Getting lists of those who went Solar Already (and happy), and ask them to become Ambassadors and pay for them Referral Commissions, when the homeowner they referred, installs Solar.
In Solar leads space, this is called customer acquisition cost - made of many components - one of which is lead generation. Of course, you can generate leads for free - a telephone directory. But what is the quality of that lead? How much are you going to spend on qualifying that lead? How about converting that lead into an opportunity? You have to look at the cost of leads holistically - which includes lead generation, lead qualification, lead fallout, lead conversion. We have analyzed this from every which angle and developed a solution that can reduce your entire customer acquisition costs.