- I have a 100/15 Connect mppt. I connect to the app fine and it pulls through the stats, but later in the evening when the solar goes it disappears from the device list. I'm on the latest firmware and I have my caravan battery connected correctly, and I've checked the charge with a volt meter, and the solar looks ok. I removed one of the solar leads and the Bluetooth kicks in and it then appears in my list with all device settings. Help, as I don't want to be disconnecting it daily just to be able to access it.