The Marantec 104586 Battery Back Up is the OEM backup power module designed for select Marantec Synergy garage door openers. When utility power is lost, it supplies standby power so your Synergy operator can open and close the door, maintaining access to the garage during outages. This factory accessory is commonly used as a replacement part or an upgrade for homeowners who want reliable operation in emergencies. It is engineered for compatibility with Synergy 200- and 300-series models, including Synergy 260, 270, 280, 360, 370, and 380 residential openers.
Installation is straightforward: the module mounts to the opener housing and connects to the designated battery back-up port using the provided harness. Once connected, the opener maintains the charge and automatically switches to backup power when needed, typically without additional programming. For best results, allow an initial charge period before testing, follow the opener’s manual for step-by-step instructions, and test periodically. This accessory is intended for indoor residential garage applications and is not interchangeable with non-Synergy or non-Marantec operators.