The only downside I see is that you are locked into rates for 25 years. Then if there were a significant breakthrough in energy development and electrical costs actually dropped significantly. Big deal - you're out $500 bucks after saving money on your bill for a number of years.
The other downfall is if the rates went so high that the company was losing money buying off grid power for your back up that they went out of business.
Both scenarios seem unlikely.
Another thing this company is counting on are much more efficient appliances and lighting in the future. If a customer is locked in at a fixed $$ per month, there isn't much incentive to upgrade to the higher efficiency appliances.
Your house sounds like it is very cool!
Thanks the explanation. I knew there had to be a catch somewhere:-)
We didn*t build the house and to tell the truth it was built strictly for efficiency and definitely not for looks, but the longer we*re here the better we like it.
All those south windows let the sun shine in on a room with a brick floor. The room is 14*x42* and it sometimes gets so hot in here in the middle of the winter that we have to open an upstairs window to let out the heat.