Your PV system reacts to the electricity price. Automatically.

Flex EMS follows the Swiss spot price for every quarter hour. When it drops below zero, Flex EMS limits your system's feed-in through the manufacturer's cloud and releases it again as soon as the price rises. No device on site.

No hardware on site
Set up in 3 minutes
Control via the manufacturer cloud

An example day on the spot market

Illustrative values. Flex EMS works with Switzerland's day-ahead prices, published the day before.

Registered in three minutes

All you need is the login of your manufacturer's portal. Flex EMS does the rest.

Register
Enter your contact details, the system's location and the inverter.
Allow access
Log in at the manufacturer, for example Huawei FusionSolar, and allow Flex EMS. You only enter your password there.
Flex EMS plans ahead
Tomorrow's spot prices are known today. Flex EMS knows when they turn negative.
Control command at negative prices
Flex EMS limits the feed-in through the manufacturer's cloud and lifts the limit again afterwards.

The Swiss electricity market

On the day-ahead market, electricity is traded for every hour of the next day. On sunny days with low consumption, the price drops below zero more and more often. Electricity flowing into the grid then has a negative value.

2024 292 hours with a negative price on 60 days, lowest price −428 EUR/MWh

2025 303 hours with a negative price on 70 days, lowest price −262 EUR/MWh

13 % of Swiss solar power was produced in these hours in 2024, 17 % in 2025.

Hours with a negative price per month