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Off-Grid Solar & Battery Calculator

Size the solar panel, battery and charge controller for a camera or 4G router that runs off-grid.

Off-Grid Solar & Battery Calculator

Size the solar panel, battery and charge controller for a camera or 4G router that runs off-grid.

Average load (W)

The camera plus any 4G router, from the datasheets.

Hours running per day

System voltage

Days with no sun

How long the battery must keep the camera running through cloudy weather.

Battery type

Peak sun hours in the worst month

The Bureau of Meteorology's daily solar exposure for the site, in MJ/m², divided by 3.6.

System losses (%)

Dust, heat, wiring and charging losses.

Results

Energy per day: 192 Wh

Battery capacity: 720 Wh (60 Ah at 12 V)

Solar panel: at least 102 W

Charge controller: at least 10.7 A

A starting point for a remote camera site, not a full stand-alone power system design. Size for the worst month: winter sun in southern Australia is a fraction of summer.

Building a bigger job?Add these figures to a project, then add results from any of the other calculators. The project becomes one report you can save as a PDF and import again later to make changes.

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How it works

Daily energy is the load in watts x the hours it runs. The battery must cover that for the days with no sun, divided by the share of its capacity you can use (80% for lithium, 50% for AGM), and amp-hours are watt-hours divided by the system voltage. The panel must replace a day's energy in the worst month's peak sun hours after losses. The charge controller is the panel's current at the system voltage plus 25%.

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Teracom Solutions designs, supplies, installs and monitors CCTV, alarms, access control, intercoms, networks and AV for businesses. Send us your Off-Grid Solar & Battery Calculator results and we will quote the job, free.

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