Before subscription community solar farms, there were "Solarize" campaigns — time-boxed neighborhood group purchases that traded volume for price. Geostellar ran one of the larger ones in Cleveland as part of its Solar Community Initiative, and the model's lessons still hold.
What the model got right
Three things. Aggregation cut soft costs: customer acquisition is a shocking share of US residential solar pricing, and a campaign that delivers a hundred pre-committed roofs lets installers quote materially lower. Deadlines beat inertia: a closing enrollment window converted years of "someday" into signed contracts. Trust transferred: a neighbor's install and a community organization's vetting did what no ad could.
Where it fell short
Group buys still required a usable owned roof and a five-figure commitment, which excluded renters and most low-income households. And the one-installer-wins structure concentrated risk: if the chosen installer under-delivered, the whole cohort felt it.
Where the idea lives now
The aggregation logic migrated into community solar subscriptions — shared arrays with no roof requirement — and into co-op purchasing groups that still run Solarize-style campaigns in many states. If one is active in your area, it remains one of the cheapest ways to buy an owned system; check your state's programs via DSIRE, then sanity-check any group price against the Solar Savings Calculator.