@lee‘s Homestead,
Depending on how big your solar array is, and how many sun days you get, your hubby may not be too far off his assessment.
Try this once: Run a laptop on batteries only. See how long the battery lasts. Then recharge it using the solar charger.
Here, we saw the first appreciable sunlight that could charge anything yesterday. Been a good 3 or 4 days before that.