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Bosch eBike System 2 (BES2)Does the Bosch PowerPack 300 (eBike System 2) fit a Bosch eBike System 2 (BES2) bike?
Whether the Bosch PowerPack 300 (eBike System 2) fits a Bosch eBike System 2 (BES2) e-bike, and what to confirm on your own frame first.
Yes, with the right mount. The Bosch PowerPack 300 (eBike System 2) is the native pack for a Bosch eBike System 2 (BES2) bike (300 Wh, 36 V), charged through the Bosch eBike System 2 oval charge port.
| Battery | Bosch PowerPack 300 (eBike System 2) (300 Wh, 36 V) |
|---|---|
| Native drive system | Bosch eBike System 2 (BES2) |
| Verdict | fits (native pack) |
| Charge port | Bosch eBike System 2 oval charge port |
| Will not fit | a different drive system, or a different Bosch/Shimano generation even if the shape matches |
The Bosch PowerPack 300 (eBike System 2) is proprietary to the Bosch eBike System 2 (BES2) drive, so it fits that system and no other. The PowerPack 300 is the small rack-mount BES2 pack for short journeys. It shares the rack mount with the 400 and 500 rack packs, so those are the sensible capacity upgrades.
Confirm the mount and the Bosch eBike System 2 oval charge port on your own frame, because packs that look identical across generations do not always interchange.
Sources: Bosch eBike Systems, PowerPack rack batteries · Propel Electric Bikes, Bosch PowerPack battery · Urban Arrow Service Center, Differences between Bosch eBike System 2 (BES2) and Smart System (BES3) · Propel Electric Bikes, Bosch Standard Charger 4A eBike System 2