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Charging the battery from the grid

09/01/2026 | Last updated on 09 januari 2026

Through the ennexOS monitoring portal, you can now charge your SMA battery whenever you want. This allows you to take advantage of low electricity prices at night, for example: charge when it's cheap and consume power when it's convenient for you.

(Until recently, this was possible on the classic Sunny Portal, but not on the newer ennexOS. Now that it is possible, there's no reason not to migrate your system from the old portal to the new one if you're still using the old one. Click here to see how.)

Step 1: ennexOS

Log in to your account on the ennexOS website (ennexos.sunnyportal.com). Click on the cog wheel icon for configuration.

configuratie klikken

Step 2: energy management

Go to 'energy management'

klik op energiebeheer

Step 3: Battery

Click on the pencil icon next to 'Battery'

batterijen wijzigen

Step 4: Time-controlled battery charging

Swipe the marker to the right for 'Time-controlled battery charging'

Tijdvenstergestuurd laden

Step 5: Set charging time period

You can now set one or more charging time windows. For example, if you want to charge every day, except weekends, click on "Only certain days."

Tijdvenstersturing

Step 6: Select days

Select the days of the week by clicking on the day boxes

dagen selecteren

Step 7: Select hours

Select the time period during the day you want to charge the battery by clicking 'Edit' under 'Time Period'

Uren selecteren

Step 8: Enter hours

For example, here we chose to charge the battery every weekday between 3 and 4 am

uren geselecteerd

Step 9: Charging power

Finally, you can adjust the charging power (the automatically entered value is the maximum). Then click 'Save'

Laadvermogen

Step 10: End

Now you've set everything. The battery will start charging at the desired time and at the set power. If solar power is available at that time, it will be used for charging. If not, grid power will be used to charge the battery. Charging stops when the time period ends or when the battery is 100% full. You can change the setting at any time by following the same steps.