Mike
I bought one of these a few years back, took it Glastonbury and it kept the leisure battery topped up all week in my mates Hymer. Just for using the lights at night and 4 phones it was perfect. I've used it loads since to keep the leisure battery topped up for charging.
https://www.amazon.co.uk/Supernic-M...rds=30w+solar+panel+kit&qid=1659533709&sr=8-8
or spunk a load of cash on one of these things.
Cheers Darius
Those battery packs look good . Had to sit through the whole video and never got told the price £379 up to £1k … reckon the lower price one could be a decent buy?