Pure DC 12V - 24V solar chest refrigerator / freezer with accurate temperature control, fast cooling, and wide temperature setting range. Supports an input DC voltage of 11 - 28 volts and uses no more than 4 amps when running, the unit cools quickly and dissipates heat efficiently using its large radiator. Keep your precious goods cold no matter what the grid throws at you. To make it easy, we offer four options when buying this fridge: DC Fridge Only - use with your existing 12 to 24 volt power suppliers DC Fridge with suggested large capacity battery - fridge runs directly off the battery for up to a week on a full charge Complete Solar Fridge System - Everything you need to keep it running in perpetuity. Fridge, battery, four 100 watt top tier lightweight Sunpower brand solar panels and a top tier Victron brand charge controller to keep your fridge running year-round not connected to anything. Includes 10 foot cable runs and basic breakers, system comes plug-and-play, pre-configured, ready to be put to work same day you receive it. Complete Grid-Down Backup System - Fridge, battery, and an automatic 10 amp charger to keep your battery charged. During a power outage, the fridge begins to use battery power which is maintained at full charge. When power is restored, the battery is refilled automatically by the charger. No switchovers have to occur as the entire system is DC. Perfect for regions with frequent brown-outs for those who cannot or do not want to install solar panels. Use the least amount of power with no conversions for absolutely best efficiency when every watt is at a premium. We supply the highest quality products for the simplest, most robust, professional, reliable operation. For this reason, we include a Victron Charge controller and four lightweight, premium Sunpower 100 Watt solar panels all pre-configured and ready to use out of the box. Real, powerful, heavy duty refrigeration for your most demanding applications, simplified.