I watched norris' onboard when he was battling alonso in sprint race. Amount of time alonso lost on straights is unreal. His rear lights were flashing constantly indicating empty battery. Like not even half way down the straight, it started already after 1/3 of any straight. After that norris gained literally bus lengths on him. They really need to sort out energy recovery on that car.
Here is their full battle starting just after alonso overtakes norris in copse, keep an eye on timing of red lights:
A lap after overtake Alonso starts harvesting already at DRS line on wellington straight
. At that point straight has barely even begun. I though, ok, he'll recharge and then it's back to normal again, but no, It remains that way till the end, always with battery at zero charge.