Costa Mesa · Orange County · 18 Panasonic 420HK modules · 2 Tesla Powerwall 3 units
Solar + Dual Powerwall 3 in Costa Mesa
A completed Costa Mesa solar-and-storage project with 18 Panasonic 420HK modules, two Tesla Powerwall 3 units, and SCE Permission to Operate.
18 Panasonic 420HK
Solar modules
2 Tesla Powerwall 3 units
Storage
SCE PTO · May 9, 2025
Utility approval
The completed project
OC Solar's completed-project record identifies this as a residential solar-and-battery installation in Costa Mesa. The equipment record lists 18 Panasonic 420HK modules, two Tesla Powerwall 3 units, and a Backup Switch on Southern California Edison service.
The installation was completed on February 7, 2025, and the project received SCE Permission to Operate on May 9, 2025. Customer name, street address, financial information, and production estimates are intentionally excluded.
Why two batteries matter
Two Powerwall 3 units provide more stored energy and discharge capability than a single unit. That can support a larger configured backup plan or carry more household energy into SCE's evening period, although actual performance depends on home loads, reserve settings, weather, and system configuration.
Representative of OC Solar's 6,373 Southern California projects & service calls. System size, equipment, and timelines vary by home; figures shown are project specifications, not guaranteed savings.
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Licensed, Bonded & Insured · CSLB #1023627