Preventing GA batteries from dying, when you can't keep them on a plug-in maintenance charger, is no longer a problem. The BatteryMINDer® Aviation-Specific Solar Controller-Chargers deliver a safe maintenance charge to sealed or wet (filler cap) 12-Volt batteries. The units can be left connected to a battery without fear of overcharge. These solar versions of the highly recommended Aviation-Specific BatteryMINDers* deliver the same charge and maintenance outputs as the plug-in except at lower current. With its “at-the-battery” temperature sensor, it is guaranteed never to over-charge aviation specific 12-V batteries such as those made by Concorde and Gill. By providing each of these BatteryMINDer units with an “At-the-Battery” temperature compensating sensor, batteries can be safely charged and maintained for extended periods in temperature extremes from 32°F to 125°F. Without this type temperature sensing, batteries will be under-charged in colder temperatures (<70°F to 32°F) and over-charged in high temperatures (>80°F to 125°F). All models include full-time pulsed de-sulfation circuitry designed to safely dissolve sulfation build-up on the battery’s storage plates, restoring lost cranking power and extending life. Our de-sulfation method is fully automatic, does not use potentially damaging high voltage and is exclusively protected by two U.S. patents. These units were designed in close consultation with the major U.S. manufacturers of FAA Certified Aviation Specific batteries, both sealed AGM and flooded (wet cell) types.