I have a new AC70 and trying to charge it with a Greenpulse 120w solar panel. Not working so well. AC button kicks on and flashes shutting down everything.
Open circuit voltage 24.4v
Short circuit current 6.11A
Max op voltage 20.9
Max op current 5.74
My first Q would be, is the panel polarity wired correctly to your AC70?
2nd. Have you checked the open circuit voltage with a multimeter to see if it is actually working.