The decision of a National Immunization Programme to use Solar Direct Driven (SDD) Refrigerators instead of Solar Panels to run refrigerators I think is like presenting challenges in the so called expected “better and sustainable solution” especially for the low resources countries. It is true that, SDD are compressor powered directly from the sunlight (they are really environmental friendly) and therefore does not need additional running costs for batteries which in other way these batteries are” less environmental friendly”. The other field tested facts is that, they are more efficient in maintain the temperature between +2 to + 8 degree Celsius than the absorption types where freezing can occur due to temperature excursion on the lower side especially in cold climate areas. This seem to be better solution, However the challenge remains that, they have no application for lighting and therefore the temperature cannot monitored/recorded in dark rooms and or at night.
Lighting is very important, this could be provided in using solar panel instead of SDD, one will benefit with improved curative (and delivery) services at night, I understand major problem is home deliveries and maternal deaths; Improved data transmission using phone for health initiative, I believe data transmission and quality remains to be major problem; improved human resources for health by ensuring lighting for health workers houses and even security in the health facility, I believe shortage of skilled staff and equity in distribution of few available health workers is also a problem. I therefore think, solar panels installation, is more supportive for health system rather than the SDD which are primary immunization delivery centered intervention, thinking as health system strengthening intervention. More challenge is the fact that, even some of SDD have been per-qualified and within short period removed from ore-qualification, thinking of no recovery of damage. When purchasing SDD one should consider, the vaccine volume, costs, climatic condition and autonomy/safety margin for ensure no temperature excursion. However, a major issue on the spare parts which may not be a problem on using panel is extremely important. My question still remains, is SDD solution or a challenge in solution for the low resources countries? No right no wrong answers, but we need to have better decision making for the limited resources.
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