...
ease of use
wind tunnel orientation (module orientation within the pack)
safety
sun power, charge/discharge cycles
compatibility (module dims?)space for wiring (thermistors, senses, etc)
compatibility for different modules
...
ease of use
wind tunnel orientation (module orientation within the pack)
safety
sun power, charge/discharge cycles
compatibility (module dims?)space for wiring (thermistors, senses, etc)
compatibility for different modules