how long does backup battery last

John Kelly of

How long does 7amp hour backup battery last if alarm is armed but doesn't activate?
How long does 3 amp hour backup battery last?

mickjohnlong

All depends on the consumption of the panel and what it's powering

John Kelly of

Hi Mick its powering a fanbelt for a nuclear reactor

DublinDilbert

A Siemens spc with pir, Ethernet, keypad and no bell box takes 0.25amps. So a 7a/hr battery would last 7/0.25 hrs or roughly 24 hours. In practice you might not get as long from it, also depends on how much extra the bell box takes.

fred funk }{

John Kelly of wrote: »

Hi Mick its powering a fanbelt for a nuclear reactor

No need to be smart. What he said was spot on. Do you think all systems consume the same amount of power?. Some panels have four keypads, multiple smoked detectors, beams and so on.

John Kelly of

DublinDilbert wrote: »

A Siemens spc with pir, Ethernet, keypad and no bell box takes 0.25amps. So a 7a/hr battery would last 7/0.25 hrs or roughly 24 hours. In practice you might not get as long from it, also depends on how much extra the bell box takes.

thanks

mickjohnlong

John Kelly of wrote:

Hi Mick its powering a fanbelt for a nuclear reactor

No need for the smart reply. You asked a question with no details and you got an answer to suit.