Base's Wholesale Arbitrage Strategy

Wholesale arbitrage is what turns Base from a cheap backup battery seller into a power trader with captive supply. Once the battery is installed, the extra cost to charge low and discharge high is mostly software, market access, and battery wear, so the spread can drop to gross profit more cleanly than the fixed retail power contract. In ERCOT, that matters because prices update continuously and can jump sharply during tight grid hours.1 2 3 4

• Base keeps about 80% of each home battery available for grid use, while reserving roughly 20% for backup. That means every new customer adds not just a retail load, but also another dispatchable slice of storage that can be aggregated and sold into peak intervals.1 4
• The hedge is the key economics. When ERCOT spot prices spike, Base can lose margin on the power it resells under fixed 36 month contracts, but those same spikes make battery discharge more valuable. The battery fleet offsets the retail book precisely when the retail book is under pressure.1 2 3
• The closest public comparison is Tesla Electric, which also uses home batteries as grid assets and pays customers for virtual power plant participation. The difference is that Base owns the battery and the retail relationship from day one, so it captures the full stacked margin instead of sharing more of it across separate hardware and power products.1 5 6

Going forward, the main scaling effect is simple. More installed batteries give Base more megawatts to trade, more fixed rate customers to bundle, and more leverage with utilities that want local capacity. If the company keeps growing inside ERCOT, arbitrage should become the engine that funds lower upfront pricing and faster expansion.1 4 6