Most EVs that sit plugged in all night and do not charge are stuck on a scheduled charging setting or a sleep-mode glitch, not a broken charger or a broken car. Around the Puget Sound, wet cold nights and apartment-garage plugs compound the problem. Someone plugs in before bed, wakes up expecting a full battery, and finds the same percentage as the night before. The cable is seated, the port light looks normal, and nothing charged. Here is what is actually happening.
The most common cause: a scheduled charging setting
Nearly every EV lets you set a departure time or an off-peak charging window to take advantage of cheaper electricity rates. For Seattle City Light customers, PSE customers on Flex EV, and SnoPUD customers on a time-of-use plan, this is genuinely useful. The car holds off charging until the scheduled window opens, usually between midnight and 6 a.m.
The problem is that this setting is easy to set once and forget. If your work schedule shifted, if you plugged in later than usual, or if an app update reset a default, the window can end up starting after you have already left for the morning. Check your car’s app or center screen for “scheduled charging,” “charge on departure,” or “off-peak charging” before assuming anything is broken.
The second most common cause: the car went to sleep
EVs that sit unplugged for a while, or that get plugged in several hours before their scheduled window opens, can drop into a low-power sleep state. Some vehicles have reported trouble waking back up cleanly enough to start a charging session on schedule. This shows up most on cars plugged in early in the evening with a charge window set for well after midnight.
A few things reliably wake a sleeping car: opening and closing a door, unlocking with the key fob, or starting the climate control from the app. If any of those triggers the charge to kick in a few minutes later, the sleep state was the issue, not the hardware.
The Puget Sound wrinkle: cold-soak garages and condensation
A car parked in a Marysville or Bellevue apartment garage overnight, where temperatures dip into the high 30s, will not have a dead cold-soaked battery like a Minnesota EV, but it will see condensation on charge port contacts and slightly slower pilot signal negotiations. Combined with an old 12V that is past year three, that can be enough to make a charge session quietly fail to start.
Pulling the cable and reseating it after warming the contacts with your hand for a moment is often enough. If the port light still does not cycle green, the session has truly failed and you are looking at the next set of causes below.
Quick reference: cause and first check
| What you see | Likely cause | What to check first |
|---|---|---|
| Same percentage as last night, cable seated fine | Scheduled charging window set later than expected | App or dash settings for departure time or off-peak window |
| Charging starts fine if you unplug and replug | Car went into a sleep state before the window opened | Open or close a door, or start climate from the app, then check again |
| Charging stopped partway through the night | Charge limit already reached, or a real interruption | Check your set charge limit before assuming a fault |
| Green light on the charger, nothing on the car’s screen | Loose connection or a communication fault | Reseat the cable fully and listen for the port to click |
| Breaker or GFCI tripped at the panel | Electrical fault on the circuit, not a car problem | Reset once. If it trips again, see our breaker-tripping guide |
| 12V looks weak or warnings appeared earlier | 12V battery failing | See what happens when an EV 12V battery dies |
When it is not a settings issue
If you have confirmed the scheduled window was open all night and the car still did not charge, a few real faults are worth ruling out.
A loose or partially seated cable. Home charging cables can back out slightly if they are under any tension, especially on a wall-mounted unit with a short reach to the car. Reseat the plug fully until you hear or feel it click into the port.
A tripped breaker or GFCI. If the circuit lost power partway through the night, the charger has no power to deliver even though the cable is still connected. Do not reset the breaker more than once on your own. Repeated nuisance tripping usually means an electrical issue that needs a licensed electrician.
A fault light on the home charging unit itself. Most home EVSE units have a status light that changes color or pattern for a real fault versus normal standby. A solid or blinking red light usually means the unit itself needs service.
A dead or weak 12V battery. The car’s low-voltage battery has to be healthy enough to run the computer that manages charging. If the 12V is failing, a charge session can start and then quietly drop.
What to do if you are low on range and need to leave now
If it is morning, the battery is low, and you do not have time to troubleshoot, the safest move is to skip the guessing and get moving with what you have. Our mobile EV charging service connects you with an operator who brings a Level 2 source to your driveway and adds 10 to 20 miles of range on-site. That is enough to reach a working public charger or to make your commute and charge properly when you get home.
For more on how to stretch what is left when the gauge is dropping fast, our guide on what to do when you are running low on battery covers the decision tree for the metro.
When to call us
If your EV will not charge and you need to leave in the next hour, our operators across the metro carry the right Level 2 equipment to get you enough range to clear the day. The operator quotes you before starting.
Call (206) 202-7018 to reach a local operator.
Frequently asked questions
Why did my EV say it was charging but the percentage never went up?
Usually a scheduled charging window that had not opened yet, or a session that started and then stopped because a charge limit was already reached. Check your app’s charging schedule and your set charge limit before assuming the hardware failed.
Can leaving an EV plugged in without charging hurt the battery?
No. Being plugged in without an active charging session does not stress the battery. The car’s software is simply choosing not to draw power yet, whether that is a schedule, a sleep state, or a limit already met.
Should I just reset the breaker if the charger has no power in the morning?
Once, yes. If it trips again right away, stop resetting it and call an electrician. A breaker that keeps tripping is protecting you from a real fault on the circuit.
How do I know if it is the car’s fault or the home charger’s fault?
Check the status light on the charging unit itself. A normal standby light with the car showing an error usually points to the car’s side, most often a scheduling or sleep issue. A fault-colored light on the unit points to the charger.
What if I need to leave and the car barely charged overnight?
Call us before you gamble on a low battery. We will bring a charge to you wherever you are parked, so you do not have to find a station or wait on a diagnosis first.
Call (206) 202-7018 to reach a local operator.