The new TCW 2000 SDD (Solar Direct Drive) consist basically of a TCW 2000 DC but it has had some major modifications on the electronic level as well as in the icelining. Vaccine storage capacity (l): 99 Ice pack storage capacity: 16 x 0.6 L Autonomy time (+2°C to +8°C): 85 h 24 min. Minimum solar radiation for continious running: 250 W/m²/PQS ref. 3. 5 KWh / 24 h / m² Cool down time: 12 h PQS-Code: E003/035