I started out with a 230w 24v panel that I picked up cheap on craigslist, they sell for as low as $130-140 plus shipping from solarbld.com. I added a pair of 50 foot of 10 AWG MC4 cables that I get off of ebay for $50 shipped and a Eco-worthy 20a MPPT controller that runs $102 shipped. I never mounted it, instead used it on the ground to get a feel for what it would do for us and what we wanted out of the solar. Roughly it is the same set up and BFL uses and a few others. Even left flat it was more than we could use without a huge inverter.