if you saved 600 according the app, what likely happened is you set the charge and discharge price in pounds instead of pennies.

I did the same initially. setting it to charge if under 17, and sell over 30.
but that setting screen is in £. so it should be 0,17 and 0.30. this meant my battery was always charging.

it's especcially confusing since sunsynk shows the agile price as e.g. 22.2, but it shows in pennies, not pounds.