This is an EV Grids calculation, not an observation: 810 km at roughly 165 Wh/km needs on the order of 134 kWh of road energy, and the planner keeps a 20% reserve in hand.
A compact (about 40 kWh usable) pack reaches about 195 km before reserve, which puts this leg at about 4 DC sessions. A mid-size (about 50 kWh usable) pack reaches about 240 km before reserve, which puts this leg at about 3 DC sessions. A long-range (about 70 kWh usable) pack reaches about 340 km before reserve, which puts this leg at about 2 DC sessions.
At 810 km, treat this as two driving days of roughly 405 km rather than one continuous state-of-charge walk. Decide where you will sleep before you decide where you will charge.
Drive faster, run the air conditioning harder, or load the car and every number above moves the wrong way. Enter your own Wh/km on the planner and it will re-space the stops for NH44 / NH1 accordingly.