Motorized window shades are widely used with embedded lithium-ion batteries that are
charged by solar energy via photovoltaic (PV) arrays. The complex models of sun irradiance
and glass light absorption are developed to forecast the energy balance for long term
operation of those off-grid shades. However, the batteries are often depleted due to partial
shading and low illumination. The paper presents a new method of monitoring the energy
balance of those motorized shades via IoT networks. The battery voltage variations over time …

Many motorized window shades have embedded lithium-ion batteries that are charged by
solar energy via photovoltaic (PV) arrays. The complex models of sun irradiance and energy
loss through glasses are used to forecast the energy balance for off-grid long term operation.
However, the batteries are often depleted due to partial shading and climate change. The
paper presents a new method of monitoring the energy balance of those motorized shades
via global networks. The battery voltage variations over time are periodically measured to …