CalCars

CalCars, also known as the California Cars Initiative, was a United States charitable nonprofit organization founded in 2002 to accelerate the adoption of plug-in hybrid electric vehicles (PHEVs). Its central argument was that transportation emissions and oil dependence could be reduced more quickly by adapting existing hybrid vehicles to accept electricity from the grid, rather than waiting exclusively for entirely new vehicle platforms or nationwide hydrogen infrastructure. The organization emerged from a founding meeting organized by Felix Kramer with co-sponsorship from Hypercar in Palo Alto, California. Its early work shifted attention away from longer-term hydrogen fuel-cell concepts and toward a near-term plug-in hybrid approach based on existing vehicles, household electricity, and technologies that could be demonstrated immediately. CalCars combined technical experimentation with communications and advocacy. It sought to prove that hybrid vehicles could be converted into plug-ins, document the work openly, demonstrate the resulting vehicles to the public and decision-makers, and encourage established automakers to manufacture PHEVs at scale. Its most important technical project was PRIUS+, an open-source conversion of the second-generation Toyota Prius. Working with engineer Ron Gremban and other contributors, CalCars completed an initial conversion in 2004 using a lead-acid battery pack. The project demonstrated that a production hybrid could be modified to draw substantial energy from the electrical grid while retaining its gasoline engine for longer journeys. Subsequent vehicles and demonstrations reported fuel economy exceeding 100 miles per U.S. gallon under suitable operating conditions. The PRIUS+ concept became a reference point for independent conversion companies and for wider discussions about aftermarket plug-in hybrid technology. CalCars used its converted vehicles as advocacy tools. It displayed them at public events, media briefings, universities, and government venues, including the United States Congress. In May 2006, Kramer brought a converted vehicle to Washington, D.C., for a public presentation on Capitol Hill, an event intended to make the emerging PHEV concept visible to national policymakers. The organization also published technical information, circulated analysis of automaker announcements, supported media coverage, and connected vehicle owners and advocates with manufacturers. The initiative promoted both new PHEV production and the possibility of converting large numbers of vehicles already on the road. From 2008 onward, it explored whether existing fuel-intensive pickups, sport-utility vehicles, vans, and other internal-combustion vehicles could be converted more rapidly than the national fleet could be replaced through new-car sales. CalCars argued that conversion could complement vehicle retirement and provide an energy-saving pathway, but the effort did not produce a durable mass-conversion industry. Conversion businesses entered and later contracted, and aftermarket standardization and policy support remained limited. CalCars regarded the announcements of mass-produced plug-in hybrids and battery-electric vehicles expected around 2010 as a preliminary success for its broader campaign. In November 2009, it began directing supporters toward organizations such as the Electric Auto Association, Plug In America, and the Sierra Club. The organization was active until approximately 2010, when mass-produced plug-in vehicles began reaching the market. Its legacy lies in helping make plug-in hybrid technology understandable to the public, demonstrating practical conversions before major manufacturers offered them, and contributing to the early American PHEV advocacy network.

