Delmar
Solar Addict
I am installing a small UPS to run my Moms TV and satellite dish during short-term grid down. Measured around a 100W draw. The backup system needs to be granny-proof autonomous so purchased a APS sine wave BR1000MS. Cost was $160 including tax & shipping.
The UPS is supplied with an internal 24V AGM Battery rated 130WH (5.4AH x 2). Per the specs a 100W draw should run for 43 minutes. Plugged in the UPS for around 4-hours and measured the battery pack at 27.6V, figured that was close enough to fully charged.
For the first test I unplugged my full-size fridge to ensure a long runtime. It draws a similar 100W so should be a fair comparison to grandmas TV. Connected the fridge to the UPS while on wall power for a few seconds, then unplugged the UPS from the wall. The fridge continued to run with no problem.
Closely monitored the fridge and UPS for 33 minutes until the capacity indicator was under 3 minutes remaining. I could sense a slight warmth from the UPS while running at minimal 17% capacity, and only the smell of new electronics. Never did I feel or smell any electronics cooking.
After turning off the UPS for a minute the battery measured 23.4V. Considering that was not true resting voltage I am not concerned. Did not test the surge capacity while starting the fridge from the small batteries. I will replace the internal batteries with a pair of external 35AH Harbor Freight AGM in series, cost will be $117 for the pair after my 20% coupons. Capacity @ 24V = 840WH. With a 100W draw I estimate should run for 4.6 hours. Will add a second pair if grandma complains about the runtime.
Pictured for size comparison is one of the two Harbor Freight batteries next to the APC 24V pair. I will return to Harbor Freight when they restock another battery. Did not want to steal the one running my Belkin UPS.
The UPS is supplied with an internal 24V AGM Battery rated 130WH (5.4AH x 2). Per the specs a 100W draw should run for 43 minutes. Plugged in the UPS for around 4-hours and measured the battery pack at 27.6V, figured that was close enough to fully charged.
For the first test I unplugged my full-size fridge to ensure a long runtime. It draws a similar 100W so should be a fair comparison to grandmas TV. Connected the fridge to the UPS while on wall power for a few seconds, then unplugged the UPS from the wall. The fridge continued to run with no problem.
Closely monitored the fridge and UPS for 33 minutes until the capacity indicator was under 3 minutes remaining. I could sense a slight warmth from the UPS while running at minimal 17% capacity, and only the smell of new electronics. Never did I feel or smell any electronics cooking.
After turning off the UPS for a minute the battery measured 23.4V. Considering that was not true resting voltage I am not concerned. Did not test the surge capacity while starting the fridge from the small batteries. I will replace the internal batteries with a pair of external 35AH Harbor Freight AGM in series, cost will be $117 for the pair after my 20% coupons. Capacity @ 24V = 840WH. With a 100W draw I estimate should run for 4.6 hours. Will add a second pair if grandma complains about the runtime.
Pictured for size comparison is one of the two Harbor Freight batteries next to the APC 24V pair. I will return to Harbor Freight when they restock another battery. Did not want to steal the one running my Belkin UPS.
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