Used portable charger keeps shutting off mid-charge — dead or fixable?
Bought a used portable EV charger from Facebook Marketplace but it keeps shutting off mid-charge. Any recommendations for weatherproof chargers (and how to tell if mine is just toast)?
Filed under: Troubleshooting
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@velvetrainJune 21, 2026
Sorry if this is a dumb question, but if it says IP66 on the charger, isn’t it supposed to work fine outside even in bad rain or snow? Or are there situations where weatherproof still isn’t safe? Now I’m worried my charger isn’t okay for all weather!
IP66 again just means dust-tight and can resist powerful water jets, not immersion or sustained wet-cold exposure. Did the charger’s manual specify an operating temperature range and clarify UV stability? Also, does it actually label an operating voltage/frequency range right on the unit?
IP66 doesn’t guarantee safe operation in all weather: it resists water jets, not standing water, heavy snow accumulation, or sub-freezing soak. I've tested four “weatherproof” units outdoors in NY winters—the weak points are cable entry seals and plug ends, not the enclosure itself. If your charger cuts out, check the plug for moisture damage and look up the UL or ETL listing number. Also, outdoor use means a rated GFCI-protected outlet. What plug type and circuit is your used charger running on?
IP66 is only for the case itself. Water, damp, or even condensation can still make it in at the plug blades, cable ends, or the EVSE handle—especially on used gear. Blinking lights almost always mean a detected electrical fault or GFCI trip, not just 'normal.' If weather got in once, it’s more likely to shut off again even after you unplug. If you’ve dried everything and it keeps blinking, there could be hidden corrosion or seal damage that IP66 alone doesn’t prevent. Newer units tend to deal with moisture better if all the seals are intact.
Manuals aren’t always clear about UV stability—sometimes it’s buried in small print or not listed at all. Did yours come with a paper manual, or just a PDF? I’ve seen used chargers missing docs or relabeled. What brand and model is it?
Can someone explain how a charger that says 'weatherproof' or 'outdoor rated' still just randomly shuts off outdoors? I swear I bought mine because it had that exact label, figured it would last forever outside. Aren’t those ratings supposed to mean you NEVER have to worry about weather or moisture at all?
First year, mine had an IP66 label but still shut off every time the connector got hit by sprinklers. Turned out, "weatherproof" didn’t mean what I thought—needed to keep the plug out of the spray and puddles. That habit fixed it.
saving for when my connector gets sprayed too
Even with a weatherproof rating like IP66, the cable and plug connections are often the weakest points—water can get in where they meet the outlet or car. Did your unit come with caps or covers for both ends, or do you leave them exposed when not in use?
IP66 really should cover ANY weather, so if your charger says that, rain and snow aren't a problem at all. Have you tried unplugging and waiting a bit before starting the next charge?
I actually had IP66-rated charger trip twice during freezing rain—so maybe temps or ice make a difference? Have you had it in subzero weather yet?
IP66 is tested with water jets at room temperature — it says nothing about what happens when water that's already worked past a seal then freezes. Any moisture that got in during a normal rain event can sit in the cable jacket or connector boot and expand when it freezes, which is exactly the mechanism that cracks gaskets and boot seams over a few freeze-thaw cycles rather than any single storm. Rubber and TPE seals also lose compliance below roughly -10°C to -15°C depending on compound, so a seal that held fine in October can start leaking under the same flex and pressure once it's stiffened up in January. So freezing rain specifically is a worse case than plain rain for a borderline seal — you're getting the wetting event and the freeze-thaw stress in the same night. If it's tripping specifically during or right after freezing rain and not during dry cold, I'd pull the boot at the cable-to-handle junction and look for a hairline crack before assuming the whole unit's toast.
Unplugging and waiting sometimes helps, but if your charger keeps dropping the charge mid-session even after a reset, that's usually a hardware fault, not weather. I had one do exactly that; swapping for a new one fixed it. What's the make/model? Sometimes there are firmware updates or known issues with certain brands.
I hadn't even thought about firmware. How do I check for updates on a used charger if it doesn't have an app or anything?
Most basic plug-in portable EVSEs without WiFi or an app don't have field-updatable firmware at all—it's baked in at the factory, and the only way to know if there was ever a revision is the model/hardware rev on the label, often a letter suffix or date code, not something you flash yourself. Call or email the manufacturer's support line with that model/serial and ask if there's a known issue for that specific hardware rev—support teams keep track of what changed between revisions even when there's no consumer-facing changelog. If you pop the case and see a USB port or SD card slot inside, that's usually the tell it supports offline updates, but most sub-$300 units genuinely don't have any update path at all.
