Currentlly looking into ideas for the redesign. Incorporating more native materials will bring down the expertise required for the assembly of the prefabricated parts and reduce the need for expensive machinery and consumables.
Having priced up the materials and bought-in parts for the initial design, which is based upon concept 1, I found that the price would be over £600 (approx. US $960). This is making use of virgin steel and brand new electronics such as the panels, batteries and charge controller.
Peak sun hours are the number of hours per day where solar irradiance, at ground level, averages 1 kW/m^2.
System Sizing Calculations
The first equation shows how to calculate the size of the solar panels in peak Watts (Wp). This is the maximum amount of power that will be created from the solar panels. W is the power rating of the stove, which is multiplied by the time of use (Hrs) to get a Watt hours figure. 3.5 is the peak sun hours figure obtained from NASA datasets, 1.2 is a constant that accounts for losses due to defects or incorrect alignment of the panels. V relates to the battery voltage.