SDG&E Commercial Rates 2026: TOU, CCA, and Demand-Cost Planning
Among major Investor-Owned Utilities (IOUs), San Diego Gas & Electric (SDG&E) remains one of the most expensive tariff environments for many California commercial accounts. As 2026 unfolds, wildfire mitigation, grid hardening, delivery infrastructure, and clean-energy transition costs flow through a relatively small San Diego ratepayer base. Commercial operators face high AL-TOU exposure, making behind-the-meter generation, battery storage, load scheduling, and CCA (Community Choice Aggregation) review worth modeling account by account.
Executive Impact
- →The Math Problem: SDG&E operates in a dense, geographically restricted area. Compared with PG&E or SCE, a smaller ratepayer base can make grid and wildfire-related cost recovery more visible on a per-kWh and demand-charge basis.
- →Delivery vs. Generation: Even if a business uses a CCA to purchase generation differently, SDG&E delivery charges remain non-bypassable and must be modeled separately from the generation component.
- →The 4 PM to 9 PM Execution: Like the rest of CAISO, SDG&E operates on steep Time-of-Use tariffs. Heavy HVAC or process load during 4:00 PM to 9:00 PM can materially worsen bills unless operators use scheduling, thermal mass, controls, or storage to reduce peak exposure.
Navigating the SDG&E AL-TOU Tariff
The baseline schedule for many medium-to-large commercial and industrial facilities in San Diego has historically been the AL-TOU family, with April 2026 class changes creating separate medium and large business paths. Peak-window exposure can be material when demand lines up with higher-cost hours.
When the CAISO duck-curve ramp tightens late-day system conditions, SDG&E's time-of-use design rewards customers that can shift or flatten load. A commercial building manager should understand Non-Coincident Demand (NCD) versus On-Peak Demand, because both maximum facility demand and the timing of that demand can change the bill materially.
Community Choice Aggregators (CCAs)
San Diego County has aggressively embraced CCAs, primarily San Diego Community Power (SDCP) and Clean Energy Alliance (CEA).
Under this model, the local government entity acts as the generation provider, while SDG&E maintains the physical wires and issues the unified bill. Buyers should compare CCA generation rates, program mix, and exit or opt-out rules against the bundled utility option.
The Reality Check: While businesses should review their CCA enrollment status (which is often automatic/opt-out), CCAs can only modify the "Generation" charges. Delivery charges for poles, wires, transformers, and wildfire prevention remain separate, so joining a CCA does not by itself solve the full bill.
Planning Around Non-Bypassable Delivery Costs
Because delivery charges are non-bypassable in SDG&E territory, commercial operators should compare localized investments against their own interval data before assuming a simple tariff switch will solve the bill. The 2026 playbook often includes:
- BESS (Battery Energy Storage Systems): Modeling California incentives and battery dispatch against measured on-peak and non-coincident demand.
- NEM 3.0 Solar Integration: Treating rooftop solar primarily as an internal load-offset and battery-charging resource, with export-credit assumptions modeled from the applicable Net Billing Tariff values rather than assumed at full retail value.