Power budgeting

In low-power situations, the data logger can operate for several months on non-rechargeable batteries. Power systems for longer-term remote applications typically consist of a charging source, a charge controller, and a rechargeable battery. When ac line power is available, a VAC Volts alternating current.-to-VDC Volts direct current. wall adapter, the onboard charging regulator, and a rechargeable battery can be used to construct an uninterruptible power supply (UPS).

When designing a power supply, consider worst-case power requirements and environmental extremes. For example, the power requirement of a weather station may be substantially higher during extreme cold, while at the same time, the extreme cold constricts the power available from the power supply. System operating time for batteries can be estimated by dividing the battery capacity (ampere hours) by the average system current drain (amperes).

For more information see:

• Power Supplies Application Note 
• Battery Care Blog 
• Troubleshooting Your Solar Panel blog 
• Power Budget Spreadsheet
• Power Budgeting Video 

See also:

• Power input
• Power output
• Power requirements
• Power output specifications