Do you have a pool? You could save a lot by investing in solar panels. There are small solar energy systems designed to power a water heater or a water pump and since you only use your pool during the warmer months, your panels will work perfectly when you need them.
If you lease solar panels to save the upfront costs, check the contract for the possibility of transferring the lease. If you sell your home or building that panels are installed in within the lease period, you want to be able to legally transfer the lease to the new owners of the property.