Modern vehicles have a small but constant power draw from the battery. They are full of electrical systems that are constantly running, even when the ignition is not on.
Alarms, immobilizers, and lock monitoring are examples of background systems that can cause the battery to discharge even when the vehicle is not in use.
OSPOBD is compatible with OSRAM OSP500, OSP1000, and OSP2000 Solar Battery Maintainer devices, allowing connection through the vehicle's OBDII port for a more efficient connection than through the 12V socket.
It provides a constant connection between the solar charger and the battery for long-term battery maintenance.