If fuel wood is stored in the form of chips, high moisture content entails degradation, health and self-ignition risks. Thus efficient methods for drying wood chips are vital. The present study evaluated the productivity of a solar drying system for wood chips developed by CONA Entwicklungs- und Handelsgesellschafts mbH. This system consists of solar-air collector panels, mounted on a roof, where air is heated up and then blown through wet wood chips, which are placed on sloping, perforated gratings inside the drying box. Thirty drying plants, 12 in Bavaria and 18 in Upper Austria, were part of the survey. Installed panel ranged from 24 to 348 m, drying box volume from 40 to 200 m loose and the yearly drying capacity from 300 to 5.000 m loose. Dry chips are mainly produced for owners consumption and sale. In average, 17 m loose can be dried per m of installed solar panel and year, resulting in an average final moisture content of 15 %. During the season of spring through autumn drying one lot of chips takes 1.5 to 3 weeks. It is possible to dry 21 lots per year. Manipulation takes about 2 hours per lot, resulting in costs of 0.50-2.00 per loose cubic meter. For ventilation, in average 3.9 kWh electric power are required per m loose, which is equivalent to costs of 1.00 per m loose. From one m loose of dry chips in average 0.7 MWh of heat can be produced, while 1.6 m loose of dry chips are consumed per produced MWh. In conclusion, this drying method proved to be very eco-efficient. Dry chips entail energy and fuel savings, improved storability, reduced degradation and fungal contamination and reduce the self-ignition risk to a minimum.