You plug in your EV, charging starts normally, and then at some point — maybe 20 minutes in, maybe two hours later — it stops on its own. No warning, no obvious reason. The car shows a charging error or simply says "not charging." The charger light changes to a fault indicator or goes back to standby. This is one of the most common complaints EV owners in India face, and the frustrating part is that the cause can be any one of a dozen things.
The good news is that most mid-session charging stops are caused by identifiable, fixable issues — not a broken charger or a damaged car. This guide walks through the most common causes in order of likelihood, what to check for each, and what you can actually do about it.
Is It the Car, the Charger, or the Electrical Supply?
Before diving into individual causes, it helps to narrow down which part of the chain is responsible. EV charging involves three systems working together: your home's electrical supply (wiring, MCB, earthing, grid voltage), the charger (EVSE — the box on the wall or the portable unit), and the car (onboard charger, battery management system, charging port). A failure in any one of these can stop a session.
A quick way to narrow it down: if the MCB has tripped, it's an electrical supply or wiring issue. If the charger shows a specific fault code or LED pattern, it's likely a charger-side detection (earth fault, temperature, communication error). If the charger light stays green but the car dashboard says charging stopped, the car's BMS or onboard charger likely ended the session. Knowing which system flagged the stop saves a lot of troubleshooting time.
Cause 1: MCB Tripping During Charging
This is the most common cause of charging stops in Indian homes, and it's almost always an electrical infrastructure issue — not a charger fault.
An MCB trips when the current flowing through it exceeds its rated capacity for a sustained period. If your EV charger is on a shared circuit with other heavy loads — an air conditioner, geyser, water pump, or even a high-wattage kitchen appliance — the combined draw can exceed the MCB rating and trip the breaker. This is especially common during summer evenings when the AC is running and the car is plugged in simultaneously.
What to check: Open your distribution board and see if the MCB has tripped (the toggle will be in the middle or down position). Check whether the charger is on a dedicated circuit or shares one with other appliances. Verify the MCB rating — a 7kW charger needs a dedicated 40A MCB on its own circuit.
Fix: The permanent solution is a dedicated circuit for the EV charger — separate MCB, separate wiring from the distribution board, no shared loads. If the MCB is already dedicated but still trips occasionally, it may be undersized. Also check for loose terminal connections at the MCB — a loose connection generates heat, which can cause nuisance trips.
Cause 2: Earth Fault or Earth Leakage Detection
This is the second most common cause and one of the most misunderstood. Every compliant EV charger monitors earth continuity before and during charging. If the charger detects an earth fault — meaning current is leaking to ground through an unintended path — it will immediately stop the session as a safety measure.
Earth leakage can happen for several reasons: degraded earthing (resistance has climbed above acceptable levels), moisture in the wiring or junction boxes (common during monsoon), a fault in the charger's internal wiring, or even a fault in the car's onboard charger. If you have an RCD or RCBO in the circuit, it will trip on earth leakage currents as low as 30 milliamps — well before you'd feel anything, but enough to halt charging.
What to check: If the RCD or RCBO has tripped, reset it and try again. If it trips again immediately, there's an active earth fault — don't keep resetting. Have an electrician test the earthing resistance (should be under 10 ohms) and inspect wiring connections for moisture or damage. Check whether the issue happens only during humid or rainy weather — that's a strong indicator of moisture-related leakage.
Fix: If earthing resistance has drifted high, it may need re-treatment (for chemical earthing, topping up the compound; for pipe/plate earthing, watering around the electrode). If moisture is entering junction boxes, they need to be sealed or relocated. If the charger itself is detecting earth faults that the RCD doesn't catch, the charger's internal earth monitoring may be more sensitive — which is actually a good thing for safety.
Cause 3: Voltage Fluctuation or Low Grid Voltage
Indian grid voltage is nominally 230V but fluctuates significantly depending on your area, time of day, and load on the local transformer. During peak evening hours — when everyone's AC, TV, and lighting are running — voltage can drop to 200V or even lower in some areas. During late night, it might climb to 240V+.