CalCars began in 2002 as the California Cars Initiative, a nonprofit effort associated with Felix Kramer and a founding meeting in Palo Alto, California. The initiative was created to promote practical alternatives to petroleum-fueled transportation and initially considered the broader clean-transportation debate before concentrating on plug-in hybrid electric vehicles. Its chosen approach was intentionally incremental: use an existing hybrid drivetrain, add battery capacity and charging capability, and allow the vehicle to continue using its internal-combustion engine when required. The organization combined advocacy with hands-on engineering. Kramer recruited Ron Gremban as technology development lead, and CalCars worked with contributors connected to the University of California, Davis, including Professor Andrew A. Frank and the Team Fate design group. Their principal project, PRIUS+, converted a 2004 Toyota Prius into a plug-in hybrid. The first conversion, completed in 2004, used lead-acid batteries and served primarily as a proof of concept. CalCars documented the work openly and promoted the resulting vehicle as a platform that could inspire other builders, conversion companies, researchers, and automakers. The organization’s work was not limited to prototypes. CalCars displayed converted vehicles at public and private events, communicated with journalists, reviewed books and technical developments, and maintained online information and discussion channels. It presented its vehicles to political leaders and opinion-makers, emphasizing that charging could use ordinary 120-volt household power and, potentially, electricity generated during off-peak periods or from renewable sources. Its environmental vision combined electric driving for routine travel with lower-carbon fuels for the remaining use of the combustion engine. A major visibility milestone came in 2006, when Felix Kramer became an early nontechnical consumer owner of a converted PHEV and transported the vehicle to Washington, D.C. for a public viewing on Capitol Hill. This helped position plug-in hybrids as a policy and industrial issue rather than merely an experimental engineering project. CalCars also maintained pages tracking automaker announcements, encouraged owners and advocates to communicate with manufacturers, and supported efforts to persuade large automakers to build factory-produced plug-in hybrids. The PRIUS+ design became an open-source reference for a number of independent conversion efforts. Companies and projects associated with the wider conversion field included A123 Hymotion, Amberjac Systems, EDrive Systems and its successor relationships, EETrex, Enginer, Hybrid Electric Vehicle Technologies, Plug-In Conversions Corporation, Plug-In Supply, and MD-Tech. CalCars did not own these companies; rather, it operated as an advocate and demonstrator within an expanding but fragmented aftermarket ecosystem. By 2008, CalCars was increasingly concerned that even optimistic sales of new plug-in vehicles would electrify the national fleet slowly because vehicles remain on the road for many years. It therefore promoted the idea of converting existing gasoline-intensive vehicles, especially pickups, SUVs, and full-size vans. The organization argued that retaining and converting suitable vehicles could save energy compared with scrapping them and replacing them only through new-vehicle purchases. The proposed mass-conversion industry did not develop at the scale CalCars sought. Attempts to organize aftermarket converters and secure favorable government incentives were unsuccessful, while the conversion market later contracted substantially. CalCars continued to support public understanding of plug-in technology and tracked developments through its communications channels into the early 2010s. In November 2009, it described the imminent arrival of mass-produced PHEVs and electric vehicles as a preliminary victory for its campaign. As the commercial market began to materialize, CalCars moved supporters toward the Electric Auto Association, Plug In America, and the Sierra Club. The organization was active until about 2010. Its historical significance is therefore less as a continuing commercial brand than as an early nonprofit catalyst that demonstrated PHEVs, supplied open technical examples, and helped build demand before major automakers entered the mass market.

• 2010

  CalCars becomes inactive

  [1]CalCarsen.wikipedia.org

  The organization was active until approximately 2010, when the first mass-produced plug-in hybrid vehicles began arriving.

• 2009

  Organization announces a preliminary campaign victory

  [1]CalCarsen.wikipedia.org

  CalCars pointed to the approaching launch of mass-produced plug-in hybrids and electric vehicles as evidence that its central policy and market objective was gaining traction.

• 2008

  Existing-vehicle conversion strategy expands

  [1]CalCarsen.wikipedia.org

  CalCars began advocating broader conversion of existing combustion vehicles, including larger and less efficient vehicle types, to accelerate electrification.

• 2006

  PHEV is presented on Capitol Hill

  [1]CalCarsen.wikipedia.org

  Felix Kramer brought a converted Prius to Washington, D.C., for one of the early public presentations of a plug-in hybrid on Capitol Hill.

• 2004

  First PRIUS+ conversion is completed

  [1]CalCarsen.wikipedia.org

  CalCars and its collaborators completed the first plug-in conversion of a Toyota Prius, initially using a lead-acid battery pack to establish technical feasibility.

