149 battery storage installers filed 1,860 battery storage permits on homes in unincorporated San Diego County from October 2023 to September 2026; 87 filed one in the last 12 months. The most active in the last 12 months were Tesla Energy Operations Inc (79 permits), Sunrun (64) and Baker Home Energy (61); busy is not the same as careful. San Diego County (unincorporated) battery storage permits carry no filed job value, so this list compares firms on permits filed, finishing, license and recent activity only. Side by side: permits filed, share finished, license status and permits in the last 12 months for each firm. Pick what you value and the list re-orders.
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Top 5 by battery storage permits filed in the last 12 months. This is volume, not quality: a busy firm is not necessarily a careful one.
The 8 ZIP codes with the most battery storage permits on homes from October 2023 to September 2026. Each opens permits by trade and the most active firms there.
92065 (241) 91901 (206) 92028 (199) 92082 (146) 92040 (85) 91935 (81) 92067 (81) 92019 (79)
Before you move a slider, the list is in a default order built only from the permit record: how much of each firm’s record is this kind of job (weight 30), how often its permits reached completion (25), how many permits it filed in the last 12 months (15) and how quickly its permits closed (10). Each measure is ranked against the other 149 firms and pulled toward the middle when a record is short; a firm with a matched license problem is listed last.
The order comes from the San Diego County permit file, not from reviews: 87 of 149 battery storage installers filed a permit in the last 12 months and 89% of their permits a year or more old were finished. Nobody pays to be listed or to move up, and there are no star ratings or reviews. The sliders and presets change the weights, and the order changes with them. How the records work in San Diego County.
We do not rate contractors. In this page’s default order, which uses only the permit record through Sep 2026, the top 3 are Cosmic Solar Inc (76 permits, 97% finished), Build Brothers Inc (40 permits, 96% finished) and Baker Home Energy (278 permits, 93% finished). By permits filed alone, the most active is Baker Home Energy with 278.
149 firms are on the list; the busiest filed 79 battery storage permits in the last 12 months and the middle firm filed 2 in the whole file. Line them up on the same public measures: permits filed, share of permits finished and license status. Pick what matters to you and the list re-orders, for example recent activity if you need someone soon. The order comes from the permit record only, and nobody pays to be listed or to move up.
149 firms filed at least one battery storage permit on homes in unincorporated San Diego County from October 2023 to September 2026; 87 of them filed one in the last 12 months.
124 of the 149 battery storage installers on the San Diego County permit file match an active license, 4 match one that is expired, suspended or inactive, and 21 we could not match. A firm we could not match is not proven unlicensed: the match is by company name. Look any firm up by name or license number with CSLB license check; statuses show under each firm’s name above. How to check a contractor's license in California →
Three you can check against this page: “How many battery storage permits have you filed in San Diego County?” (the middle firm here filed 2; 87 of 149 filed one in the last 12 months); “What does your quote include: the permit fee and the county inspection?”; “Will you pull the permit in your company’s name, and when is the final inspection?” (89% of older battery storage permits here were finished). All 10 questions and how to check each →
On this page: 149 firms filed 1,860 battery storage permits from October 2023 to September 2026, and each firm’s name opens its own permit record. Every number comes from San Diego County Planning & Development Services building permits on homes in the unincorporated county (the County's open-data permit, contractor and status-history files). To see one permit itself, search the address or permit number with the San Diego County permit office. How the records work in San Diego County →
San Diego County battery storage permits carry no filed job value, so we can’t rank battery storage installers by price. Get two or three written quotes; ask whether the permit fee and the county inspection are included; shortlist from the 87 firms that filed in the last 12 months.
We do not rate or collect reviews. Instead each of the 149 battery storage installers here is shown with its permit record: 1,860 permits, the share finished and license status. Read reviews on other sites and use this page to check them against the record. Reviews vs permit records →
Every number on this page comes from San Diego County Planning & Development Services building permits on homes in the unincorporated county (the County's open-data permit, contractor and status-history files): 149 firms filed 1,860 battery storage permits on homes in unincorporated San Diego County from October 2023 to September 2026, and 87 of them filed one in the last 12 months. The middle firm has 2 permits in the whole file. A short record leaves more uncertainty, and some jobs never require a permit.
No usable job value is recorded for this permit type, so no typical cost is shown. See how we compare records.
Most San Diego County battery storage permits are filed in September (163 against an average month of 100); June is the quietest (66). When each trade is busiest in San Diego County →