35% Rooftop Solar Cross-sell Opportunity

The 35% solar attach rate matters because it means Base is not starting from zero when it moves beyond batteries into a fuller home energy stack. A homeowner who already has panels has already accepted a roof sale, an interconnection process, and a home electrical upgrade, so selling that home a battery, backup controls, or a replacement solar system is much closer to an upsell than a cold start. Base already owns the electrician visit and the power relationship, which makes that next product cheaper to sell and install.1 2 3 4

• In practice, solar homes are the most natural battery buyers. Panels make daytime power, while the battery stores excess generation for evening use or outages. Austin Energy is already using residential batteries as dispatchable capacity, which means a solar plus storage sale can create both homeowner value and grid revenue from the same box on the wall.1 2 4
• Base has already shown two efficient distribution wedges. It sells into new construction through Lennar, where the battery is part of the home from day one, and it is building a utility channel through Austin Energy, which reserved 40 MW across Base homes. Adding solar to either channel raises revenue per home without rebuilding the go to market from scratch.1 2 5
• Comparable companies show what this can become. GoodLeap expanded from financing into solar plus storage and virtual power plant programs, while SPAN sells the electrical control layer that ties together batteries, solar, and EV charging. Base is coming from the battery and electricity plan first, but the same bundle logic applies, more products on one home, one install crew, and one customer relationship.6 7 8

The next step is a tighter bundled offer where Base signs up the home for power service, installs the battery, and increasingly adds solar, EV charging, and other major loads into one managed system. If that happens, Base shifts from selling a single backup device to owning more of the home energy wallet and a larger flexible power fleet for utilities.1 2 6 7 8