The savings by technology

The table below courtesy of The Eco Experts shows the potential costs and savings for each eco-home technology:

Low-carbon technology	Average cost (3-bedroom house)	Typical lifespan	Break even point*	Average energy bill savings per year*	Savings over 20 years	CO2 emissions saved per year	CO2 emissions saved over 20 years
Solar panels	£4,800	25-30 years	9 years	£530	£10,600	0.65 tonnes	13 tonnes
Storage battery***	£4,500	15 years	Never	£422	£8440	0.94 tonnes	18.8 tonnes
Double glazing	£7,500	25-30 years	Never	£145	£2,900	0.33 tonnes	6.6 tonnes
Cavity wall insulation	£1,200	25 years	4.2 years	£285	£5,700	0.66 tonnes	13.2 tonnes
Roof insulation	£530	40 years	2 years	£255	£5,100	0.58 tonnes	11.6 tonnes
Air source heat pump	£10,000	20 years	Never	£5	£100^	2.5 tonnes	50 tonnes
Electric vehicle charger	£950	5-10 years	5.3 years	£252****	£5,040	N/A	N/A*****
Smart thermostat	£225	10 years	2.3 years	£100	£2,000	0.5 tonnes	10 tonnes
Total	£29,705	-	9years	£1,863	£37,260	6.16 tonnes	123.2 tonnes

*Based on current electricity prices at 28p per kWh

**Break-even point is based on when savings exceed initial purchase cost

***When combined with solar panels

****When compares with charging your electric vehicle at a public charge point

*****In most cases, you use the same electricity whether you’re using it at home or in a public place

^Based on the fact that you would have to buy a new gsa boiler after 15 years