# Repairing an Electric Car Battery in Chile | Ecobaterías > What actually fails inside a lithium battery pack, what state of health (SOH) means, when a repair pays off and where to test EV batteries in Chile. Canonical: https://ecobaterias.org/en/articulo-reparar-bateria-auto-electrico.html · Language: en · Alternate (es): https://ecobaterias.org/articulo-reparar-bateria-auto-electrico.html · Updated: 2026-09-19 Practical guide # Can an electric car battery be repaired in Chile? The whole pack almost never fails. A module fails, or a contactor, a sensor, or the management electronics. This guide explains how to tell them apart and what to decide in each case. [Request battery testing](https://ecobaterias.org/en/contacto.html?segmento=diagnostico) [Message us on WhatsApp](https://wa.me/56940118111?text=Hi%2C%20I'd%20like%20a%20quote%20for%20managing%20our%20lithium%20batteries.) By the Ecobaterías technical teamPublished September 15, 2026Updated September 19, 2026Reviewed by the EPR compliance lead **Yes, in most cases.** An electric vehicle pack rarely fails as a whole: one module fails, or the management electronics, a contactor or a sensor. With testing and a component swap, the pack returns to service for a fraction of the cost of a new one. Ecobaterías runs the testing and issues a state-of-health certificate as part of its 2026–2027 pilot program, with limited capacity; what is not worth repairing goes to second life or to recycling at its Santiago plant. - **Direct reuse:** SOH ≥ 90% - **Refurbishment:** SOH ≥ 80% - **Second life:** SOH 65–80% - **Recycling:** SOH < 65% Source: [Ecobaterías testing protocol](https://ecobaterias.org/en/diagnostico-baterias-litio.html) · 2026-09-18 ## What actually fails in a lithium battery A vehicle pack holds between 4 and 30 modules, each with dozens of cells, plus a battery management system (BMS), contactors, fuses, sensors and a cooling circuit. The vehicle shows a single symptom — range loss, a fault code, reduced power — for causes sitting in very different layers. In practice, failures fall into four families: **cell or module** (one branch drifts out of balance and drags the whole pack down), **electronics** (BMS, temperature sensors, communication), **power path** (contactors, fuses, connectors, harnesses) and **thermal** (pump, coolant, leaks). Only the first involves touching cells; the other three are solved by replacing a part. That is why the expensive mistake is diagnosing from the fault code and quoting a new pack. The code says where the problem showed up, not where it is. ## What state of health is and how it is measured State of health (SOH) is the battery’s current usable energy expressed as a percentage of its value when new. The vehicle’s BMS estimates it from its own history, but that estimate can drift by several points: it calibrates with use, and a pack that sat idle, changed owners or went through a thermal event carries a stale estimate. Independent testing cross-checks that reading with measurements of its own: insulation, cell voltage, internal resistance, a capacity test and, in the lab, incremental capacity analysis or impedance spectroscopy. Testing a pack takes between 30 minutes and 6 hours depending on the format and on access to the modules. Source: [Ecobaterías testing protocol](https://ecobaterias.org/en/servicios.html) · 2026-09-18 Once SOH is measured, the decision stops being an opinion. The four routes — direct reuse, refurbishment, second life and recycling — are described in detail in [lithium battery testing and repair](https://ecobaterias.org/en/diagnostico-baterias-litio.html), with the thresholds in the table above. *Modules are tested one by one: the pack average hides the branch that is failing.* ## When repair is not worth it - **Severe mechanical damage, swelling or a thermal event.** The battery is isolated and recycled; it is neither repaired nor resold. - **Uniform degradation.** If every module dropped together, swapping one does not give range back. - **No spare, or a disproportionate one.** When the module cannot be sourced or costs close to the value of the vehicle, second life or recycling recovers more value. - **Unknown history with signs of thermal abuse.** A pack with no traceability and evidence of overheating does not go back into a vehicle. ## Electric buses and storage systems The logic is the same, with larger modules and maintenance contracts in the middle. In October 2025, RED Movilidad operated **3,544 electric buses**, around 55% of the Santiago fleet, and as of February 2026 the country had **4,088 electric buses**. Sources: [Chilean Ministry of Transport and Telecommunications](https://www.mtt.gob.cl) (2025-10-31) and Latamobility (2026-02-28), compiled by Ecobaterías The first cohort, the one that entered service between 2017 and 2019, reaches the end of its leasing and maintenance contracts in 2028–2029: on the order of 200 buses of 324 kWh, that is, some 500 to 650 metric tons of packs that will need testing to choose between life extension, refurbishment or removal. That case is developed in [electric bus batteries in Chile](https://ecobaterias.org/en/electric-bus-batteries.html). Source: Ecobaterías estimate for the 2017–2019 cohorts, based on compiled public sources · 2026-09-18 In stationary storage, the National Electrical Coordinator recorded **3,072 MW / 13,528 MWh** of BESS in operation and testing in April 2026. That is capacity connected to the grid, not waste: modules removed under warranty or during repowering usually have high SOH and are natural second-life candidates, as explained in [end-of-life BESS](https://ecobaterias.org/en/bess-end-of-life.html). Source: [National Electrical Coordinator](https://www.coordinador.cl), capacity in operation and testing as of April 2026, reported by the trade press · 2026-04-30 ## What Chile’s EPR law says The [EPR law for batteries (Ley 20.920, Law No. 20,920)](https://ecobaterias.org/en/chile-epr-law-batteries.html) puts reuse ahead of recycling. The Ministry of the Environment’s draft battery decree proposes collection targets for lithium-ion batteries — no target for the first two years, 