Vaccine Refrigerator & Icepack Freezer The new TCW 40 SDD is a combination of a solar direct drive vaccine refrigerator and ice pack freezer, specially designed for small to medium size health centers. Net vaccine storage capacity : 36 L Ice pack storage capacity: 8 x 0.6 L Autonomy : 81 h 41 min. at +43°C ambient temperature Minimum solar radiation for continuous running 250 W/m²/PQS ref. 3. 5 KWh / 24 h / m² Hold over time: 93 h 24 min. at +43°C ambient temperature PQS-Code: E003/042