I know what is a more reasonable figure Ewan, IMO a simple water heater doesn't top out at 7K, a boiler that heats your house costs approx 8 - 900 squid (plus the labour of a registered gas-fitter for a day). This is plainly a rip-off there can be no doubt about it.I went to these guys when I was first contemplating a van-mount system, they wanted £500 to fit a split charge relay. When I queried the figure they reckoned it would need to be in the garage for a day and their mechanic wanted £300 to do it