Last updated: 7 March 2018      

Solar box cookers and solar panel cookers normally do not need to be turned to follow the sun unless you are cooking beans or an especially large amount of food, or if you are cooking on a day where sunlight is not optimal. They may need to be turned once over a three- or four-hour cooking period. However, parabolic solar cookers require reorientation with the sun much more often. If tracking the sun is necessary, some of the ideas below will serve this purpose.

When designing tracking systems, it can useful to determine the annual movement of the sun for various locations. Besides annual range, this useful tool also gives real-time sun information for a specific location.

Solar Angle Calculator, Solar Electricity Handbook 2016, 5-5-16

Solar Angle Calculator sample image - Solar Electricity Handbook 2016

The 2016 Edition of the Solar Electricity Handbook also offers a convenient visual tool to calculate the sun's position in virtually all cities around the globe. It can be found at: Solar Angle Calculator


Instituto de Energías Renovables prototype box cooker, 9-13-17

Instituto de Energías Renovables prototype solar box cooker - Photo credit: Instituto de Energías Renovables

Mechanical tracking systems

Scheffler tracking mechanicals, 2-9-13

The Scheffler clockwork tracking system mechanicals

Simply Solar provides explanation of their various tracking systems at Scheffler tracking systems. The mechanical system incorporates a clockwork mechanism, and often uses recycled bicycle parts. It is run by a weight and controlled by a pendulum. Resetting the reflector back from the evening position to the morning position is done by hand. They also offer photovoltaic options as well.

Programmable tracking systems

Still in its infancy, programmable tracking systems are being developed with software to not only rotate the reflector to maintain maximum exposure to the sun, but also to control cooking time and desired temperatures. One example of an auto tracking and monitoring system is the SolarCue system. Another is the Raspberry Pi: Solrmatic, but there are a range of such programmable sun trackers.[1]

Photovoltaic tracking systems

Solar Tracker circuit schematic

A photovoltaic solar tracking circuit schematic provided by Marian Popescu

A clever system has been developed by several designers, which uses two photovoltaic panels configured to maintain an even balance of power to a small electrical turntable motor. Typically, the required photovoltaic panels are fairly small and are placed side by side, but at slightly different angles to face the sun. As the sun moves across the sky, one panel will begin to receive less direct sunlight.

The resulting electrical imbalance causes the dominant panel to engage the motor. The turntable will rotate until both photovoltaic panels face the sun equally and the motor disengages. The simple system can be fairly lightweight for rotating a box or panel cooker. However, a larger parabolic solar cooker, which will benefit the most from a good tracking system, will require a stronger motor and larger panels to rotate the cooker.

More information about the system can be found at DIY solar tracking system

Tracking for the HotPot solar cooker

HotPot tracker

Most are familiar with the HotPot, a fine quality cooker. It does an excellent job of representing a solar cooker as a desirable appliance. However, the original design was created for use in tropical or semi-tropical areas bounded by the Tropic of Cancer (23.5° N) and the Tropic of Capricorn (23.5° S). The reflectors have been oriented for a more overhead sun position, which limits the cooking time in temperate locations to a 2- to 4-hour window. The following article talks more about this issue. The author has been working on a tilting base mechanism to allow the reflectors to pick up early and late day sun. However, it may be a better idea to supplement the HotPot reflectors with a windshield shade tipped forward and wrapped behind the cooker to catch the early and late day sun, as the pot and glass enclosure are really not suited for non-level conditions. Details on this tracking design here.

Main article: HotPot


Main article: Solrmatic
Rasberry Pi-Solrmatic, 4-30-14

The Raspberry Pi: Solrmatic

The Solrmatic is a programmable turntable system intended to provide more control over when and how often a solar cooker needs to be reoriented with the sun. It can work with many existing manufactured or homemade solar box cookers and solar panel cookers when they are placed on the turntable.

The Solrmatic features thermostats, time delay, timed cooking, and web monitoring, allowing you to cook almost everything you normally cook in a traditional oven. The Solrmatic has cooked leg of lamb, brisket, veggies, bread, cookies, bacon, and even dehydrated apples.

Articles in the media


Audio and video

  • July 2015:
Scheffler mirror demonstrations

Scheffler mirror demonstrations.wmv

Wolfgang Scheffler explains the workings of two of his automatic tracking parabolic cooking systems and the design of his solar food dryer.

  • May 2013:
Solar oven tracker wiring

Solar oven tracker wiring

A very clear short video of a simple photovoltaic tracking mechanism.

  • February 2013:
CATASSOL automatizado 1

CATASSOL automatizado 1

Pleno Sol provides a short demonstration of the photovoltaic tracking system they have developed.

  • March 2011:
Solar Oven with Tracker

Solar Oven with Tracker .mpg

Box cooker rotated by PV panels sending power to 12-volt motor. As one PV panel begins to receive less light, it sends less power to the servo, which operates the motor until both panels are sending a balanced power stream.

  • December 2010:
Smart Solar Oven Platform Benchtop Test

Smart Solar Oven Platform Benchtop Test.wmv

  • December 2010:
Cooking a Yam 12-30-10

Cooking a Yam 12-30-10.wmv

Programmable system tracks the sun and turns the reflector away when cooking is completed.

  • October 2010:


  • March 2010:
Revolutionary Solar! Stirling engine mount + Liquid piston tracker

Revolutionary Solar! Stirling engine mount + Liquid piston tracker

Tracking Solar Accumulating Barbecue - Brian White

  • May 2008:
Clock based dripper tracker demo

Clock based dripper tracker demo.

Clock based dripper tracker demo

  • April 2008:
Dripper tracker for parabolic solar accumulator!

Dripper tracker for parabolic solar accumulator!

Dripper tracker for parabolic solar accumulator

  • December 2007:
ME102 UC Berkeley Solar Tracker Project

ME102 UC Berkeley Solar Tracker Project

UC Berkeley student tracking system demonstration

Low-tech solar tracking

See Ideas for low-tech solar tracking.

See also

External links


  1. Prinsloo, Gerro; Dobson Robert. (2015). Solar Tracking: High precision solar position algorithms, programs, software and source-code for computing the solar vector, solar coordinates & sun angles in Microprocessor, PLC, Arduino, PIC and PC-based sun tracking devices or dynamic sun following hardware (3rd ed.) South Africa. ISBN 978-0-620-61576-1. Retrieved 14 March 2015.