EV battery, range and charging problems under California's lemon law: what counts and what the warranty really promises

An electric vehicle depends on two things working every day: the high-voltage battery and the system that charges it. If your EV's range has dropped sharply, it stops charging at home or at public stations, it shows a "service high-voltage system" warning, or it drops into reduced power, you may have a claim under California's lemon law. The Song-Beverly Consumer Warranty Act requires a manufacturer that cannot fix a covered defect after a reasonable number of attempts to buy back or replace the vehicle, and EV battery and charging defects are covered like any other.

This guide explains what counts, what battery warranties promise (and what the law does and does not require), how dealers and service centers document EV problems, how repair visits are counted and what to bring. It is general information about California law as of October 2026, not legal advice about your vehicle.

What EV battery and charging problems count?

The lemon law covers a "nonconformity," a warranty defect that substantially impairs the vehicle's use, value or safety (Civil Code § 1793.22(e)(1)). For EVs, problems drivers commonly report include:

• Charging failures: the car will not charge, stops partway, charges far slower than rated, or fails on several different chargers.
• A dead 12-volt battery even though the main battery is charged.
• High-voltage battery warnings, "reduced propulsion" or "limp" modes, or a sudden loss of drive power.
• Sudden or abnormal range loss, or a battery that will not accept a full charge.
• Battery overheating, cooling-system faults or fire-risk recalls that come with charging limits.
• Software problems that affect charging, range estimates or battery management.

You do not need to prove which component failed. The standard California jury instruction says a buyer does not need to prove the cause of a defect (CACI No. 3201).

Normal battery aging versus a defect

Every lithium-ion battery loses some capacity over time, and range changes with temperature, speed and the use of heating or air conditioning. The U.S. Department of Energy estimates that EV batteries may last "12 to 15 years in moderate climates and 8 to 12 years in severe climates," according to fueleconomy.gov. So a modest, gradual drop in range is not, by itself, a lemon.

A defect looks different: a sudden drop, capacity well below the warranty's threshold, warnings that return after repair, or a charging fault the dealer cannot fix. Whether a problem is a substantial impairment is judged by a reasonable person in your situation, considering the nature of the defect, the time and cost of repairs, whether earlier repairs worked and whether the vehicle could be used in the meantime (CACI No. 3204).

What EV battery warranties promise, and what the law requires

Many websites say federal law requires an 8-year, 100,000-mile EV battery warranty. We have not found a federal law that sets that minimum for battery-electric vehicles. The Department of Energy describes it as a manufacturer practice: "Several manufacturers of electric vehicles are offering 8-year/100,000-mile battery warranties," according to the Alternative Fuels Data Center.

California is different on paper. Regulations the California Air Resources Board adopted in 2022 as part of Advanced Clean Cars II require 2026 and later model-year zero-emission vehicles to carry a battery warranty of eight years or 100,000 miles, covering defects that cause the battery's state of health to fall below 70% for 2026–2030 models and 75% for 2031 and later (Cal. Code Regs., tit. 13, § 1962.8). In 2025, Congress rescinded the federal waiver that supported Advanced Clean Cars II. California and other states sued, and CARB readopted earlier vehicle standards in the meantime, according to a June 2026 Alston & Bird advisory. Because that dispute is not resolved, do not assume the state rule applies to your vehicle. Rely on the warranty booklet that came with it.

Manufacturer terms vary. Two examples read on the manufacturers' own sites in October 2026:

• Tesla covers the battery and drive unit for 8 years or 100,000 to 150,000 miles depending on model, with 70% minimum capacity retention, according to Tesla's warranty page. See our Tesla lemon law guide.
• Hyundai lists a 10-year, 100,000-mile hybrid/EV battery warranty for original and subsequent owners, according to Hyundai's warranty page.

Two points matter for a lemon law claim. First, a battery warranty with a capacity threshold is usually not the only warranty in play: charging hardware, software and many electrical parts may fall under the basic or EV-component coverage. Second, a lemon law claim does not require the battery to fall below the warranty's capacity number. The question is whether a covered defect substantially impairs the vehicle and could not be fixed after a reasonable number of attempts.

Reported EV battery and charging recalls

Recalls do not make a vehicle a lemon, but they show how battery defects are handled and how long fixes can take. One example: NHTSA recall 21V-560 (July 2021) covered about 57,414 2017–2019 Chevrolet Bolt EVs because the high-voltage battery "could catch fire when charged to full or nearly full capacity." Until GM replaced defective battery modules, owners were told to limit charging to 90%, avoid running below about 70 miles of range, park outside and not charge indoors overnight.

