This is my second device within a year. The first time they sent me a new device. Now, a little less than a year later, the device is not working again. When 14V is applied, the low voltage indicators light up and the device turns off. When the power is turned back on, the device will work for a few minutes and turn off again with a red light when the battery voltage is low. Not surprisingly, it was reduced by $200. This device may be suitable for short term use but is not suitable for RV or boat use.