PATH
Safety monitoring
The solar panels that power direct-drive refrigerators often gather more energy than needed to cool vaccines. Energy harvest control devices (EHCs) provide a way to use that excess electricity for other purposes at health centers.EHCs are designed to protect the vaccines first. They won’t allow users to draw on power the refrigerator needs, and they’ve been tested and approved by the World Health Organization (WHO) as peripheral devices for vaccine cold chain equipment. Plus, direct-drive refrigerators retain their own thermal backup for cooling the vaccines when the sun isn’t shining.