California solar, kudos scalerobotics. The solar dish is a dangerous autonomous robot. It must know where the sun is from a clock time/date algorithm and where the dish points. Otherwise, if the sun suddenly appears from behind a cloud then a rebel dish could melt rocks or start fires. I was once set on fire by walking into the invisible beam. It was like being hit with a 10 kW laser.

It appears the dish control system will cost $15, plus sensors $? and Pololu dual motor Hbridge TB6612FNG $8 for one.

The MAX232 is not so dear. Olimex make a populated PIC 40 carrier board ~ 1 @ $17, or 150 @ $13, or thousands w/o crystals @ <$10. Includes PIC 40 socket, MAX232, DB-9 plug, LM317 +3.3V / +5V power, status led, push button, 20 MHz crystal, reset button, ICSP, and circuit area for things like a DS1307 clock. Looks good for production start up with easy scale up.

http://www.olimex.com/dev/pic-p40.html

The business model is mass production from existing mass produced materials and parts all installed/maintained globally via local integration without central command and control. Local return on investment must be 20% (without subsidies) compared to current natural gas prices.

The huge and urgent objective is international global warming mitigation.

Best,
Doug