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. Author manuscript; available in PMC: 2017 Aug 8.
Published in final edited form as: Vaccine. 2017 Apr 19;35(17):2224–2228. doi: 10.1016/j.vaccine.2016.11.103

Fig. 1.

Fig. 1

Conditions under which solar powered refrigerators can provide savings over electric refrigerators at the district level. The maximum annual cost for each district-level solar device (including amortization and maintenance) that can provide savings over electric mains-powered refrigerators in total cost per dose administered is shown when electrical outages of varying frequency and duration occur at all district level locations. Results assume the electric refrigerator holdover time exceeds the duration of the outage.