Baxi Ecogen

There is no additional gas usage when generating electricity. The Ecogen boiler only operates when there is requirement for hot water i.e. to heat the radiators in the central heating system or to heat the water in the hot water cylinder. When it is doing this then it is also generating electricity as a by-product of the heating process.

Thought it might be useful to give a 10 month update on the Ecogen, which was installed in February this year.Gas consumption has been 14,448kWh - compared to 19,756kWh for the same period in 2010, so a reduction of 26.8%. I take this as being due to going from an inefficient D rated boiler to the Ecogen - and given a similar level of usage over the time period suggests that the Ecogen is achieving efficiency equivalent to an A rated condensing boiler.

Electricity generated by the Ecogen is 1042kWh. This means that the boiler has been running for a very slightly longer amount of hours during the period. However, using this figure for the hours run gives an average gas consumption of 13kW, or put another way the boiler has run for 587 hours at just 6kW and 455 hours at full consumption of 24kW.Electricity consumed from the grid during this period fell from 4265kWh to 2983kWh, a drop of 1282kWh. This is substantially more than the amount generated, so suggests we've been a bit smarter and more efficient about electricity usage as well.

So far therefore I'm pleased with the performance