ES Solar and sonnen have sold around 18MWh of sonnen retrofit energy storage systems via the Rocky Mountain Power initiative (Wattsmart), part of the Wattsmart programme in Utah. The company estimates that over 75% of its 2024 sales are via the Go Back initiative, resulting in 200-500 sonnen battery installations in Utah each month. Wattsmart, a VPP aggregation programme run by RMP, uses energy stored at customer sites to help manage its grid network. The RMP Wattsmart Distributed Battery Grid Management System (DBGMS) VPP now has over 40MWh capacity. Zach Randall, vice-president of sales at ES Solar, believes existing solar customers are adding an intelligent energy storage system to their solar array due to the numerous benefits a storage system can provide.

Solar Dominates US Energy Capacity Growth
The Federal Energy Regulatory Commission (FERC) has published data showing that solar accounted for over 75% of US electrical generating







