I’ve just received my Energy Spotlights. How are they worked out?
You don’t know what equipment we have in the house, and there’s only only cable out of the electricity meter and one pipe out of the gas meter, so how can you calculate what we’ve used our electricity and gas on?
They appear to be totally wrong, since they say 38% of our gas in June was used on heating, and the heating wasn’t needed in June!
Best answer by Ed_OVO
Different electrical appliances have distinct energy use signatures - for example, a fridge normally operates over a 90-minute cycle, while an oven consumes a large, constant amount of energy as it heats up, then switches between on and off to maintain the temperature. We can see smudged versions of these distinct device signatures in your smart meter data.
By combining what we know about how different appliances use energy, your usage data, and other relevant information (like the time of day), we estimate how much energy you’ve used in different areas. Gas heating is calculated slightly differently. We estimate how much gas is used on heating by comparing your gas usage in the summer months to winter months. Your gas breakdown will be more accurate once we've seen your usage from July and August.
We're also working on improving how we estimate heating consumption in the future by including the outside temperature in our calculations.