German outlet Motor1.com Deutschland has published a ten-step guide for storing a motorhome or caravan over winter. The article lists measures to prevent frost damage, damp and battery drain. Recommendations include fully draining water tanks and lines, including the boiler, and leaving drain valves open during storage. AGM, gel and lithium batteries require different charge levels for winter storage. It also advises increasing tyre pressure by about 0.5 bar and leaving cupboard doors ajar to maintain air circulation.