Headlights problems of the 2011 Dodge Grand Caravan

Started van one morning and left running to warm up, came back outside and it had died. The wipers were mid-windshield. Turned the key and dash lights illuminated. The van would not start but made a ticking noise upon turning the key. 2 days later I stopped to get fuel in the van. It hesitated to start, but did start. Headlights were very dim and faded in and out. Put a code reader on the computer and it threw a low battery voltage code. Put a voltmeter on the battery and it read about 10 volts while the van was not running. While the van was running the voltmeter read about 14 volts so it is charging. Have had several instances where power windows would not work or power doors would not open and had to be manually opened.