Doorbell 3 solar charging issue

Hi there i have had. RVD 3 and solar charger in place for about 3 months no issues at all until today - app says the solar charger is connected - but battery is at 30% we are currently having the hottest weather in the uk and until now its been pure rain and ive had no issues with charging at all..Now with full sun its stopped its cleaned its connected i have re assembled it again but nothing… any soloitions i can tryI aslo removed the battery completely the app said its was connected and charging and working there was no battery attached ?