Charging-unit failures in some Hyundai and Kia EVs are covered in our guide to Ioniq 5 and EV6 ICCU lemon law claims, and plug-in hybrid issues in our Jeep 4xe guide. To search recalls and complaints for your vehicle, use our recall and complaint lookup.

How EV problems get documented

Every warranty repair order must include a printed notice of your warranty rights, and you must receive a copy when warranty work is done (Civil Code § 1793.1). EV repairs bring some extra wrinkles:

• "Could not duplicate." Charging faults are often intermittent. The visit still counts: each time you gave the vehicle to the manufacturer or its authorized repair facility for repair is an opportunity to repair, "even if [it/they] did not do any repair work" (CACI No. 3202).
• "Customer's charger" or "public charger fault." Show that the problem happens on more than one charger. Photos of error messages on two or three different stations, plus your home charger, answer this.
• Battery health checks. Ask the service center to record any battery state-of-health or capacity test result on the repair order, not just "within spec."
• Over-the-air updates. If the manufacturer pushes a software fix for your complaint, ask that it be noted on a repair order or in a service ticket. An update aimed at your problem is a repair attempt.
• App-only service. Some brands handle service through an app. Download or screenshot every service ticket, chat and invoice, since you may lose access if the vehicle is repurchased.
• Technical service bulletins. If an invoice cites a bulletin or campaign number, keep it. NHTSA lists manufacturer communications alongside recalls and complaints on nhtsa.gov.

The repair-attempt math for EVs

The Tanner Act presumption applies if, within 18 months of delivery or 18,000 miles, (1) a defect likely to cause death or serious bodily injury has been subject to repair two or more times, (2) the same defect has been subject to repair four or more times, or (3) the vehicle has been out of service for repair for more than 30 cumulative calendar days. For the first two, you must have directly notified the manufacturer at least once, if the warranty or owner's manual clearly disclosed that requirement (Civil Code § 1793.22(b)). A sudden loss of drive power or a battery fire risk may fit the two-attempt rule.

EV repairs often stall while parts ship, and battery-pack replacements can take weeks, so the 30-day route matters. Days add up across visits. Separately, warranty repairs must be finished within 30 days unless you agree in writing to more time, apart from delays beyond the manufacturer's control (Civil Code § 1793.2(b)). The presumption is not required to win: a reasonable number of attempts can be found with fewer visits or after 18 months. See how many repair attempts the lemon law requires.

A hypothetical example. Dana leases an EV with a $48,000 price. At 3,000 miles it stops charging at home; the service center finds nothing. At 5,500 miles it fails at two public chargers, and the onboard charger is replaced, taking 19 days. At 8,000 miles it fails again, and the car waits 14 days for parts. That is 33 days out of service within the first 18 months, past the 30-day line. The offset would use the 3,000 miles at the first visit: $48,000 × 3,000 ÷ 120,000 = $1,200. These numbers are illustrative only.

What a buyback includes

A repurchase generally refunds the price paid or payable, taxes, registration and incidental costs such as towing and rentals, minus the mileage offset (Civil Code § 1793.2(d)(2)). A willful violation can add a civil penalty of up to two times actual damages, and a buyer who wins recovers attorney's fees and costs (Civil Code § 1794).

What to bring to a lawyer

• Your purchase or lease contract, warranty booklet and any battery warranty terms.
• Every repair order and service ticket, including app chats and "could not duplicate" visits.
• Screenshots of charging errors, range readings at full charge over time, and battery warnings, with dates.
• Records showing which chargers failed, including your home charger installation paperwork.
• Towing, rental and rideshare receipts and a calendar of days out of service.
• Recall notices and any letters or case numbers from the manufacturer.

Deadlines

For manufacturers that opted in to the 2025 procedures, a lawsuit generally must be filed within one year after the warranty expires and no later than six years after delivery, with time added for days in the shop (Code of Civil Procedure § 871.21), and a buyer seeking civil penalties must send written notice at least 30 days before suing (§ 871.24). The opt-in list is reported; check the Department of Consumer Affairs list. For other manufacturers, the deadline is generally four years under the Commercial Code's warranty statute of limitations, and tolling rules can apply. Call promptly.

How LaCour handles EV lemon law claims

LaCour Trial Lawyers handles California lemon law claims statewide, in English and Spanish, with trial counsel leading each case. When a claim succeeds, the manufacturer pays the buyer's attorney's fees and costs. Send us your repair records for a free, confidential review.

Frequently asked questions

This guide is general information about California and federal law and about public records as of its date. It is not legal advice, and reading it or contacting us does not create an attorney–client relationship. Allegations in lawsuits are claims, not findings. Prior results do not guarantee a similar outcome. Attorney advertising.