MIDNIGHT MP PT CHARGE CONTROLLERS The most versatile and feature rich charge controller on the market is now also the largest Class 1 Div 2 certified MP PT Charge Controller! Midnight Solar has done it again with yet another industry first! Our popular medium sized charge controller, The KID, has its Class 1 Div 2 certification. This means that the C1D2 KID has been designed to safely operate in environments where flammable gases or vapors exist and have the potential to rise to ignitable concentrations.