[prydey]

Battery is 100Ah. Panel is advertised as 200w, but probably closer to 160, according to people much smarter than me concerning those things.

It kept up with demand on the weekend. The only means of battery monitoring I have is a volt meter that plugs in to a 12v socket. These are only really accurate if your battery has been at rest for a few hours apparently, but whilst the panel is charging, that will read 14v. The regulator (I only have cheap pwm, not mppt) switches to float at 13.7, so most of the time the battery was full.
Panel doesn't need sun. They just need light, so even on a cloudy day they will still produce some power. Fixed panels have that downside (being fixed) but it's much less hassle for me and one less thing to carry and set up...