I use a few spare panels on my decking area in winter which are connected to a couple of Tigo's (voltage optimisers) to increase the yield in one of my strings (far left in the picture). They are pointed easterly as that the only direction which still gets some sun in the winter.
In early spring I normally remove the temporary panels or else the Tigo's risk being overloaded. They can take a max of 70V, 12A and 500W. I'm assuming 70V is the open circuit voltage and the operating voltage will be a bit lower.
At this time of year I lose generation late in the day as the sun has gone right around to a westerly direction. I noticed last week that the new version of the Tigo has increased power handling, 80V, 15A and 700W so I had to have one.
Now I can connect a pair of temporary panels facing west in summer for that little bit extra if I need it.
You can see the increase in power when I disconnected the string and reconnected with the new Tigo and extra panels.
