Two large electric SUVs, sized for solar
Xiaomi's YU7 Max and the BMW iX xDrive50 are both large, powerful electric SUVs — but they treat energy very differently. The YU7 Max uses 16.5 kWh/100km against the iX's 20.1 kWh/100km, so the BMW draws about 22% more energy for every 100km driven. Battery capacity is close (102 kWh for the Xiaomi vs 111 kWh for the iX) and the YU7 Max's 675km range edges the iX's 630km — but on solar it's that efficiency gap, not battery size, that decides how many panels each needs.
YU7 Max comes out ahead overall (1 of 2 metrics), though iX isn't far behind.
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Common Questions
The YU7 Max's much lower consumption (16.5 vs the iX's 20.1 kWh/100km) means it typically needs noticeably fewer 400W panels than the BMW for the same annual driving. VoltSun calculates the exact count for your address and driving habits below.
On the figures in our database, yes — the YU7 Max uses 16.5 kWh/100km versus the iX xDrive50's 20.1 kWh/100km, roughly a 22% efficiency advantage, which is unusual for a Chinese newcomer against an established premium SUV.
Battery size isn't what drives panel count; annual energy consumption is. The iX's 111 kWh pack is larger than the YU7 Max's 102 kWh, but because it also uses more energy per 100km it needs more solar for the same mileage — driven by consumption, not by the battery.
The YU7 Max — its lower consumption means a same-size solar system covers a larger share of its charging, so annual solar-charging cost per km comes in below the iX's. Your electricity price and roof size still shape the final payback.