This new DIY solar kit claims big bill savings — I tested it to see if it works

This new DIY solar kit claims big bill savings — I tested it to see if it works

Balcony solar is being sold as a cheaper alternative to rooftop panels — plug-in, expandable and DIY-friendly. But does the EcoFlow Stream system live up to the claims, and can it genuinely cut energy bills? We tested it over real British weather to find out