Tax credits of $6,000 for PV system, evacuated tube domestic hot water system, pond loop and heat pump ($2,000 for each system).
No state incentives
No local incentives
No utility incentives
The estimated pay back time for making Trail Magic a positive energy home is 17 years. Over 30 years the annual return would be 9% of investment. Not a bad return when one takes the long view. The estimated pay back time for the carbon of the embodied energy in materials and systems that make Trail Magic positive energy is a difficult calculation we are unable to do. However, based on the embodied energy pay back time for a standard PV system (between 4 and 8 years from estimates I've seen), it is likely to be less than 17 years.
It is also important to recognize that making your home positive energy is unlike other things you purchase for your house project -- it is an investment with a pay back time. Quartz counter tops, hot tubs, marble bathrooms, etc. are not investments with pay back times. At the same time, each is an expression of your values and ethics.
Another way think about the investment to make your home positive energy is to look at it as an annuity. However, unlike the standard annuity this "positive energy" annuity increases its payout over the years as non-solar energy costs increase.