Sap Flow Meter Power Consumption and Auxiliary Power Calculator

This calculator will allow you to estimate the power required for a supplementary 12 volt battery supply system to supplement the internal battery of the SFM1 and SFM1x Sap Flow Meters.

Number of Devices:

Heat Pulse (J):
Interval (min):

Battery Capacity (Ahr) Select the battery capacity to give sufficient power for 3 days. This is the stage where the battery capacity has discharged to 50% State of Charge:

Equivalent Sunlight Hours (ESH):

Select ESH based on the average number of hours per day that unshaded sunlight will strike the panel.
Daily Consumption (Ahr @ 12V):
Daily Consumption (Whr @ 12V):

Recommended Solar Panels:

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