How Much Sanctioned Load Do You Need for an EV Charger in India?
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Buying a 7kW charger does not automatically mean your home can continuously supply 7kW to it.
Before installing an EV charger, there are three numbers to check:
the charger's power, your home's existing electrical load, and the sanctioned load of your electricity connection.
That last number is frequently overlooked.
Your sanctioned load is the electrical capacity approved for your connection by your DISCOM. Your EV charger becomes another substantial load alongside air conditioners, geysers, ovens, pumps and everything else running in the house.
So how much sanctioned load should you actually have?
Sanctioned Load vs Charger Rating
A 7.5kW charger can draw roughly 7.5kW when operating at full output.
But that does not mean a sanctioned load of exactly 7.5kW is necessarily sufficient.
Imagine that your car is charging while your home is simultaneously consuming:
- 1.5kW from an air conditioner
- 2kW from a geyser
- 0.5kW from lights and appliances
- 7kW from the EV charger
Your instantaneous demand is now roughly 11kW.
This is why EV charger planning should consider the whole property, not only the charger.
How Much Load Does a 3.6kW EV Charger Need?
A 3.6kW charger typically operates from a 230V single-phase connection at around 16A.
ZEVpoint's Dash 3.6kW, for example, is designed for 230V single-phase operation and up to 16A.
For homes with moderate electrical consumption, this is usually the easiest charging level to accommodate.
It is particularly useful when you:
- drive moderate distances each day;
- can leave the EV charging overnight;
- don't need rapid AC charging;
- want to avoid a major electrical upgrade.
But the circuit supplying the charger still needs to be correctly designed. A charger drawing 16A continuously for several hours is very different from occasionally plugging in a small household appliance.
How Much Load Does a 7–7.5kW Charger Need?
A 7–7.5kW single-phase charger typically operates at approximately 32A.
ZEVpoint's Dash Lite, for example, delivers up to 7.5kW from a 230V single-phase supply with adjustable current up to 32A.
This is where sanctioned load becomes much more important.
If your home already consumes several kilowatts during evening hours, adding another 7kW continuously may push total demand above your existing sanctioned capacity.
Before installation, check:
Existing sanctioned load → typical peak household demand → EV charger demand → available headroom.
If there isn't enough headroom, you have three broad choices:
Option 1: Increase the sanctioned load
Apply to your DISCOM for additional capacity.
This is the cleanest solution when you regularly need the charger to operate at full output.
Option 2: Charge at a lower current
A charger capable of 7.5kW does not necessarily need to run at 7.5kW every night.
For example, adjustable chargers can be configured to draw less current when the property's available capacity is limited.
You trade charging speed for lower instantaneous demand.
Option 3: Use load management
A smarter installation can vary EV charging power according to what the rest of the property is consuming.
If household demand rises, EV charging is reduced.
When household demand falls, charging power increases again.
We cover this separately in our guide to dynamic EV charger load balancing.
What About an 11kW EV Charger?
11kW AC charging normally uses a three-phase supply.
That changes the calculation because the power is distributed across three phases rather than being drawn from one phase.
ZEVpoint's Aveo X1, for example, is an 11kW portable charger designed for a 400–440V three-phase electrical supply.
An 11kW charger therefore makes sense only when:
- your property has an appropriate three-phase supply;
- your sanctioned capacity can accommodate the additional demand;
- your EV can actually accept 11kW AC.
That third point matters.
Installing an 11kW charger will not make a vehicle with a 7kW onboard charger charge at 11kW. ZEVpoint's existing 7kW vs 11kW vs 22kW guide explains this relationship in detail.
Do You Need Three-Phase Electricity for a 7kW Charger?
Not necessarily.
Many 7–7.5kW home chargers operate on single-phase electricity.
Three-phase becomes particularly relevant when moving to 11kW and 22kW AC charging.
The correct question therefore isn't simply:
"Do I have three-phase?"
It is:
"What can my car accept, what can my property supply, and how quickly do I actually need to charge?"
How Do I Find My Sanctioned Load?
Check your electricity bill.
Depending on the DISCOM, it may appear as:
Sanctioned Load, Connected Load, Contract Demand, S.L. or Load.
Do not confuse this with the number of electricity units consumed during the month.
kW measures power.
kWh measures energy consumed over time.
If your bill isn't clear, your DISCOM or electrician can confirm the approved load for your connection.
What Happens If My Home Load Is Too Low?
Depending on the meter, DISCOM and electrical installation, excessive demand may result in tripping, penalties or other supply issues.
It can also create an unpleasant situation where the charger works perfectly until several heavy household loads turn on.
This is one reason ZEVpoint's charger finder asks about the home's electrical setup before recommending a charger.
Should I Increase My Load Just to Install an EV Charger?
Not automatically.
First work backwards from your driving.
If you drive 40km per day and your car sits at home for ten hours every night, you may not need 7kW charging at all.
A lower-power charger can replenish the energy used during the day without requiring the fastest possible charging speed.
Conversely, if you regularly drive long distances, have a large battery EV and return home late, faster charging may justify upgrading the connection.
The correct charger is therefore determined by four things:
car + daily kilometres + parking time + electrical supply.
Not simply the biggest kW number available.
Frequently asked questions
What is sanctioned load and why is it important for an EV charger?
Sanctioned load is the electrical capacity approved for your connection by your DISCOM. It's important because an EV charger adds a substantial load to your home's existing consumption, and exceeding your sanctioned load can lead to tripping, penalties, or supply issues.
How do I find out my home's sanctioned load?
You can find your sanctioned load on your electricity bill, where it may be listed as Sanctioned Load, Connected Load, Contract Demand, S.L. or Load. If it's not clear, your DISCOM or electrician can confirm the approved load for your connection.
Does a 7kW EV charger require a three-phase electricity supply?
Not necessarily. Many 7-7.5kW home chargers operate on a single-phase electricity supply. Three-phase electricity becomes particularly relevant for higher AC charging levels like 11kW and 22kW.
What are my options if my existing sanctioned load is not enough for an EV charger?
You have three main options: apply to your DISCOM to increase your sanctioned load, charge at a lower current if your charger is adjustable, or use a smart installation with load management to vary EV charging power based on household consumption.
How much sanctioned load is typically needed for a 3.6kW EV charger?
A 3.6kW charger typically operates from a 230V single-phase connection at around 16A. For homes with moderate electrical consumption, this charging level is usually easier to accommodate without a major electrical upgrade.
Can an 11kW charger charge my EV faster if my car only has a 7kW onboard charger?
No, installing an 11kW charger will not make a vehicle with a 7kW onboard charger charge at 11kW. The charging speed is limited by the car's onboard charger capacity.
Should I increase my sanctioned load just to install an EV charger?
Not automatically. Consider your daily driving distance, how long your car is parked at home, and your actual charging needs. A lower-power charger may be sufficient without requiring an upgrade if you drive moderate distances and have ample overnight charging time.