So far I never seen reliable UPS, where most of models I seen, has been proprietary, based on brand trust and produced for own use.. By shearing this research job with you, i want to promote open hardware telecom UPS, intended for roof top units, and rural back haul or macro cell installations. Fully automatic regulation gives redundant 24V power 24h daily, and like a space station can function even without AC power connection. 8-position encoder on front serves as a turn OFF switch for priority based load shedding. See larger image in attachments. Dear Manufacturer, if you need the bright idea here it is.. I'll be glad to buy it from you, and I guess, not be the only one.