Also wanted to point out that a lot of Power utility companies will start charging a higher cost per Kw/hr once you go over a certain amount for the month or they have a tiered system. A 1,000watt/hr load 24/7 will put you at 720kw/hr's per month which generally is much more than a typical residential account uses and will probably put you into a more expensive rate bracket for part of that.

You might want to look into federal and state rebates and/or incentives to attract more customers seeing as how the average cost of installations are between $4-$5/watt.  When buying that much power you're cost per watt for the panels can get under $1/watt which makes it 1/4th of your total and a lot of people probably find that hard to stomach regardless of how you try to justify it.  That's like buying a $150 subwoofer, a $300 amp and then having a total install cost of $2,000 including the sub and amp... From what I read there are federal rebates up to 30% which would effectively lower your charge from ~$30,000 to ~$20,000.

Anyway your cost is inline with the national average, at a minimum the panels at $7,000 and an inverter for $3,000-$5,000 leaves $18,000-$20,000 for the rest of the materials and installation. Personally I'm an electrician so I'd just buy the stuff and install it myself.  Even if I wasn't, I'd rather buy the materials and pay a local electrician say $4,000 and be done for half of your cost. If I paid an electrician to do it their payment would require passing an electrical inspection by the county or city and the power company and they would have to guarantee their workmanship in writing for some length of time which I would have a lawyer draw up.

Honestly I don't think you or your company should decide to accept bitcoins as payment only if you think you can get people to sign on for installations or purchases. You have to look at the number of people actually interested in solar, then the people who actually have the money for solar, then the people who have the means for solar ie a place they can actually install it, then you have to factor in the number of those people who use bitcoin and then those who would be willing to pay with it.  All of that within your installation area and you are probably talking about a very small group of people and that's only looking at it from a potential which still leaves the actual finding of these people!  If you and your company think bitcoin is a good idea, set it up so you can accept payment, advertise that you accept it as payment and go from there.  Is it a lot of work to set things up to accept them?  The flip side is that you'll probably generate more interest in bitcoin from customers wanting to know what it is once you tell them you accept bitcoin, maybe offer them an incentive to pay with bitcoin.