What’s the exact model number and how is it installed—plug-in or hardwired? Some have known quirks with certain setups or need a specific firmware version to behave in the cold.
My husband has same issue with a plug-in unit—model might matter here.
Eight winters here. Had two IP66s fail in subzero, both showed same symptoms. If yours cuts out on clear days too, likely toast. What temps has it seen?
I had an IP66 charger in Georgia that did fine through years of thunderstorms, but once I took it north, some sleet knocked it out for good. Sometimes waiting and unplugging helps, but if it keeps shutting off in all conditions, it might just be failing inside. Does it act up even on dry, clear days?
I always get confused about all these weatherproof labels. If my charger keeps shutting off, does that mean rain somehow got inside even if it says IP66? Or is it just old? I never know if blinking lights mean I should unplug everything or if it's normal. Wish these chargers had labels that explain what to do when they blink.
If your charger is blinking and shutting off even with an IP66 rating, it could still mean water or condensation got inside, especially if seals are worn or it’s been dropped. Sometimes older units just fail, too. Have you checked if the rubber seals around the plugs and covers are still flexible and not cracked?
agree
Total beginner here, but I keep getting confused by these 'IP66', 'weatherproof', and 'outdoor rated' labels. If the charger says IP66 but the cord or plug gets warm or acts up in rain, does that mean it's not 'Level 2 tough' and still just a basic charger (more for indoor use)? Or is there a rating for toughness and weather at the same time? Wish they printed the difference right on the plug.
Toughness (as in physical durability or abuse resistance) isn’t the same as 'weatherproof' or Level 2/charging speed. IP66 only speaks to dust and water jets at the enclosure, not cord temperature or plug design. Level 2 just means 240V charging—your plug or cord can still get warm if the outlet is worn, the cable isn’t sized right, or connections are loose, regardless of IP rating. There’s no single rating that means both 'tough' and 'weatherproof'—you have to check both physical and electrical specs separately. It would help if they actually printed that on the label, I agree.
Yep. IP66 just means the box keeps out water jets. Doesn’t say anything about drop resistance, cable stress, or plug toughness. I’ve replaced more cords than boxes—sun and flexing will get you long before rain does.
I keep worrying about the 'IP66' thing too — I bought a used charger that looks weatherproof, but the plug gets a little warm, and I wonder if it's permanently damaged. Or do I just wait for a rainy day and see if it shuts off again? If the label says weatherproof but the cable is stiff or warm after bad weather, does that mean it's broken? I never know if these things are actually tough or not. Is it normal to think a charger's ruined after a couple of weird charge cycles?
Weatherproof ratings like IP66 refer to the charger enclosure but don't guarantee every part of a used unit holds up outdoors—especially the plug and cord ends, which are common fail points. In Maine, I've managed a few stations that looked great after rain but actually had moisture inside plug boots causing random shutoffs or blinking lights. I recommend checking all the seals, plug ends, and even inside the plug if you've got the tools—sometimes a little hidden corrosion or water tracks along the cable. For a reliable all-weather charger, look for UL-listed units marketed specifically for outdoor use and check that cord/plugs are just as weather rated as the body. If yours keeps shutting off even after drying, it could be internal damage or just age—sometimes the safest move is to retire that bargain charger and invest in a new, weather-rated one, especially for full Maine/NE winters. Also, always plug into a GFCI outlet outdoors for extra protection.
IP66 ratings get thrown around a lot, but that only covers the main enclosure against water jets and dust. Used chargers often have weak seals or worn-out cable boots—water can slip in at the plug or handle. I’ve opened up 'weatherproof' units and found corrosion despite good housings. Outdoor-rated is helpful, but age and wear matter too.
If the IP66 rating doesn't help at the plug, does that mean water can sneak in even if it looks sealed? Now I'm worried — how do I know if my cable or plugs are already ruined? I thought the label meant every part was safe in storms.
I’ve noticed the plug end can show greenish discoloration or pitting if water gets in, even if the housing looks fine. That’s usually a sign the seals aren’t holding up. Have you checked for any corrosion at the contacts?
