GPEKS Constructions INC is the exclusive SOLARWALL distributor for Africa. This technology is the most effictive way to dry crops for large manufacturing facilities which currently burn oil or wood. GPEKS Constructions INC. Is the exclusive distributor for Conserval Engineering SOLARWALL products in Africa.SOLARWALL roof integrated panels are being used to dry numerous crops around the world. Commercial drying operations can displace fossil fuels used in most driers by adding SOLARWALL panels as a preheater or primary heater. Solar heat for drying air will not burn or harm many delicate foods, which may happen with steam heated or fossil-fuel heated air.