Solar Wax Melter

Free Energy, Clean Wax

A solar wax melter harnesses the same greenhouse effect that heats a parked car on a sunny day. A box (wood, styrofoam cooler, or even a discarded cooler) is painted black inside and covered with a glass or clear polycarbonate lid. Old comb, cappings, and burr comb are placed inside on a screen or slotted tray. The sun heats the interior to 160 to 200 degrees Fahrenheit, well above beeswax's melting point of 145 degrees F. The melted wax drips through the screen, leaving behind cocoon silk, pollen, propolis, and other debris. Clean wax collects in a container below.

Building One

The simplest version: a styrofoam cooler painted black inside, with a piece of window glass placed on top as a lid. Place it in full sun, tilted slightly so the melted wax flows downhill to a collection point. Total cost: under if you already have scrap glass. A more permanent version uses a plywood box (2x3 feet, 6 to 8 inches deep) with a hinged glass lid, interior painted flat black, and a stainless steel mesh screen set at an angle inside over a collection pan.

Best Practices

Place in full sun oriented toward the south (in the Northern Hemisphere). Tilt the box 10 to 20 degrees so wax flows to the low end. Use stainless steel or aluminum containers (wax reacts with iron and galvanized metals). Do not overload; a single layer of comb melts faster and cleaner than a thick pile. Remove rendered debris regularly. In Florida's intense sun, a well-built solar wax melter operates effectively from March through October, processing all wax from a small to medium apiary with zero energy cost.