night a digital twin of your system reconstructs the day just ended using the weather actually recorded above your coordinates, the geometry of your roof and the specifications of your panels.
The result reads like a lab report: what it produced, the band of what it should have produced, and whether the value falls inside or outside. No charts to interpret.
The site now shows two days side by side — one in line and one below the band — because a single bar does not teach you how to read it.

An alert that always arrives stops being read. This one fires only when it needs to, and says so explicitly.

The alert fires when the problem starts, not every day it lasts, and never for bad weather: an overcast day is not a fault.
When something is wrong it tries to say why — dirty modules, a fault, new shade, a grid limitation — and puts the checks you can run yourself first, from the ground and without tools.
It only triggers when the gap exceeds the margin the model declares: if it falls within the uncertainty we admit to, blaming your roof would be wrong.

A drop in percent makes nobody decide. In euros it does.

Every bad day carries what it cost you and what it would cost over a month if it stayed that way.
And it tells you when not to spend: if Thursday brings enough rain to wash the modules, waiting costs less than a cleaning — and it writes that down.
That is why you can believe it when it does tell you to act.

The comparison needs one number: how much you produced yesterday. There are four ways to give it.

Connect your inverter's portal once, and from then on you do nothing. Today SolarEdge, Huawei FusionSolar, Zucchetti ZCS and SolaX connect.
If yours is not among them: upload the history as a CSV, use an API key, or type one number a day. And if your make is missing you can ask for it — the list grows according to what people ask for.
With the history in, on day one you already see the past: how the system has performed so far and which problems it likely had. It is included in the subscription.

The same foundations improved the public simulator, which stays free.

The recommended size now starts from the real yield at your address instead of a regional average: two roofs three hundred kilometres apart do not perform the same.
The choice between home, business and land is now made at the start, where it changes VAT, tax relief and how much energy is used on site — instead of at the end, with the numbers already shown.
The technical documentation has moved next to the application, so it stays aligned with the product it describes.