Saving money on your bills is not like increasing your income, there is no tax on reducing your outgoings and depending where you are Solar pays off in about 5 to 7 years and your expecting it to be 80% as good at 25 years. In terms of capital investments its one of the most reliable places to put money and get a decent return. Annualised ROI is about 6% for that 25 years but then the panels are still going to work a lot longer just at a bit less output.
Saving money on your bills is not like increasing your income, there is no tax on reducing your outgoings and depending where you are Solar pays off in about 5 to 7 years and your expecting it to be 80% as good at 25 years. In terms of capital investments its one of the most reliable places to put money and get a decent return. Annualised ROI is about 6% for that 25 years but then the panels are still going to work a lot longer just at a bit less output.