A Tesla vet tries to master the VPP market

Residential virtual power plants are moving from climate-tech concept to grid-scale infrastructure, and Kunal Girotra framed Lunar Energy’s strategy as an attempt to solve both the hardware and market-integration problems at once. Drawing on his experience launching Tesla’s residential energy business, Girotra argued that the U.S. home should be treated as an integrated electrification system rather than a collection of disconnected widgets. Lunar therefore builds its own batteries, inverter electronics, breaker-panel interface, and panel-level power electronics, while also selling enterprise software that can control third-party batteries. The hardware pitch is flexibility: modular 5 kWh blocks instead of a single large battery, support for solar-plus-storage or storage-only installations, and a system design meant to reduce installation complexity and wall clutter. Girotra emphasized that Lunar intentionally prioritizes batteries as the foundation of the electric home, rather than solar-only or panel-only approaches.

The conversation then shifted to software, where Lunar’s differentiation is arguably more consequential. Instead of building VPP orchestration software from zero, Lunar acquired Moixa’s GridShare platform from the UK, gaining operating history in more advanced overseas markets. At the household level, Lunar AI uses machine-learning forecasts for weather, usage patterns, and dynamic tariffs to optimize battery dispatch, EV charging, and other controllable loads. Girotra’s strongest concrete claim was economic: in California’s highly granular tariff environment, the software delivered an incremental $382-$450 per year for a 20 kWh system beyond plain self-consumption. At the grid level, he argued that “whole-home” systems are a superior DER substrate to single-device aggregations like thermostats, because they offer more telemetry, more controllability, and more flexible co-optimization between homeowner economics and system needs. He acknowledged that the technology side is ahead of utility integration, especially around SCADA and grid-control interoperability, but claimed the device and telemetry stack is already near what industry frameworks would call level-3 or level-4 VPP readiness.

The most relevant arc for infrastructure watchers came at the end, where Roberts connected VPPs to the data-center power crunch. He argued that every residential battery installation creates dispatchable grid capacity, and suggested hyperscalers could subsidize home batteries as a faster path to interconnection relief than waiting for central-station generation. Girotra agreed and said Lunar is already in discussions with hyperscalers, though regulated utility territories make these deals structurally three-party negotiations. He also highlighted policy levers: faster FERC Order 2222 implementation, wider dynamic pricing, and utility willingness to rate-base distributed batteries. Lunar plans to expand from California into eight more states in 2026, including Texas, Utah, Nevada, and New Jersey, with nationwide availability targeted for 2027. Manufacturing remains capacity constrained, but Girotra said assembly is already in Georgia and Washington, positioning Lunar systems for domestic-content bonuses that can push lease economics to as much as a 50% ITC-equivalent stack in qualifying cases.