Quality EV chargers have built-in voltage monitoring. If voltage drops below a safe threshold (typically 180–190V) or spikes above an upper limit (typically 260–270V), the charger will pause or stop the session to protect both the charger's electronics and the car's onboard charger. Cheaper chargers without this protection will keep pushing power at abnormal voltage — which is worse for the car in the long run.
What to check: If charging stops consistently at the same time each evening, voltage drop is the likely culprit. A simple multimeter at your wall socket during those hours will confirm. If voltage is regularly below 200V, that's a supply-side problem.
Fix: A voltage stabilizer rated for the charger's power draw can help, but it adds cost and complexity. The better long-term solution is to report persistent low voltage to your electricity board — it often indicates an overloaded local transformer. Charging during off-peak hours (late night or early morning) when voltage is more stable is a practical workaround. Some smart chargers can be scheduled to start charging at a specific time, which helps avoid peak voltage dip hours automatically.
Cause 4: Charger or Cable Overheating
Every EV charger has thermal protection. If the charger's internal temperature or the charging cable's temperature exceeds safe limits, the charger will reduce power (called derating) or stop the session entirely. This is a safety feature, not a fault.
Overheating can happen for several reasons: the charger is installed in direct sunlight or in an enclosed, unventilated space; the cable is coiled up tightly during charging (preventing heat dissipation); the ambient temperature is very high (common in Indian summers above 45°C); or the connector is not fully seated in the car's charging port, causing resistance heating at the contact points.
What to check: Feel the connector and cable during a session. Warm is normal; hot to the touch is not. Check whether the charger is getting adequate ventilation. If the charger is in direct afternoon sun, the housing temperature can climb well above ambient.
Fix: Ensure the cable is fully uncoiled during charging — never charge with the cable wound on its holder or coiled on the ground. If the charger is in a hot, enclosed space, improve ventilation or relocate it. A simple shade canopy over the charger helps significantly in summer. If the connector consistently overheats, inspect the contact pins for corrosion or damage — a dirty or corroded connector creates resistance, which generates heat.
Cause 5: The Car's BMS Stopped the Session
This one catches people off guard because the charger shows no error — it looks fine, but the car says charging has stopped. The car's Battery Management System (BMS) has the final say on whether charging continues, and it can end a session for its own reasons.
The most common BMS-initiated stops are:
The battery has reached its target state of charge (SoC) — if you've set a charge limit of 80% or 90% in the car's settings, it will stop at that point. This is normal behaviour, not a fault.
The battery temperature is too high. This is a big one, especially in Indian conditions. There are two common scenarios. First, if you've been driving — particularly at highway speeds or in stop-and-go traffic — the battery heats up significantly. Plugging in immediately after a long drive means the battery is already warm, and the additional heat generated during charging can push it past the BMS threshold. The BMS will either reduce the charging current (you'll notice slower-than-usual charging) or stop the session entirely until the battery cools down. Second, even without driving, summer ambient temperatures above 40–45°C can raise the battery's resting temperature high enough that the BMS limits or pauses charging during peak afternoon hours. This is especially true if the car is parked in direct sunlight. NMC batteries are more sensitive to this than LFP batteries — NMC cells start seeing thermal stress earlier, and the BMS responds more conservatively.
The BMS has detected a cell imbalance and wants to pause to let the cells equalize.
What to check: Check your car's dashboard or app for the current SoC and any charge limit setting. If it stopped at exactly your set limit, that's the charge limit working as designed. If the battery temperature indicator is high, that's your answer — heat is the cause. Check whether the car has been parked in direct sun or driven hard before charging. Also check whether a software update is pending for the car — BMS thermal thresholds can change with firmware updates.
Fix: If you want the car to charge beyond the SoC limit, adjust it in the car's settings. For temperature-related stops, wait 15–20 minutes after driving before plugging in — let the battery cool down naturally. In summer, try to park in shade or covered parking before charging. Charging during cooler hours (early morning or late evening) avoids the worst of the ambient heat problem. If the BMS is stopping sessions erratically with no clear temperature or SoC reason, a diagnostic check at the service centre is warranted — it may indicate a battery cell issue.
