Power Bank
Blackview OSCAL PowerMax 6000 PM6000 Rugged Power Station with PM400 400W Foldable Solar Panel Set 3600Wh to 57600Wh LiFePO4 Battery Pack Power Station with 14 Outlets 5 LED Light Modes Morse Code Roller Power Backup for Emergency Communication Camping
Questions and Answers
What frequency is the AC working at? Can it be synchronized to the line frequency in Europe?
yes
how long can I use it with a split or air conditioner
This depends on the power rating of your device.
how many kW this set generates and for how many hours it can run