Submitted by Haggy on Fri, 2017-06-02 08:19
I'm looking into getting solar. Different companies provide models based on current usage, but don't factor in retirement. Typically they expect a bit more usage after retirement, but for an EV owner with a commute, a significant amount of the charging will go away upon retirement. The projections they give are based on 25 years, and are compared to hypothetical electric bills, but if at a given point in those 25 years, usage dropped to the point that the system was consistently providing more energy than was being used, it would be overkill. The problem is I don't have any given date for retirement.
Hypothetically, if my wife decides to retire in 5 years, a system properly sized now would be overkill for the next 20 years. One sized for retirement would mean paying for excess electricity, most of which would be at night rates. But she might not decide to retire for a decade.
How do EV owners looking at solar typically factor in retirement?