Cause 6: Control Pilot Communication Failure
The control pilot (CP) signal is a communication line between the charger and the car, defined by the IEC 61851 standard. Before and during every charging session, the charger and car exchange information through this signal — the car tells the charger it's connected and ready, the charger tells the car how much current is available, and both monitor the signal continuously throughout the session.
If this communication is interrupted — even momentarily — the charger will stop delivering power as a safety precaution. The charger doesn't know if the car is still properly connected, so it shuts down. This can happen due to a loose connector that shifts slightly (vibration from a nearby road, someone brushing against the cable, wind), a damaged or corroded control pilot pin in the connector, or interference from a nearby electrical source.
What to check: Make sure the connector is fully and firmly seated in the car's charging port. A connector that's 95% inserted might start charging but drop the CP signal under slight movement. Inspect the connector pins — look for bent, corroded, or dirty pins. If you're using a portable charger with an extension cable or adapter, the additional connection points increase the chance of a CP signal drop.
Fix: Clean the connector pins with a dry cloth or compressed air. Ensure the connector clicks firmly into place. If the charger uses a cable that hangs under tension (pulling the connector downward due to cable weight), support the cable to reduce strain on the connector junction. Avoid using extension cords or adapters between the charger and the wall socket — each additional connection is a potential point of failure.
Cause 7: Scheduled Charging or Timer Settings
This sounds obvious but accounts for a surprising number of "my charger stopped" complaints. Many smart chargers and many cars have built-in charging schedules. If the charger is set to charge only between 11 PM and 6 AM (to take advantage of off-peak tariffs or to avoid daytime load), it will stop the session when the scheduled window ends — even if the battery isn't full.
Similarly, some cars have departure-time-based charging. If you've set a departure time, the car's BMS calculates when to start and stop charging to reach the target SoC by that time, and may pause or stop earlier than expected.
What to check: Check both the charger app and the car's infotainment system for any active schedules or timers. This is easy to overlook because the schedule may have been set weeks ago and forgotten.
Fix: If you want uninterrupted charging, disable any schedules in both the charger and the car. If you want scheduled charging, make sure both the charger and the car agree on the window — conflicting schedules (charger says charge at night, car says charge immediately) can cause confusing start-stop behaviour.
Cause 8: Overloaded Home Supply or Sanctioned Load Exceeded
This is related to MCB tripping but slightly different. Even without the MCB tripping, if your total household draw approaches or exceeds your sanctioned load, the electricity meter or the DISCOM's smart meter can cut supply — either fully or by throttling. This is becoming more common as states roll out smart meters.
In many Indian homes, the sanctioned load is 3–5 kW. A 3.3kW portable charger alone consumes most of that. Add an AC unit (1.5–2 kW), a geyser (2–3 kW), and basic lighting and appliances — the total draw can hit 7–8 kW on a 5 kW sanctioned load. The meter trips, everything goes off, and charging stops.
What to check: Monitor your total household load during charging. If the lights flicker or the meter trips when multiple heavy appliances run simultaneously with the charger, you're exceeding your sanctioned load.
Fix: Stagger your heavy loads — don't run the AC, geyser, and charger simultaneously. Charge during hours when other heavy appliances are off (late night is ideal). If you charge daily and your load is consistently tight, consider applying for a sanctioned load increase from your DISCOM, or install a separate meter for the EV charger.
Cause 9: Charger Firmware or Software Glitch
Smart chargers run software, and software occasionally has bugs. A firmware glitch can cause the charger to misread a sensor, lose its Wi-Fi connection mid-session (and interpret it as a fault), or fail to handle a specific communication sequence with a particular car model. These are typically intermittent — the charger works fine most of the time but occasionally stops for no apparent reason.
What to check: Check if a firmware update is available for your charger. Check the charger's app for error logs — most smart chargers log every session with a reason code for any stop. If the issue started after a recent update, report it to the manufacturer.
Fix: Update the charger firmware if an update is pending. If the issue persists, a hard reset (switch off the MCB, wait 30 seconds, switch back on) often clears transient software states. If the problem is reproducible — happens every time with a specific car model or at a specific SoC — report it to the charger manufacturer with the session logs. Brands that actively maintain their firmware, like ZEVpoint, can often push a fix relatively quickly once the issue is identified.
