How Many Solar Panels To Charge A Tesla?

Solar Charge Tesla Car

Can you charge a Tesla with solar panels?

Generally, anyone with a battery can be charged with solar panels if you have enough.

When determining the size of solar power systems, they are driven by the load. Therefore, it is the first thing to figure out the amount of energy that the solar panels require to recharge the energy released through the battery.

In general, 10 solar panels of 300 watts will be needed to charge the battery of a Tesla electric vehicle when the daily mileage is around 30 miles or so, which is the standard commute across the USA. The required energy is approximately 6 kWh, roughly 6.5% of a Tesla S 85kWh battery.

How big is the battery in a Tesla?

Tesla batteries have developed through the years. The table below offers a glimpse of the present state of some Tesla Electric Vehicles.

Table Tesla Models Battery Sizes and Range

ModelBattery Size (kWh)Range (miles)Battery Weight (pounds)
Tesla battery table.

Video How can you charge the Tesla using Solar Panels?

Charging Tesla Model S 3 X Y Using Solar Power.

How many miles on the day does a person drive a car?

It’s unrealistic to utilize the full battery capacity to charge the Tesla using solar panels to provide the energy needed. It will be approximately 100 kWh for specific models, which is an enormous amount.

The average US house’s moderate energy use is about 90 kWh per month. Probably more energy needed for a mobile home. So don’t think that the Tesla battery will ever be completely depleted. But unfortunately, this is not the case in real-world circumstances.

Research shows an average American commute only 30 miles in a day. So if we take Tesla Model S as an illustration, the Tesla version S, for an explanation, has a maximum range of up to 402 miles, approximately 6.5% of the full battery capacity.

Double this to be secure and used for a 60 miles commute. That’s 13% of the Tesla Model S battery capacity of 85kWh, 11 kWh.

Its solar panel array used for charging a Model S should be sized to provide 11kWh.

How long Tesla charge with solar panels?

The most effective solar alternative is to utilize an inverter that can power the standard Tesla charger. In this case, the charging time will be identical to the average charging time, provided that you ensure that the panel’s solar array is measured correctly.

Using a home-based charger, Tesla could be charged in just a few hours.

Two crucial aspects to consider when the size of a solar panel is the size of each meeting and the amount of sunlight within your geographical location.

Although many variables affect solar system output Irradiance (the solar energy) expressed in kWh/m2/day is easily the most significant.

It’s also known as “peak sun-hours” and is utilized for solar installation companies to calculate solar panels array size.

The irradiance can be determined by looking at the database’s historical values like this one. It can be seen on the website Check out the picture below:

Austin, Texas direct normal irradiation
Austin, Texas direct normal irradiation.

The image illustrates the irradiance in Austin, Texas, like 1688 hours of peak sunlight per year. That amounts to 4.62 hours of peak-sun-time every day. We’ll take this figure to calculate our calculations.

Notification: Don’t imagine that you can connect solar panels directly to the Tesla battery to charge them. It’s logical, but that’s not how it works.

The best way to ensure safety is to utilize the inverter and connect it to the normal charger. Of course, some losses come to the inverter, but they will be negligible when it’s correctly sized, i.e., approximately the same as it is for the solar panel in Watts.

Solar power required is 11 kWh (for 60-mile commute)/4.25 sun-day-peak hours equals 2380 Watts.
The number of solar panels needed is 2380/300 equals 7.9 (8) solar panels 300 each watt.

NOTE: In practice, solar power system ratings must be multiplied by 1.44 to account for the costs in a working system.

In this scenario, for 60 miles of commute, thirteen solar panels, each with a rating of 300 watts, are required. This is equivalent to a power capacity that is 3900 watts.

Solar EV charging station cost

An approximate price of the breakdown of the solar power installation is the following:

  • Solar panel array: $10000
  • Solar inverter: $4500
  • Solar Charge Controller: $600
  • Cables and wires $ 400
  • Other costs Other expenses: $300
  • Total cost $ 15800

Can you charge a Tesla with portable solar panels?

I’m a massive lover of portable solar panels. The flexible folding ones are an excellent purchase. I have an 100-watt portable that is highly robust and reliable.

Tesla charge with portable Solar panel

They are great for putting in your car to go camping or other outdoor activities. In addition, it’s great for charging batteries!

If your travels are thin, you could connect the inverter by using one of these devices to recharge your battery when your car is at work, as an example.

As a permanent solution for daily recharges isn’t an option. I prefer a longer-lasting option like installing the fixed panel on the outside of a structure like making the solar pergola where cars are parked frequently at home.

How many solar panels does it take to charge a Tesla overnight?

Solar panels cannot store energy; thus, a battery bank will be required to charge the batteries at night. The capacity of the battery batteries can be calculated by using the amount of discharge from the storm in kWh.

If you are looking at 60 miles of commute time for a Tesla S, this is 11kWh. Tesla S, this is 11kWh.

Energy needed = 11kWh/charging time (say eight hours) = 11000/8 = 1375 Ah
The number of batteries needed is 1375/200 equals 6.87 (7) batteries, each with 200AH

The cost of batteries is around $3000.

What happens if your Tesla runs out of charge?

As you near the end of your battery’s life, you’ll receive a message, “Battery power very low. Heating and cooling reduced.” Then, when you continue going, a second warning will be displayed “Car closing down, stop safely.”

After a short time, there will be an alarm, and your car will go out of power.

Specific models can be towable, while others aren’t, so the best solution is to have the vehicle loaded on an open-bed truck and either drive home or to an electric charging station.

Roadside associations are looking into roadside battery chargers for emergency use for their vehicles. They will likely become more prevalent because the number of electric cars increases.

Technically speaking, it’s not a good idea for batteries to be discharged entirely regardless of the type used in electric automobiles. Instead, the best practice is to discharge up to 80% for a battery’s longevity.

How many solar panels to charge a Tesla Powerwall 2

Tesla Powerwall 2 energy storage is equipped with a capacity of 14 kWh. So let’s say that it’s fully discharged (not typical) and is required to be fully charged with solar.

Utilizing the average US Irradiance measurement of 4 peak-sun-hours and the calculation follows:

Solar energy needed is 14000/4, which equals 3500 Watts (3.5kW)
The number of solar panels = 3500/3 is 11.66 (12) panels, each 300 watts

Notice: To consider solar system losses, the power rating must be multiplied by 1.44. In this instance, the number of solar panels needed will include 17. Each of which is being rated at 300 watts.


The process of calculating the number of solar panels you will need to power the Tesla is quite simple.

You can use these formulas or results to calculate your average mileage and maximum hours of sun in your state.

You’ll save thousands of dollars, and you’ll be riding your Tesla powered by 100% renewable energy.