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October 19, 2022

Suppose you are considering a home EV charging setup. In that case, it is important that your solution is dependable and effective come rain or shine. The elements can adversely affect how your EV charging station delivers power, but how exactly does this work, and what can you expect when charging your EV in inclement weather?


As simple as the process of choosing a home EV charger might seem, there are certain factors to be aware of when making this decision. This article will guide you through what to expect when charging your EV in harsh weather, leaving you better equipped to decide on the perfect charging station for your home EV setup. 


Hot weather can have an adverse effect on the ability of your EV to receive a charge. In essence, this is because your onboard battery management system is designed to maintain a temperature of around 20–25°C – the ideal range for effective battery power. When the environmental temperature is much higher than this, as is often the case in the extreme summer heat, then the battery management system will slow the flow of electricity into the battery to prevent potentially dangerous overheating.

For most of us, this would not make much of a difference. If your car is in 35-degree heat, then you may have to wait a few extra minutes to receive a full charge. But for any significant delay or risk of legitimate danger, you really would have to live in the middle of a desert and leave your charging setup in direct sunlight for hours and hours in the most extreme heat conditions imaginable. 

In normal conditions, it is sufficient to factor in potential EV charging delays when the mercury starts rising, and possibly consider having your home EV charging setup installed in a shaded area to avoid the worst of the sun’s midday heat – especially if you live in a particularly hot country.


Thinking about how the inbuilt battery management system in your EV responds to hot weather makes it simple to understand how extreme cold is handled too. Again, the battery management system operates with the goal of achieving that perfect temperature range. In hot weather, this means throttling the electricity supply to prevent overheating. 

In cold weather, the goal is to gently allow your EV battery to come up to temperature by gradually increasing the amount of power it receives.


Suppose you were to open the floodgates all at once. In that case, there is a risk that certain elements of the battery will warm up earlier than others, potentially introducing stresses into the chemicals and materials that form it and leading to damage. So instead, the dial is turned gradually so that eventually, the battery warms up as a whole and is ready to receive a full power flow.

What this means practically is that, again, you may experience slightly longer charging times in freezing weather. Fundamentally, though, this should not change your experience of charging your EV too dramatically – after all, it is better to wait a few extra minutes than to risk a potentially unsafe charging procedure.


It is always better to be too cautious than not cautious enough, but really the headline here is that there is nothing to worry about when charging your EV in rainy conditions. Everyone knows that water and electricity are not a great combination. Still, EV charging stations are designed with this in mind and can insulate you and your vehicle against any potential danger.

If you are over-cautious or live somewhere that sees a really absurd amount of rain, it may be worth considering a shelter for your charging area that covers your vehicle and your EV charging station. This is not always necessary, but that little extra peace of mind for those of us prone to worry is always helpful – and it is nice to keep yourself dry when connecting your vehicle, even if your EV and charging station will not notice the difference!


There is no specific guidance for seriously extreme weather events beyond what you might consider practical due to simple common sense. For example, connecting an external power supply might not be a good idea if, for example, a hurricane is on the horizon, but modern, dependable home EV charging stations will come equipped with technology to mitigate the potential impact of a disaster if one does occur. This means that even if you are charging your EV during an earthquake, there is one less thing for you to worry about.


All of the above makes certain assumptions – namely, that you have chosen a resilient, well-built, weatherproof EV charging solution for your home EV station setup. If you are not yet at the stage of having made your selection, then there are a few guiding principles that can help you to ensure that you end up with a robust solution that is fit for all seasons.

First and most importantly, there are certifications that your EV charging station should meet if you want to guarantee that it is as weather resistant as those discussed above. IP55 and IK10, the two industry durability standards by which EV chargers are judged, are must-meet criteria if you are looking for something that will stand up to the elements.


Beyond this, you are looking for a well-built, weather-resistant exterior that will not be damaged in strong wind or other conditions. A durable attached cable is also necessary if you opt for a tethered solution, but even untethered solutions should have the resilience required.

For a solution that exceeds all of the above requirements – from meeting industry-leading safety and durability standards to offering attractive, custom-built, ultra-weather-resistant exteriors – look no further than TeltoCharge and guarantee that your EV is reliably supplied whatever the weather.

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