California has become the first state to require laboratory safety certification for all e-bikes sold within its borders. Assembly Bill 544, which took effect in 2026, mandates that every e-bike sold or leased in California must be tested by an accredited laboratory and comply with UL 2849 or an equivalent recognized safety standard. The law also requires all e-bikes to be equipped with either a red reflector or a solid or flashing red light with a built-in reflector, used during all hours of operation.
This is a significant regulatory shift — and it will affect what you can buy, where you can buy it, and how much it costs.
What the Law Requires
The core requirement is straightforward: starting in 2026, every new e-bike sold or leased in California must carry certification from a Nationally Recognized Testing Laboratory (NRTL) confirming compliance with UL 2849. This is the same standard that covers electrical safety for e-bike systems including batteries, chargers, motors, and controllers.
UL 2849 testing evaluates e-bikes for risks including battery overheating, electrical faults, fire hazards, and charging system failures. It is a comprehensive safety standard that covers the entire electrical system, not just the battery pack. E-bikes that pass receive a certification mark that retailers can verify.
The visibility requirement is equally significant. All e-bikes must now have a red reflector or red light visible from the rear during all hours — not just at night. This is a departure from previous regulations that only required lights during darkness and represents California’s response to data showing that a significant proportion of e-bike incidents occur during daylight hours.
Why California Acted
The law is a direct response to safety concerns that have been mounting for years. E-bike battery fires have made national headlines, with incidents in apartment buildings and bike shops causing fatalities and property damage. Many of these fires have been traced to uncertified batteries — either from budget manufacturers that skip safety testing or from aftermarket replacement batteries that are not compatible with the e-bike’s electrical system.
California’s approach differs dramatically from New Jersey, which recently took the controversial step of requiring license and insurance for all e-bike riders. Where New Jersey focused on rider regulation, California is targeting the product itself — ensuring that only safe, tested e-bikes reach consumers in the first place. Industry observers generally view California’s approach as more effective at addressing the root cause of safety incidents.
At the federal level, there is also movement. A new federal bill targets e-bike safety standards for the first time in 24 years, though it remains unclear when or if it will pass. California’s law effectively sets a de facto national standard, as manufacturers are unlikely to produce separate uncertified models for other states when their largest market demands certification.
What This Means for Current E-Bike Owners
If you already own an e-bike in California, the certification requirement does not retroactively apply to your existing bike. You can continue riding your current e-bike legally. However, the visibility requirement does apply to all riders — you need a rear red reflector or light on your bike regardless of when you purchased it.
The bigger concern for current owners relates to replacement batteries. As uncertified batteries become harder to find through legitimate retail channels in California, owners of budget e-bikes may face challenges sourcing compatible replacements. This is actually an intended consequence of the law — the goal is to push the entire supply chain toward certified components.
If you are unsure about your battery’s certification status, check for a UL mark on the battery pack itself. Major brands including Bosch, Shimano STEPS, Brose, and Yamaha have been using UL-certified batteries for years. The risk primarily lies with direct-to-consumer brands sold through marketplaces like Amazon and AliExpress, where certification claims can be difficult to verify.
What This Means for New Buyers
If you are shopping for a new e-bike in California, the law effectively creates a quality floor. Every e-bike you can legally purchase from a California retailer will have passed independent safety testing. This is good news for consumers, though it may push prices slightly higher as manufacturers absorb certification costs.
The brands most affected are ultra-budget manufacturers that have been selling e-bikes in the $300 to $600 range without UL certification. Some of these brands will invest in certification to maintain market access; others will exit the California market entirely. For buyers, this means fewer bargain-basement options but greater confidence that what you are buying will not catch fire in your garage.
How to Check If Your E-Bike Is Compliant
Here is a practical checklist for California e-bike riders and buyers.
Check for a UL certification mark. Look for the UL logo on the battery, charger, and the e-bike frame or motor housing. The mark should reference UL 2849 or UL 2271 (the battery-specific standard).
Verify with the manufacturer. If you cannot find a physical UL mark, contact the manufacturer directly and ask for their UL certification documentation. Reputable manufacturers will provide this readily.
Check UL’s online database. UL maintains a searchable product database where you can verify certifications by manufacturer name or model number.
Install a rear light or reflector. Regardless of your bike’s certification status, ensure you have a red reflector or red light visible from the rear. This is now required at all times while riding, not just at night.
Avoid aftermarket batteries from unknown sources. If your battery needs replacement, purchase directly from the e-bike manufacturer or an authorized dealer. Aftermarket batteries are the single biggest fire risk in the e-bike ecosystem.
The Bigger Picture
California’s law sits within a larger national conversation about how to regulate e-bikes as they become a mainstream transportation option. The care and maintenance of e-bike batteries remains a critical safety issue, and California’s certification requirement is the most aggressive step any state has taken to address it at the product level.
As California goes, so often goes the nation. If this law proves effective at reducing battery fire incidents — and early signs suggest it will — expect other states to follow with similar certification requirements within the next two to three years. For riders and the industry alike, this is the beginning of a new era of regulated, safer e-bike ownership.
