A lot of people probably think you're crazy, but I think you're pretty close. He said something earlier this month about how they have made significant progress without any word getting out.
I don't think it's that crazy at all. At least not as crazy as building a rocket company from scratch to fly to Mars.
I agree my idea is unlikely, but it occurred to me after a recent road trip using the superchargers. My rationale is below.
Elon is clearly trying to get the monthly cost of ownership down to the magic number of $500/month. Unfortunately he cannot currently get there without some voodoo economics. Nobody bought into his $500/month pitch earlier in the month. The only way to truly get the price down is to reduce the vehicle's price or the operating costs. He can attack operating costs through reducing maintenance costs, insurance or fuels costs. He controls the first, has no control over the second, and can offer to "pay" for the third.
Let's say on average people drive 40 miles a day, so Tesla could offer to pay up to 40 miles a day when you charge at home. At 320 Wh/mile that would be 12.8kWh of energy. Using the national average of $0.11/kWh that would be $1.41/day or $42.3/month. That's not a huge expense if they can cost-effectively scale out a matching energy generation solution. They could even pay you via PayPal.
Not sure how well it would scale to hundreds of thousands of vehicles, but I think it could be economical for current Model S production rates.
Using Tesla's calculator that brings the monthly cost of ownership down to $650/month for a 60 kWh vehicle. But that is for a loan term of 63 months. After that point, the vehicle's cost of ownership goes negative compared to a gas vehicle (excluding maintenance for this discussion). Assuming you are saving $329/month in fuel (from Tesla's calculator), then only 12 months after your loan is paid off your average cost for the 75-month period is now $493/month. Own your car 10 years? Now your average monthly "cost" over that time period was only $185/month (again, assuming fuel savings). Good luck finding *any* other car that can match that 10 year cost of ownership at 15k miles/year. That's only $22,200 over 10 years.
Remember Tesla's stated goal is to create *sustainable* transport through adoption of electric vehicles. Their goal is not to just build another automobile company. How better to support this goal than to provision your vehicle's sustainable energy generation solution when you purchase the vehicle? That is what I call a strategy an owner would like!
Disclaimer: I recognize I did not include maintenance costs, the actual energy rates people pay are often higher than $0.11/kWH (mine included), etc. This is just a quick back of the envelope calculation for discussion purposes. I also know little to nothing of large scale solar installation economics, so feel free to tell me I'm crazy.