65 Watt Single OR Dual Solar Panel Ground Mount Setup. Single panel is pictured below; a second panel can be mounted below the first. There is (a limited) angle adjustment range.

EPIC's Polar Group specifically designed a power management module to control the charging and manage the power system in extreme-cold temperature environments. There are two main parts in the power box:  The solar charge controller and the power switcher.  The solar charge controller, as the name implies, takes care of the proper and efficient charging of the batteries when solar energy is available.  The power switcher takes care of switching from the rechargeable batteries to the primary batteries when the rechargeable batteries' voltage dips below a threshold, and switches from the primary batteries to the rechargeable batteries when the rechargeable batteries' voltage gets high enough from solar charging.  Both the charge controller and the power switcher were tested successfully for operation at -55C after having been subjected to -70C for several hours.

The Polar Program of EarthScope/EPIC is dedicated to supporting with seismological research in the Arctic and Antarctic.  As opposed to traditional seismic stations installations around the world, instrumenting the Arctic or Antarctic require special consideration due to the extreme nature of the climatic conditions, temperature being the primary challenge.

Sensor: sensitivity and passband (velocity transducer) or scaling (accelerometer)

Datalogger: Analog-to-Digital (A/D) conversion factor (aka bit weight) and Gain 

Example: Counts to Ground Velocity Conversion within the Passband