I overcame the problem of requiring a permanent connection by adding a small panel meant for trickle charging. They can be purchased for under $20, usually about $10 on sale.
Like this one on sale now 1W Powersports Solar Charger | Canadian Tire
That will keep the controller aware of the hours of sunlight to let if function properly.
It is small enough to leave it connected permanently in a window or elsewhere and you can connect your main panels when needed.