Traffic Calming Sign Battery Life Calculator
This simple on-line calculator will help you estimate the expected battery life you'll typically get from your sign.
As inputs you'll need:
- The power usage of your display panels at full brightness (max sunlight) (in watts or Amps)
- The power usage of your display panels at minimal brightness (nighttime) (in watts or Amps)
- The power usage of your display panels (or controller) with LED dark (in watts or Amps)
- The power usage of the radar you plan to use (we'll fill in the values for Houston Radar devices based on your selection)
- The average traffic density on the road during the day and at night (vehicles/hour)
- The size of the battery you plan to use in amp hours. This is usually in the range of 25 to 40Ah for pole mounted signs or portable signs and typically 200 to 400Ah for trailers
- The average speed of the traffic on the road
- Finally if you would like to compare the battery run time with another radar, please enter the value. We've also put in a default to guide you.
- The power usage of a competing radar in watts or Amps (accept default to compare with a typical competing radar in the market). Note that panel power usage depends on how long each vehicle is displayed, which in turns depends on radar range and vehicle speed. We assume that sensitivity/range has been adjusted down to 350' for short range radars, 800' for medium range radars and 1200' for long range radars. To be fair we assume that "other" radar has beed adjusted to the same range. That is why you see that "other" radar battery life changes when you change Houston Radar model.