Solar street light power calculator for Melbourne

Our calculator uses hourly typical meteorological year (TMY) data from NREL.

Data from TMY is for a 1 year period. The collection of this data is over many years.

About this calculator

This calculator is for solar street lights using a lithium battery. It is important to keep the charge of the battery high to extend the life of the battery.

  • Location: Melbourne, Vic (using solar data from  Tullamarine Melbourne, Australia)
  • Lithium LiFePO4 battery
  • Solar panel tilted 52° and facing North

Solar light specifications

  • 10w LED output 
  • 80w solar panel
  • 386wh lithium battery 

This calculator shows the performance of 

Other lights can be modeled as the calculator accepts different parameters.


  • If the lights turn on at sunset the system has an average of 68.19% battery remaining at dawn.
  • 43.30% is the minimum battery charge at dawn (2 May)
  • It is important to get a large sized solar panel to charge the battery quickly during winter in Melbourne

Weather predictions

  • Past weather performance is not an indicator of future weather patterns.
  • Yet, this is real historic weather data and, it is a good starting point.

This calculator is editable.

██ coloured cells are editable