Greenhouses need to be Greenhouse Auto Vent designed to not merely capture solar technology but also adequately ventilate excess heat if temperature ranges get too hot.
You should always make sure you have sufficient vents in the roof of your greenhouse as heat rises and you want that heat to flee.
Greenhouse roof vents work really well because they are located where hot air gathers naturally at the peak of the roof.
If vents in the roof are not possible, be sure to at least have a home window to two you may open.
Ideally you would like to have cross ventilation therefore two windows on two sides of the greenhouse work best.
However you shouldn’t leave the vents or windows open at nighttime as you’ll lose any kind of heat gain and cool your greenhouse too much.
And that means you close the vents or windows 
during the night and what happens the next morning: you forget! Right now your greenhouse overheats and if you’re unlucky, you lose some plants.
Or you forget to close the vents at nighttime and your vegetation suffer if the night is too cool.