15% in the third and 50% from the tenth — and that at least 30% of the target be met through preparation for reuse. It is a text in consultation, not a rule in force: the ministry’s deadline to propose the decree is **January 29, 2027**. Source: [Chilean Ministry of the Environment, draft battery decree (Res. Ex. 821/2026)](https://consultasciudadanas.mma.gob.cl/portal) · 2026-09-18 Meanwhile Supreme Decree (DS) 148/2003 applies: a discarded battery is hazardous waste and its generator must manage it through licensed carriers and licensed recipients. Before hiring anyone, it is worth reviewing what to demand from an [authorized lithium battery waste manager in Chile](https://ecobaterias.org/en/authorised-battery-waste-manager-chile.html). For photovoltaic modules, by contrast, the calendar is already fixed by [Supreme Decree (DS) 22/2025](https://ecobaterias.org/en/ds-22-2025-solar-panels-epr.html). ## Where to test and repair in Chile Ecobaterías receives vehicle, bus, storage and micromobility packs in Santiago, tests them under a five-stage protocol and issues a state-of-health certificate, a per-module report and a valorization certificate for whatever goes to recycling. If your case is a one-off handover rather than testing, the route is in [where to recycle lithium batteries in Chile](https://ecobaterias.org/en/where-to-recycle-lithium-batteries-chile.html). What cannot be repaired and does not qualify for second life is processed at our hydrometallurgical plant, authorized by the Seremi de Salud of the Santiago Metropolitan Region (Chile’s regional health authority) for the hydrometallurgical process ([compliance and permits](https://ecobaterias.org/en/cumplimiento.html)). Based on our review of licensed waste managers as of September 2026, we are not aware of another plant in Chile that recycles lithium-ion batteries and sells the recovered mineral to mining; the documentation is available to counterparties under due diligence. ## Frequently asked questions ### Can an electric car battery be repaired in Chile? In most cases the pack does not fail as a whole: one module fails, or the management electronics, a contactor or a sensor. With testing and a component swap, the pack returns to service. Ecobaterías runs the testing and issues a state-of-health certificate as part of its 2026–2027 pilot program, with limited capacity. ### What is state of health (SOH) and how is it measured? State of health is the battery’s current usable energy as a percentage of its value when new. The vehicle’s management system estimates it, but that estimate can drift, so independent testing combines the reading with insulation, cell voltage, internal resistance and capacity tests. ### When is repair not worth it? When there is severe mechanical damage, swelling or a thermal event; when degradation is uniform across every module; and when the replacement module does not exist or costs more than the vehicle is worth. In those cases second life or recycling recovers more value than repair. ### What about electric bus and BESS batteries? They follow the same logic, with larger modules and maintenance contracts in the middle. The first cohort of Santiago buses reaches the end of its contracts in 2028–2029, and those packs will need testing to choose between life extension, refurbishment or removal. ### What does Chile’s EPR law say about repair before recycling? Law No. 20,920 puts reuse ahead of recycling. The draft battery decree also proposes that at least 30% of the lithium-ion target be met through preparation for reuse, but it is a text in consultation: the ministry’s deadline is January 29, 2027. **Sources:** IEC 63330-1:2024, *Requirements for reuse of secondary batteries — Part 1: General requirements* (reference standard, cited by name). · ANSI/CAN/UL 1974, *Evaluation for Repurposing Batteries* (reference standard, cited by name). · [Ley 20.920 (Chile’s EPR law), Library of the National Congress of Chile](https://www.bcn.cl/leychile/navegar?idNorma=1090894). · [Chilean Ministry of the Environment, draft battery decree (Res. Ex. 821/2026)](https://consultasciudadanas.mma.gob.cl/portal). · Supreme Decree (DS) 148/2003 on hazardous waste management. · [National Electrical Coordinator](https://www.coordinador.cl), storage capacity in operation and testing as of April 2026. · [Chilean Ministry of Transport and Telecommunications](https://www.mtt.gob.cl) and Latamobility, electric bus fleet. · Ecobaterías testing protocol, as of September 18, 2026, with the figures published in `datos/estadisticas.json`. Updated September 19, 2026 · Reviewed by the Ecobaterías EPR compliance lead **Ecobaterías technical team.** Ecobaterías recycles lithium batteries in Chile and returns the recovered minerals to mining. The battery testing and repair line runs as a 2026–2027 pilot program with limited capacity. ## Fault code, or range that keeps dropping? Tell us the model, year and symptom. We will tell you which test applies, how long it takes and what information you get before choosing between repair, second life and recycling. - Process authorized by the Seremi de Salud RM (regional health authority) - Cobalt sulfate tested at Codelco El Teniente: 22% lower cost - We reply within 48 business hours - Valorization certificate for your EPR reporting [Request testing](https://ecobaterias.org/en/contacto.html?segmento=diagnostico) [contacto@ecobaterias.org](mailto:contacto@ecobaterias.org) [+56 9 4011 8111](tel:+56940118111) ## Keep reading ### [Lithium battery testing and repair](https://ecobaterias.org/en/diagnostico-baterias-litio.html) Failure modes, test protocol and what can be repaired inside a lithium-ion pack. ### [Second-life batteries](https://ecobaterias.org/en/second-life-batteries.html) When a decommissioned module is fit for stationary storage. ### [How to prepare end-of-life batteries](https://ecobaterias.org/en/articulo-preparar-baterias.html) Storage, packaging and labeling before a pickup with licensed transport. --- contacto@ecobaterias.org · WhatsApp +56 9 4011 8111 · Santiago, Chile. Ecobaterías recycles lithium batteries in Chile and returns the recovered minerals to mining.