Over a three day period, I generated and consumed over 750 watt hours of power using the solar panel on my truck. It’s been a hot and buggy weekend so many nights I was up late burning the lights into the wee hours of the day and running the fan to keep cool. But during that 72 hour period at camp I was able to keep my truck turned off and everything fully charged without problems entirely on solar. While my system is too small for powering a house or cabin it works great for camp power, and had no problems when it was relatively cloudy on Saturday.