One other consideration is that you may not be allowed to add as much solar capacity as you would like, even if you know your electrical usage is going to increase greatly.
Currently, I live alone and have replaced all bulbs with LED bulbs and done everything possible to reduce my electric bill. Currently, my electric bill is
very low, about $30 a month. There will be two additional residents moving into the house in the next few months. We plan on setting up a home business which will use a lot of electricity and will also be adding one to three electric cars in the next 5 years. This will easily cause my electrical usage to be three to four times my current usage. Unfortunately, in order to tie into the grid with XCEL's "Solar Rewards" program, I would only be allowed to add capacity equal to 120% of my
current electrical usage. There is no allowance for
future planned electrical usage (other than the 20% above current). While I would like to be proactive and install sufficient solar capacity to cover my future needs, I am not allowed to on a grid-tied system bigger than what I currently use. I believe I could install a non grid-tied system but any extra production would go to waste without a battery system. I don't want to have to go through the process and hassle of adding more panels every year.
One option is to wait a few y
ears and add solar
after my average usage has greatly increased. Then I would be able to install many times as many panels as I am allowed now. Another option might be to be
very wasteful for the next year, replacing all LED bulbs with halogens, etc. and leaving them on 24/7. This would cause my average usage to skyrocket and after a year, I would be able to install a sufficient number of panels. Of course this goes against the whole idea of being efficient and 'green' so I would never actually do that. A third option is the use of community solar. There may be community solar gardens in your area which would allow you to buy a share of a solar farm. Based upon how many panels you purchase, you would receive a percentage of the production from the solar farm, offsetting your electric bill. The
Clean Energy Collective has set up many such community projects across the country. They seem to offer almost all of the benefits of solar installed on your home and almost none of the disadvantages. While they wouldn't help power your house during an outage, a battery backup such as the Powerwall could be used. Currently, the CEC solar farm in my county is sold out so I've put my name on the waiting list. Once panels become available or a new solar garden is built, I'll be able to purchase panels and instantly offset my electrical usage. As my usage increases, I'll be able to add more panels by just giving them my credit card number. No hassle about having an install done at the house every year.