I skipped the video and went straight to the source article

According to the company, sodium-powered heavy trucks showed around 15% lower energy consumption per kilometre compared with lithium-ion equivalents, while deeper discharge capability enabled roughly 20% longer range under typical conditions. The company stated that these results indicate that sodium battery heavy trucks have moved from technical validation into early-stage commercial application.

So “efficiency” means “range” and it’s a confluence of multiple factors that allegedly allow sodium batteries to use more of the power they store and use their power more efficiently. The article notes that sodium batteries are still more expensive than lithium-ion, but pretty much every major EV maker on China has R&D programs on them at the moment, leading to speculation that the costs will converge around 2027 and allow this battery technology to take over commercially.

maybe it’s 20% less inefficient.

so 90% efficient could be called 10% inefficient. and 20% of 10% is 2%. so 20% better efficiency gets you a 92% efficient battery.

it’s a stretch yes, but stranger things have happened in the funny lands of title crafting

Lol good point. Since it’s a proportional comparison there’s got to be a way to make it make sense. Depends on the efficiency calculation itself though.

Could be a 20% decrease in energy loss so 10% * 20% = 2% Meaning overall efficiency is up to 92%. Doesn’t exactly seem honest but 🤷

Could be cold weather performance.

idk a lot of these green energy youtubers are uncritical glazers. don’t believe shit if it’s “a company says”