Final Verdict
The Energym RE:GEN is one of the most innovative fitness products we have seen. It is a legitimate smart indoor bike with a genuinely useful power-generation feature. At £2,249 it demands a premium, but for riders who value sustainability and want their workouts to power their devices, it is a compelling and one-of-a-kind investment.
An average workout session generates between 170Wh and 230Wh of energy. This is enough to fully charge the 90Wh OHM battery pack, which can then charge a MacBook Pro nearly 3 times, an iPhone about 10 times, or an iPad Pro around 4 times.
No. The RE:GEN is designed to charge small electronic devices via its portable OHM battery pack, not to supply household electricity. A typical workout generates around 200Wh, which is enough on a practical level for charging phones, laptops, and tablets — not powering appliances.
The OHM has two USB-C ports with 60W Power Delivery, so it can charge any USB-C device including laptops, smartphones, tablets, smartwatches, wireless earbuds, portable speakers, and cameras. It can also be charged itself via a wall outlet when needed.
Yes. The RE:GEN connects via Bluetooth Low Energy (BLE) and is fully compatible with Zwift and other third-party cycling apps. It transmits power data with ±5% accuracy for a realistic virtual riding experience.
The RE:GEN is priced at £2,249 (approximately $2,800 USD). You can reserve one with a £100 deposit and pay the remaining £2,149 balance when it is ready to ship. Delivery is estimated at 4-6 weeks from order. Shipping is free in the UK, with £139 for EU delivery.
No. The RE:GEN operates completely independently of external power. It generates its own electricity from your pedaling, so it does not need to be plugged in. The OHM battery can optionally be charged from a wall outlet, but the bike itself requires no socket.
The RE:GEN has a footprint of 120 x 56 cm (approximately 3 feet 9 inches by 1 foot 8 inches), which is similar to most indoor exercise bikes. It weighs 55 kg (120 lbs), so it is quite heavy but stable. It can accommodate riders from 147 cm to 196 cm (4 feet 10 inches to 6 feet 5 inches) tall.
Robert DeWitt writes and tests off-grid power gear for Off Grid Power Boom. Based in Arizona, he uses portable power stations, solar panels, and battery systems regularly in extreme heat—focusing on practical runtime, charging speed, reliability, and real-world usability for camping, RV trips, and home backup.
Editorial focus: portable power stations & solar generators, solar panel setups, batteries/inverters, and off-grid preparedness.