Just visited Bimble and the guys there explained and sorted my ancient motorhome's solar arrangement and saved me money in the process - they could have taken much more off me but didn't, and that's priceless! Highly recommended.
One of the most helpful companies for photovoltaic and solar related products around. Very competitive too. Their deliveries are some of the quickest. I would not go past them.
Bimble Solar are worth a 10/10 any day of the week.