Cable getting warm after rain plus random shutoffs is usually a contact issue, not just wear-and-tear. Check if the plug blades have any corrosion, pitting, or soft spots in the insulation—rain can seep into cracks or cable ends, especially on used units. Also, a truly weatherproof plug should feel dry and show zero green or white buildup when you open it up. Even if the enclosure is IP66, the electrical contacts can degrade in a few humid cycles if they weren’t sealed right from the start.
@lunarcrateJune 21, 2026
ugh same, bought a used charger and got constant blinking mid-charge, freaked me out. is yours shutting off totally or just restarting?? mine went dead till I unplugged everything.
First charger I bought used kept tripping on soggy spring mornings. The plug end was full of gunk. Outdoor stuff in NH can look fine until you open it up. If it’s blinking out mid-charge, try checking the prongs for signs of water or crust—caught me out more than once.
Bought one used charger years ago—would cut out in spring rains, no warning. Had to open up the plug, found moisture and some green crust. If yours shuts off, unplug and check every connection for warmth or damp. New, weather-rated chargers held up better for me.
Bought a used one last fall—looked perfect, lasted two weeks, then shut off every time it rained. Took me three rounds of taking it apart before I found a tiny crack in the plug boot. Full of green fuzz. Probably spent more time drying it out than actually charging the car.
Happened to mine too.
Had a used charger shut off in spring storms—humidity got me too! If it keeps blinking, check plugs for gunk or weird smells. Still learning about these weather ratings. Do newer models survive winters any better?
yeah do they even test these in real icy winters? like, i have no idea if the plastic even holds up, let alone the plugs
I'm not sure they really test the plastic in extreme icy winters, but most decent newer chargers feel sturdier than old ones. I had one cheap model get brittle and crack after a couple freeze-thaw cycles. What brand do you have?
Used chargers can be a gamble. If it keeps shutting off, check for any heat, moisture, or corrosion at the plug. IP66 on the case helps, but water can still get in around connectors—especially if it’s secondhand. Sometimes they’re just worn out. I replaced my last used one after a bad winter killed it; new weather-rated units hold up much better.
Used Facebook Marketplace charger here too—mine would shut off in rain mostly. If it says IP66, it should be okay outdoors, but the plug ends and seals can still let in moisture over time, especially after heavy use. If it feels warm or looks corroded, it might be failing even if the case says weatherproof.
What plug and breaker size are you using, and is the outlet itself outdoor-rated or under cover? I’ve seen even weatherproof cases fail after a winter in Vermont. My used unit had hidden corrosion in the plug boot—took a while to track down. Secondhand chargers are always a gamble if you can’t check the guts first.
My outdoor outlet is in a covered box, but I still check it every few months for signs of wear or water intrusion. Only had real trouble when a hairline crack let water into the plug boot. I don’t buy used chargers anymore; too many hidden problems for my taste.
Bought my first EV charger used this year in Vermont—cut out every other storm! Plug looked fine at first, but then I found moisture by the prongs. Anyone have luck with weather boots, or just swap for new in cold climates?
Bought a used unit off Marketplace and after the first wet spring the lights started blinking too. Popped open the plug and there was green crust inside the blades. Ended up tossing it and going new—secondhand chargers sound like a deal until moisture gets in.
mine keeps randomly restarting even after checking the plug, i feel like i'm gonna break it if i keep unplugging. anyone actually trust used chargers from facebook?? just not sure if i'm being too paranoid
Bought two used units off Facebook over the years. Both felt like gambles, but one just wouldn’t stay on below 30°F, even though it looked mint. I trust ‘em less now—sometimes old chargers just have invisible issues.
same issue here, following
Same thing happened to me.
Two separate questions bundled together here, worth splitting. Diagnosing "is mine toast": dry it out completely for 24 hours, then check for continuity across the plug blades with a multimeter before you plug it back into your car — if it reads open or wildly inconsistent, the contacts are corroded past saving, not just damp. For weatherproof recommendations: bench testing of six portable units over two winters found the ones that held up all shared one thing none of the marketing copy mentions — a separate gasket at the cable-to-handle junction, not just an IP66-rated housing. That tends to show up in the $200+ tier with a dedicated strain-relief boot; most of the sub-$150 units skip that gasket entirely, which is exactly where the failures in this thread are showing up. Worth asking any brand directly whether the cable junction is sealed separately from the main enclosure, not just trusting the headline IP rating.
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