We have a double-garage up and over door which we had converted to a power system about 9 years ago, touch wood, it works well.
This is powered by a mains unit bolted to the roof joists which pulls the door open by a roller chain; there is a pocket sized remote control which is labelled 'Hormann' but I don't know the exact model spec of the installation.
I can't imagine an installation powered solely by a battery would be practicable, the battery would need recharging fairly often.
Edited by galileo on 02/04/2013 at 23:22
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