• 2002

  California Cars Initiative is founded

  [1]CalCarsen.wikipedia.org

  A Palo Alto founding meeting organized by Felix Kramer led to the creation of the nonprofit initiative that became known as CalCars, with a focus on accelerating plug-in hybrid vehicles.

A nonprofit technology-demonstration and advocacy organization focused on accelerating plug-in hybrid adoption as a practical response to petroleum dependence and transportation-related greenhouse-gas emissions.

• Plug-in hybrid conversion · 2004

  PRIUS+

  PRIUS+ was CalCars’ best-known technical demonstration: an open-source conversion of a second-generation Toyota Prius into a plug-in hybrid. The initial 2004 build used lead-acid batteries to show that a production hybrid could be adapted for grid charging while retaining its gasoline engine. The project became an influential reference for later independent conversion kits and helped make plug-in hybrid technology tangible to journalists, policymakers, automakers, and vehicle owners.

• Technical information · 2004

  Open-source PHEV conversion documentation

  CalCars published and promoted technical information derived from its prototype work so that researchers, enthusiasts, and conversion businesses could study practical plug-in hybrid approaches. The documentation was part of the organization’s strategy to encourage a wider ecosystem rather than keep the conversion design as a proprietary commercial product.

• 2008Mass conversion of existing vehicles

  United States

  CalCars advocated converting existing fuel-intensive vehicles, including pickups, SUVs, and vans, to plug-in operation rather than relying solely on replacement through new-vehicle sales.

  Outcome. The initiative did not create the large, coordinated conversion industry that CalCars sought, and the aftermarket later contracted.

  Source
• 2006Capitol Hill PHEV outreach

  United States

  CalCars brought a converted Prius to Washington, D.C., and displayed it on Capitol Hill to reach national policymakers and opinion leaders.

  Outcome. The event increased the visibility of plug-in hybrids in federal policy and public communications.

  Source
• 2004PRIUS+ public demonstration program

  United States

  CalCars used converted Prius vehicles, technical documentation, videos, and public presentations to demonstrate the feasibility and potential fuel savings of plug-in hybrids.

  Outcome. The open conversion became a reference model for other PHEV conversion efforts and contributed to growing interest in the technology.

  Source
• 2002Plug-in hybrid advocacy campaign

  United States

  CalCars promoted PHEVs as a near-term means of reducing oil dependence and transportation emissions, emphasizing existing vehicle technology and ordinary household electricity rather than waiting for entirely new infrastructure.

  Outcome. The campaign helped establish PHEVs as a subject of public, media, and policy discussion before mass-market vehicles were available.

  Source

• 2009

  Transition supporters to larger electrification organizationsStrategy

  Background

  Mass-produced plug-in hybrids and battery-electric vehicles were expected to enter the market, reducing the need for CalCars to act as the primary demonstration platform.

  Action taken

  CalCars began directing drivers and advocates to the Electric Auto Association, Plug In America, and the Sierra Club.

  Aftermath

  The initiative became inactive around 2010 after its core market-formation objective had begun to materialize.

  Source

• 2008

  Pursue conversion of vehicles already on the roadStrategy

  Background

  CalCars recognized that replacing the vehicle fleet through new-car sales would take many years even if plug-in vehicles achieved strong market growth.

  Action taken

  It promoted the conversion of existing combustion vehicles, particularly large fuel-consuming models, as a complementary route to electrification.

  Aftermath

  The conversion industry remained fragmented and did not reach the scale needed for mass adoption.

  Source

• 2002

  Shift focus toward plug-in hybridsStrategy

  Background

  CalCars sought a practical transportation technology that could be demonstrated with existing vehicles and household electrical power.

  Action taken

  It concentrated its advocacy and technical work on plug-in hybrid vehicles rather than making hydrogen fuel cells its primary near-term solution.

  Aftermath

  This focus shaped the organization’s conversion projects, public demonstrations, and automaker advocacy.

  Source

1. 1CalCarsen.wikipedia.org
2. 2CalCars official websitecalcars.org