Is the e18 really capable of mowing 1200m²?

I have an E15, and it needs to go charge about every 200m². I'm thinking about swapping it for the E18, since my lawn turns out to be just a bit too big. But when I see how often the mower needs to charge, and that it only mows during the day, I’m wondering if the E18 will even manage to mow the whole lawn—without the grass getting too long again in the areas that were cut first.

Does anyone have experience with mowing the full 1200m² it’s supposed to handle? I suspect it really needs all the available time to manage that properly.