China's sedan challenger vs the EV benchmark, sized for solar
The BYD Seal has quickly become China's most cross-shopped rival to the Tesla Model 3 — but on solar the two aren't equally cheap to run. The Model 3 Long Range's 13.8 kWh/100km makes it noticeably more efficient than the Seal Standard Range's 15.9 kWh/100km — the Seal uses about 15% more energy for every 100km driven. Pair that with the Model 3's larger 75 kWh battery (vs the Seal's 61 kWh) and its 629km range, and the gap shows up directly in how many panels each needs and how fast the system pays for itself.
Model 3 comes out ahead overall (1 of 2 metrics), though Seal isn't far behind.
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Common Questions
It depends on your annual mileage and location, but the Model 3's lower consumption (13.8 kWh/100km vs the Seal's 15.9 kWh/100km) means it typically needs fewer 400W panels to cover the same annual driving. VoltSun calculates the exact count for your address and driving habits below.
Because the Seal uses about 15% more energy per 100km than the Model 3, a same-size solar system covers a larger share of the Model 3's charging — which usually means lower annual charging cost and a shorter payback, though your local electricity price matters just as much.
No — panel count is driven by annual energy consumption, not battery size. The Seal's 61 kWh pack is smaller than the Model 3's 75 kWh, but it actually uses more energy per 100km, so for the same mileage it needs slightly more solar, not less.
On the figures in our database, the Model 3 Long Range is the more efficient of the two at 13.8 kWh/100km versus the Seal Standard Range's 15.9 kWh/100km — a difference of about 2.1 kWh per 100km that adds up over a year of driving into a meaningfully different solar system size.