Engineers who repair other engineers' cars.

"I knew in 2017 that the independent-aftermarket hybrid + EV shop I could build would be the only viable option for Portland EV owners by 2026. The Tesla Service Center backlog was 8 weeks then. It's 14 weeks now. We are the option." — Priya Ramaswamy

Before Voltline

Toyota of Portland, 2011–2014. Tesla Portland, 2014–2018.

Priya finished her MSEE at Oregon State in 2009. She worked two short stints at semiconductor firms in Hillsboro before realizing she wanted hands on the things she was diagnosing. Her first hybrid-specialist role was at Toyota of Portland from 2011 to 2014, working on the early-generation Prius and the introduction of the Lexus hybrid line.

In 2014 she joined the Tesla Portland Service Center as a senior technician. The center had just opened. The 2014 customer base was almost entirely Model S P85 and P85D. She worked on traction packs that occasionally had to be removed and serviced module-by-module — work that, at the time, the Tesla Service Center performed in-house but increasingly migrated to "full pack replacement" in subsequent years.

The pattern she watched: service-center backlog growth from a 2-week wait in 2014 to an 8-week wait by 2017. The progressive removal of repair-level work from the Tesla Service Center workflow. The realization that a third-of-the-dealer-price independent shop, with module-level repair capability that Tesla itself was abandoning, was the obvious unfilled niche.

She left Tesla in November 2017 with a plan. She spent ten months negotiating an SBA loan, securing a four-bay shop on SE Powell, and ordering capital equipment.

Voltline, 2018

Why I started Voltline.

Voltline opened in October 2018 with $180K in SBA financing and $80K in personal savings. The 4-bay shop on SE Powell Boulevard had been a transmission specialist's shop since 1987. The previous owner had retired. Priya kept the polished-concrete floor, painted the bays cool-concrete grey, and installed the first EV-rated lift before opening day.

The early-year customer base was almost entirely Prius rebuilds — the volume work. Hybrid battery rebuild was a known-quantity service: the Hybrid Shop USA network had been doing it since the mid-2000s, the process was documented, the modules were available through verified core-exchange suppliers, and the value proposition was straightforward (replace 3–6 modules for a third of the cost of a full-pack swap).

The Tesla service work scaled from 2020 onward, after the Model 3 became Portland's most common EV. By 2023 Voltline was doing one Tesla service ticket for every three hybrid rebuilds. By 2025 the ratio had flipped to roughly even. In 2026 we are running approximately 28 service tickets per week across all platforms.

The Team

Four engineers, one shop.

The Equipment

What we have invested in.

Voltline has invested approximately $340,000 in capital equipment since 2018. Engineering-grade diagnostic capability is not optional in this work — a generic $400 OBD-II scanner cannot read Tesla BMS cell-level data, and a generic scan tool misses 90% of hybrid-system faults.

• Hofmann EV-rated 2-post lifts (4 bays) — rated for full-pack-suspended Tesla service.
• Autel MaxiSys Ultra EV + Bosch FSA-740 hybrid analyzer — full module-level diagnostic capability.
• Toyota Techstream — official Toyota factory diagnostic license.
• Hybrid Assistant + Tesla Diagnostic Pro — third-party diagnostic capability beyond what Tesla's customer-facing tools offer.
• HV-rated battery rebuild bench — custom-built, with module-level load testing (Arbin BT-2000 + Chroma 6310 DC load bank). ~$84K investment.
• Multi-voltage power-supply test bench — 24V / 48V / 96V / 400V / 800V, all-platform capable.
• IEC 60900 PPE suite — insulating gloves, mats, lockout-tagout kit, arc-flash safety equipment.

Total equipment investment as of 2026: ~$340K.

What Voltline Will Not Do

We are deeply specialized. We refer everything else.

Scope discipline is the whole point of Voltline. A shop that "works on everything" cannot be deeply good at module-level Tesla pack repair. We are deeply good at one set of things. The rest we refer.

• Body work, paint, collision — referred to Macadam Auto Body (Portland) for non-Tesla, or to a Tesla-Approved Body Shop for Tesla collision.
• Brakes (non-regen-related), alignment, tires, suspension — referred to general-purpose shops.
• Transmission (non-hybrid), exhaust, fuel-system (non-PHEV) — Voltline does not.
• Internal combustion engine repair — Voltline does NOT work on engines, except as part of hybrid powertrain diagnostic. PHEV vehicles still have ICE components we do not service in isolation.
• General-purpose ICE vehicles — Voltline does not.

"Specialization is the only honest path. If a shop tells you they 'work on everything,' they are not the shop you want for a Tesla pack module replacement." — Priya Ramaswamy