Typically, external (ambient) temperature range is from -30° C to 55° C in all latitudes and longitudes. . at 77 °F (25 °C). See product warranty document f erator integration. Stack 3-6 modules in a single battery cabinet for 9-18 kWh at 77. . In outdoor environments, the solar heat input (Qsolar) must also be considered. The heat input resulting from solar radiation cannot be disregarded, as it may be a cause of the increase in. . Each cabinet holds 3 to 6 3. 0 kWh Usable Energy) PWRcell EX Battery Modules for 9kWh to 18kWh storage capacity. It lets you calculate either: The maximum power dissipation for a given surface temperature.