Electric Boiler

lI recently had a problem working out the best way to provide domestic hot water and how to heat our rural property in France. There are of course any number of ways but one by one for various reasons I either dismissed them completely or wasn't convinced that it was quite the right solution. I got to thinking electric boilers and this is what I turned up. Its small, its efficient and can be connected to a piped radiator system and indirect hot cylinder just like any gas or oiled fired boiler. I thought with cheaper than UK electricity in France and like the UK off peak tariffs I could be onto a winner. There are many manufactures of these. Has anyone had any experience of these heaters?

http://www.dealec.co.uk/acatalog/Heatrae_Sadia_Amptec_Electric_Boilers.html

http://www.gasapplianceguide.co.uk/amptec_electric_boiler.htm