We've been using these: http://www.poweringthenetwork.com/din-ups/
12V, 24V and 48V options. Alarms when on battery so Sitemonitor is notified and let's know know of bad battery/change battery as well. Pretty affordable too. On Wed, Mar 9, 2016 at 1:52 PM, Chuck McCown <[email protected]> wrote: > A pair of power supplies that are capable of pulling the load and charging > the battery. > > For example, if you needed 200 watts for your 24 volt loads, you need 8.3 > amps. Round that up to 10 amps. > Then you have to decide how long you want this thing to last without > commercial power. I would think 24 hours is a minimum. So 10 amps x 24 > hours is 240 amp hours of battery. > It is always a safe figure to charge a battery at .1C or 10% of its > capacity or less. That would be 24 amps to charge the batts after a power > outage, plus 10 for load = 34 amps of power supply. You could get by with > 20 amps, just will take a bit longer to charge. > > Lots of 20 amp 28VDC power supplies out there. > Rule of thumb double your load power or more to size the charger. > > *From:* SmarterBroadband <[email protected]> > *Sent:* Wednesday, March 09, 2016 11:45 AM > *To:* [email protected] > *Subject:* [AFMUG] Small DC Site > > > What are people using to power small DC sites. Option 1 up to 150 - 200 > Watts, option 2 up to 300 – 400 Watts. I’m looking for a DC UPS that can > charge attached batteries. Need to have 24 and 48 volt. >
