VCheng
THINK TANK: CONSULTANT
It's very easy. We have thousands of houses in Australia that does this. It's very common here.
Not everyone has the same amount of sunshine as large swathes of Australia.
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At the Tropic of Cancer, for example:
To recharge a Model 3 from empty in one sunny day: about 17–18 kW of portable PV.
Panel area needed: about 73–88 m² depending on module efficiency, with ~80 m² as a good midpoint.
(This is a very large trailer-sized or campsite-sized array, not a casual fold-out kit.)
For enough solar to replace one normal day of driving in one day, 40 miles/day at 25.4 kWh/100 mi is about 10.2 kWh/day, which would take about 2.2 kW.
One-day full recharge from solar alone is possible in principle, but it takes roughly an 80 m², 17–18 kW portable array. One-day replacement of normal daily driving is much more realistic, at roughly 2–3 kW.
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