- #1
dontosaw
- 21
- 1
Have an APC Back-UPS XS 1500, Model BX1500LCD (same as BR1500LCD), computer battery backup unit. It came equipped with two 12V, 9AH batteries wired in series. After 2 years and a power outage resulting in the batteries being almost completely discharged (control software not running), they are at the end of their life as evidenced by drastically reduced run time.
Rather than having to replace the batteries for $50-$80 every 2-3 years for 20-30 minutes of run time with my system, I would like to use 2 flooded, size 24M, 12V, 80AH Deep Cycle Marine/RV batteries. I haven't done the math, but I'm guesstimating that these batteries would provide 2.5-4 hours of run time for my system. If I were to do this, I would do it right, utilizing battery boxes, good connectors and wiring.
I have 3 questions:
The UPS is a high-end consumer unit, so I'm hopeful that it is fairly well made and heavy duty enough to be able to handle the assignment.
Here are the specifications for the UPS:
Model: BR1500LCD
Output Power Capacity: 865 Watts / 1500 VA
Max Configurable Power: 865 Watts / 1500 VA
Nominal Output Voltage: 120V
Output Frequency (sync to mains): 60 Hz
Crest Factor: 3 : 1
Waveform Type: Stepped approximation to a sinewave
Output Connections: (2) NEMA 5-15R (Surge Protection), (6) NEMA 5-15R (Battery Backup)
Nominal Input Voltage: 120V
Input Frequency: 60 Hz +/- 3 Hz
Input Connections: NEMA 5-15P
Cord Length: 6 feet (1.83 meters)
Input voltage range for main operations: 88 - 139V
Maximum Input Current: 12A
Input Breaker Capacity: 15A
Typical Recharge Time: 16 Hours
Surge energy rating: 340 Joules
Filtering: Full time multi-pole noise filtering : 5% IEEE surge let-through : zero clamping response time : meets UL 1449
Data Line Protection: RJ-45 Modem/Fax/DSL/10-100 Base-T protection,Co-axial Video / Cable protection
Regulatory Approvals: FCC Part 15 Class B,FCC Part 68,NOM,TUV
Batteries I'm thinking of using (2 wired in series):
DieHard Marine Deep Cycle/RV Battery, Group Size 24M
Sears Item# 02827494000 | Model# 27494
Voltage: 12.0
Cold Cranking Amps (CCA at 0 deg.F): 500
Reserve Capacity (RC): 135 min.
Amp Hours at 20 Hour Rate: 80
I don't think H2 gas would be a problem as batteries and computer would be in fairly large room with enough air changes to dissipate and I don't smoke and would keep ignition sources away.
I know that doing this cannot be recommended and accept all risk and liability. I just want to know whether it would work from a theoretical perspective.
Thanks,
Don
Rather than having to replace the batteries for $50-$80 every 2-3 years for 20-30 minutes of run time with my system, I would like to use 2 flooded, size 24M, 12V, 80AH Deep Cycle Marine/RV batteries. I haven't done the math, but I'm guesstimating that these batteries would provide 2.5-4 hours of run time for my system. If I were to do this, I would do it right, utilizing battery boxes, good connectors and wiring.
I have 3 questions:
- Will the UPS be able to keep the marine batteries charged?
- After a deep discharge, will the UPS be able to recharge the batteries in a reasonable amount of time (36 hours max)?
- During a long power outage, would my UPS be able to supply power to my system for several hours without overheating? If not, can this be mitigated by modification (ventilation, heat-sink)?
The UPS is a high-end consumer unit, so I'm hopeful that it is fairly well made and heavy duty enough to be able to handle the assignment.
Here are the specifications for the UPS:
Model: BR1500LCD
Output Power Capacity: 865 Watts / 1500 VA
Max Configurable Power: 865 Watts / 1500 VA
Nominal Output Voltage: 120V
Output Frequency (sync to mains): 60 Hz
Crest Factor: 3 : 1
Waveform Type: Stepped approximation to a sinewave
Output Connections: (2) NEMA 5-15R (Surge Protection), (6) NEMA 5-15R (Battery Backup)
Nominal Input Voltage: 120V
Input Frequency: 60 Hz +/- 3 Hz
Input Connections: NEMA 5-15P
Cord Length: 6 feet (1.83 meters)
Input voltage range for main operations: 88 - 139V
Maximum Input Current: 12A
Input Breaker Capacity: 15A
Typical Recharge Time: 16 Hours
Surge energy rating: 340 Joules
Filtering: Full time multi-pole noise filtering : 5% IEEE surge let-through : zero clamping response time : meets UL 1449
Data Line Protection: RJ-45 Modem/Fax/DSL/10-100 Base-T protection,Co-axial Video / Cable protection
Regulatory Approvals: FCC Part 15 Class B,FCC Part 68,NOM,TUV
Batteries I'm thinking of using (2 wired in series):
DieHard Marine Deep Cycle/RV Battery, Group Size 24M
Sears Item# 02827494000 | Model# 27494
Voltage: 12.0
Cold Cranking Amps (CCA at 0 deg.F): 500
Reserve Capacity (RC): 135 min.
Amp Hours at 20 Hour Rate: 80
I don't think H2 gas would be a problem as batteries and computer would be in fairly large room with enough air changes to dissipate and I don't smoke and would keep ignition sources away.
I know that doing this cannot be recommended and accept all risk and liability. I just want to know whether it would work from a theoretical perspective.
Thanks,
Don