I have one solar panel on my small travel trailer. It basically powers the trickle charger that feeds to the 12v battery, as to run the 12v refrigerator and the (propane) furnace.
When we first got it I didn't quite have my head around the various pieces of the system (battery, inverter, and converter) so we would turn on the 12v fridge and marvel at how it cooled. Then I began to delve into the complexity of it because of the 30 amp hookup and how that interfaces with the 12v system when hooked up to shore power.
When hooked up to shore power, camping is all systems go and we never run out of hot water. When travelling it is nice because we can pull over at a rest area and have our own food and a restroom ready at hand. Boondocking, however, would require some creative power management to prevent over-draining the battery.
The big challenge I'm running into is the maintenance side. Basic electricity is not all that complicated by comparison, but add in the power routing and computerized aspects of integrating solar into a system and it gets complicated very quickly. The average person will be forced to call on a specialist anytime something goes wrong.
So the Brits are correct: solar is not the be all to end all, but it has it's uses for supplementing power needs for various applications.