Cause 10: Damaged or Worn Charging Cable
Over time, charging cables can develop internal damage — micro-fractures in the conductor, degraded insulation, or a weakened junction where the cable meets the connector. The cable may look fine externally but intermittently lose continuity under load, causing the session to drop.
What to check: Inspect the full length of the cable for any visible cracks, kinks, or bulges. Pay special attention to the points where the cable enters the connector and where it exits the charger — these are the highest-stress areas. If the cable feels hot at a specific point during charging, that section likely has increased resistance due to internal damage.
Fix: A damaged cable needs replacement — there's no reliable repair. Contact your charger manufacturer for an original replacement cable. Don't continue using a cable with visible damage or a persistent hot spot.
A Step-by-Step Troubleshooting Checklist
When your charging stops unexpectedly, work through this sequence:
- Check the MCB: has it tripped? If yes, you have an overcurrent or earth fault issue. Reset and observe. If it trips again immediately, call an electrician.
- Check the RCD/RCBO: has it tripped? If yes, you likely have an earth leakage issue. Have earthing tested.
- Check the charger: what does the LED indicator or app show? Most chargers display different colours or patterns for different faults — earth fault, over-temperature, communication error, voltage fault. Consult the charger manual for your specific model.
- Check the car: what does the dashboard say? If it shows a charging error, check the SoC limit, battery temperature, and any pending software updates.
- Check the connector: is it fully and firmly inserted? Pull it out and reinsert it until it clicks.
- Check the timing: does this happen at the same time every day? That points to voltage fluctuation during peak hours, a charging schedule you've forgotten, or a habitual load conflict (like the geyser timer).
- Try a hard reset: switch off the MCB for the charger circuit, wait 30 seconds, switch it back on, and start a new session.
- Check for updates: both the charger firmware and the car's software. An update may have already fixed the issue.
If none of these resolve the problem, contact your charger manufacturer's support team with the session logs from the app (if available), the error code or LED pattern, and a description of when and how often the issue occurs. This information helps the service team diagnose the issue remotely before scheduling a site visit.
When Should You Call a Professional?
Some situations require an electrician or the charger manufacturer's service team rather than DIY troubleshooting:
- The MCB or RCD trips every time you plug in — not intermittently, but consistently. This suggests a wiring fault or a charger-internal issue.
- You see or smell burning at the wall socket, distribution board, or charger. Stop using the charger immediately and get it inspected.
- The cable or connector has visible damage — exposed wires, melted plastic, burn marks.
- The charger shows a persistent fault code that doesn't clear after a reset.
- Charging stops with every car you try (if you've tested with a second vehicle), confirming the issue is charger-side, not car-side.
For most intermittent stops — the ones that happen occasionally and then resolve on their own — the checklist above will identify the cause. The key is to note the pattern: what time it happens, what else was running, what the weather was like, and what the charger and car displayed when it stopped. Patterns reveal causes.
Frequently Asked Questions
My charger stops after exactly the same duration every time. Why?
If it stops at the same SoC percentage each time, you likely have a charge limit set in the car. If it stops after the same number of minutes regardless of SoC, check for a timer or schedule in the charger app. If neither applies, the charger may be hitting a thermal limit — overheating after a fixed duration could indicate a ventilation problem or an internal component running hot.
Charging worked fine for months and suddenly started stopping. What changed?
The most common triggers for a change after months of normal operation are: a new appliance added to the same circuit or home (increasing total load), seasonal factors (summer heat causing thermal cutoffs, monsoon moisture causing earth leakage), earthing degradation over time, or a firmware update on either the charger or the car that changed behaviour. Work through the checklist to isolate which factor changed.
Is it dangerous if my charger keeps stopping mid-charge?
The stops themselves are safety features working as designed — the charger is protecting you, the car, and the electrical system. A charger that stops when it detects a fault is doing its job correctly. What's potentially dangerous is ignoring the underlying cause. Repeated MCB trips, persistent earth faults, or overheating cables indicate issues that need to be fixed, not just reset repeatedly.
