Customer Service Reply:
We are very sorry, please contact our after-sales team by email with relevant pictures or videos about your product. Our after-sales team will try their best to help you solve the problem of the product. Please refer to the contact details at the link below.
https://eur.vevor.com/pages/contact-us
Great product, woorks very well. I am using it in combination with solar pannels and it is a perfict fit for additional power generation in the cases of cloudy days