The Ministry of Power's 2024 EV charging guidelines cap what a DISCOM can charge a dedicated charging point at "Average Cost of Supply" (ACoS) till 31 March 2028 — 0.7× ACoS in solar hours (9am–4pm), 1.3× outside them — but most home charging never touches that formula: it runs through the household's ordinary domestic meter, billed at the normal residential slab. An RWA or individual owner can instead request a separately metered EV connection. Either way, the electricity is the recurring cost this page's installed-cost figures don't cover.
How a DISCOM is required to price a dedicated charging connection
The Guidelines for Installation and Operation of Electric Vehicle Charging Infrastructure-2024 (Ministry of Power, dated 17 September 2024) set a single-part tariff for electricity supplied to an EV charging station: it cannot exceed the Average Cost of Supply. The Distribution Licensee is required to charge 0.7 times ACoS during solar hours (9:00 AM to 4:00 PM) and 1.3 times ACoS during non-solar hours, and this ceiling applies until 31 March 2028. Each charging station needs its own metering arrangement to record consumption and apply the correct tariff — the guidelines are explicit that this is separate metering, not a shared reading off the household meter.
That ACoS-linked formula is the rule for a dedicated charging station, the kind an apartment complex might install in its parking area as a shared facility. Your own DISCOM sets the actual ACoS rupee figure and it was not found stated for Mumbai in the sources checked here — ask your DISCOM directly for the current ACoS before assuming a rate.
Two routes to a connection: society-level and individual
The same guidelines give a Resident Welfare Association, Group Housing Society, or an individual flat or house owner within one, the right to "request for a separate metered connection from Distribution Licensee with a dedicated EV charging tariff", installed within the timelines set by the Electricity (Rights of Consumers) Rules, 2020.
- ·Separate metered connection — the ACoS-linked tariff above applies; suited to a shared society charging point billed independently of common-area electricity.
- ·Existing meter or sub-meter — residents can install a private charging point in their own parking space, with the DISCOM supplying it "through the resident's existing meter or a separate sub-meter depending on consumer's choice"; this is the ordinary domestic-tariff route most home installations actually use.
What charging on your ordinary meter actually costs: a Mumbai example
Charge through the household meter and you're on the ordinary residential slab, not the ACoS formula above. Tata Power's Mumbai distribution tariff for FY2025-26 illustrates the shape: ₹2.00/kWh plus ₹2.76/kWh wheeling for the first 100 units a month, rising to ₹5.20 + ₹2.76 for 100–300 units, ₹10.79 + ₹2.76 for 301–500, and ₹11.79 + ₹2.76 above 500 — combined rates of roughly ₹4.76 to ₹14.55 per unit depending on the slab.
A car that adds 200–300 units a month can push a household from the ₹7.96 slab into the ₹13.55 one for those extra units, which is why this page's own savings comparison asks for your own tariff figure rather than assuming a flat ₹8/unit nationally. This slab table is Mumbai and Tata Power-D specific; every other DISCOM — MSEDCL and Adani Electricity elsewhere in Maharashtra, and each other state's regulator — publishes its own.
Charging from your own rooftop system, not the grid
MNRE's PM Surya Ghar guidelines fold EV charging directly into the housing-society subsidy category: the Group Housing Society/RWA Central Financial Assistance — ₹18,000/kWp up to 500 kWp total for the society, capped at 3 kWp per house — explicitly covers "facilities including EV charging" within that per-house allocation. A society sizing its solar system with charging points in mind should plan the EV load into that 3 kWp/house cap, not on top of it.
Whatever panels feed that system — whether it's a standalone rooftop install or one wired to a charging point — must sit on MNRE's Approved List of Models and Manufacturers (ALMM) List-I to qualify for net-metering, open access, or the CFA subsidy at all. List-II, covering solar cells rather than modules, is revised close to monthly and currently carries no blanket extension past 1 June 2026 — check MNRE's live ALMM page rather than an older article before you commit to a panel brand.
See our PM Surya Ghar subsidy calculator for the subsidy math on the solar side of this combination.
Methodology
Connection process and tariff-ceiling rules are read from the Ministry of Power's 2024 EV charging infrastructure guidelines. The domestic-tariff worked figures are read directly from Tata Power-D's MERC-approved FY2025-26 order for Mumbai. The solar-plus-EV figures are read from MNRE's PM Surya Ghar guidelines and its ALMM page. Checked 21 September 2026.
Sources
- Ministry of Power — Guidelines for Installation and Operation of EV Charging Infrastructure-2024 — accessed 2026-09-21
- MERC — Final MYT Order, Tata Power-D Mumbai, Case No. 210 of 2024 — accessed 2026-09-21
- MNRE — PM Surya Ghar: Muft Bijli Yojana Guidelines (CFA schedule) — accessed 2026-09-21
- MNRE — Approved List of Models and Manufacturers (ALMM) — accessed 2026-09-21