New - Update stopped working correctly. Turns on and off repeatedly and blows battery fuses and maybe damaging inverter. ..... Original - This product has done exactly what I wanted I have tested it and although programmable I would recommend keeping it at the factory settings 2.1 V off and then 2.5 bolts back on. Customer service seems to be great sent an email on how to program the device and they got back to me within a day or so with the instructions and their recommendations.Customer service seems to be great sent an email on how to program the device and they got back to me within a day or so with the instructions and their recommendations User's recommendation: They are one of the few to have a very good battery protect device that is simple to use. They are one of the few to have a very good battery protect device that is simple to useOthers like Victron are much more complicated to use and may not protect what you think it is protecting. Others like Victron are much more complicated to use and may not protect what you think it is protecting.