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How long does Zummer-GSM work without the main power (on internal batteries)?

April 26, 2017batteries Internal main power zummer-gsm

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How long does Zummer-GSM work without the main power (on internal batteries)?

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8 hours approx., with all sensors connected. After 5 hours of continuous main power failure you receive an SMS-notification. We can supply batteries with more capacity or a UPS to make Zummer-GSM less dependent on the main power.