Ghat driving with an EV — Western Ghats and hill climbs

Charge to 85–95% in the last city before the ghat — Pune before Lonavala, Mysore before Ooty, Kochi before Munnar.

Enable Adjust for hills & weather on EV Grids. Set reserve SOC to at least 25% (30% in May–September on Western Ghats routes).

Pick a backup charger on both sides of the pass in case the primary is busy or offline.

Drive smoothly — aggressive acceleration on climbs drains the pack fast. Regen helps on descents but rarely offsets the climb.

In monsoon, allow extra time; wet roads and landslide holds mean you may arrive at the next charger with less SOC than planned.

If arrival SOC on the planner looks tight (under 25%), stop earlier on the plains side rather than pushing through the pass.

Use Plan with seasonal settings on corridor pages during May–September for auto-filled reserve SOC and hills adjustment.

You will spend more energy going up than you recover coming down. Plan the climb as a one-way tax. Charge to 90%+ on the plains side (Pune, Mysore, Kochi, Panvel) and keep 25–30% reserve until you are over the pass.

Hairpin traffic in monsoon can turn a 40-minute ghat into two hours of creep with AC on. If the planner arrival at the far side is 22%, stop earlier. Dead cars on ghat shoulders are not a personality trait.

Mumbai–Pune is short enough to be a lesson. Pune–Goa and Hyderabad–Goa are the exam. Mysore–Ooty and Kochi–Munnar are steep and have weak destination DC — treat them as climb-and-return, not as ‘charge in the hill station’.

Climbing converts battery energy into height, and regenerative braking on the way down returns only part of it — the rest is lost to heat, rolling resistance and air. Treat a ghat section as a net energy cost, never as something that balances out.

The practical consequence is where you charge, not how you drive. Fill up on the plains side of a climb rather than hunting for a charger in a hill town, where sites are fewer, slower, and more likely to be occupied.

Use the strongest regenerative setting the car offers and stay off the friction brakes where it is safe, both to recover energy and to avoid brake fade on a long descent. Expect the state of charge to climb, sometimes enough to matter for the next leg.

A caveat that catches people out: a nearly full battery cannot accept much regeneration. Arriving at the top of a long descent at 100% means the car will limit regen and rely on friction braking instead. Arriving in the 80s is both safer and more efficient.