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Treat that with a pinch of salt, the promise is that it wont go down but will keep up with inflation
When i double checked the figs, i just times the current yearly rate by 20 to give me the worse case fig and it still covered the cost of the install, then you need to add factors like it will add value to your house etc.
The only things you can say for sure is that elec rate will go up, so your saving on that will get bigger |
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