Power-Efficient Hybrid Energy Storage System for Seismic Nodes

Table 1

Summary of notations and definitions.

Notation	Definition
	Photocurrent generated from irradiance incident on the solar cell
	Diode current
	Current flowing through parallel resistance
	Load current
	Parasitic series resistance
	Parallel shunt resistance
	Open circuit voltage
	Short circuit current
	Saturation current of the diode
	Operating temperature
	Reference temperature
	Ambient irradiance
	Reference irradiance
	Charge of an electron
	Boltzmann’s constant
	Ideality constant of the diode
	Band gap energy of the semiconductor