Another approach if you can’t get out there fast enough with a portable generator would be strategic load shedding. Often we see that 90% of the customers are also without power so we’re getting no benefit by keeping the APs running, but maybe we’d like to keep the backhauls up so other sites aren’t affected.
My observation is once you get to the LVD trip point, the rate at which the battery voltage is dropping has accelerated and there’s not much runtime left anyway. Also I worry about equipment getting into a locked up state if the DC voltage got too low but didn’t cleanly go off and back on. Normally we try to have enough battery runtime that we can get there with a generator. There are extreme circumstances though, like widespread power outages, or we’ve had ice storms that took down power wires but also made the roads impassable for 24 hours. I do sometimes wish battery management systems with built in LVDs would let us adjust the trip point a little lower, like maybe 19 or 20 volts instead of 21. From: AF <af-boun...@af.afmug.com> On Behalf Of Chuck McCown Sent: Thursday, August 8, 2019 8:57 AM To: AnimalFarm Microwave Users Group <af@af.afmug.com> Subject: Re: [AFMUG] LVD Philosophical question. With infrequent outages I would prefer to keep people on line for as long as possible, So no lvd or set it below where the equipment ceases to function. If you have protracted outages get a generator. I don’t see a use for lvd equipment unless it is in a remote area and powering non critical gear. Sent from my iPhone On Aug 8, 2019, at 1:12 AM, can...@believewireless.net <mailto:can...@believewireless.net> <p...@believewireless.net <mailto:p...@believewireless.net> > wrote: At what point would you want to enable an LVD on a 12V and 24V system? -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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