Solar EV Charging: Why It Could Be Better For EVs

solar panel and electric vehicle
Estimated Reading Time: 5 minutes

Solar and Electric Vehicles (EVs) — the dynamic duo that has recently been in the constant spotlight. Following the recent uproar of electric vehicles (EVs), we’ll be discussing what makes this pairing so perfect.

Whether you’re a seasoned EV owner or considering making the switch, understanding the impact and advantages of solar EV charging stations will aid you in making informed decisions that benefit both the planet and your wallet.

Can EVs Be Charged At Home?

Absolutely! Installing an EV charger in the comfort of your home provides unmatched convenience to your daily routine. If you’re on the hunt for reliable EV charger installers, we’ve curated a comprehensive all-you-need guide for EV home charging!

How Much Are EV Home Chargers?

Installing an EV home charger is an investment that ranges depending on your specific charging needs. For example, mid-range EV home chargers typically cost between S$1,000 to S$2,500, while models with higher charging capacities can go up to about $4,000. 

Keep in mind, there will likely be additional costs such as cabling that can vary based on the distance between your power source and the EV charger.

Before making the purchase, it would be smart to consult a list of professional EV charger installers to ensure that your charging station fits perfectly with your home setup and charging needs.

Can EVs be charged by Solar?

Yes! By having solar panels at home, you can harness the sun’s energy to generate electricity, which can then be used to power your EV. Not only that, but your vehicle can also be powered by clean and green energy, instead of electricity generated from traditional, “dirty” fossil fuels.

We understand that the initial high cost can be daunting. At GetSolar, we’re committed to making solar energy both accessible and affordable for everyone. which is why we’ve developed a unique model, where you pay $0 upfront for your solar panels.

Curious to know how much you could save by installing solar panels? