not nearly as dark here today, in genesee county. i just got my 6 new panels (10 total) hooked up today, before the rain started. yesterday. w/ just 4 panels, 175w each, 2 panels in series, my controller (xantrex mppt) struggled to get enough juice to even stay on. today, it is generating enough volts so it doesn't keep cycling on and off.
the panels are 24v, so 2 in series is 48v. i just got a new 48v inverter, so i converted my bank from 24v to 48v. i wanted to go 3 panels in series, but in very cold weather, somewhere around 0F, they could exceed the 150v max input of the controller.
like you, i am now waiting for some good sun to test my new panels. i hit 350w at 8am when the sun was out, so that was pretty good, as that is half of what my old array could put out at high noon.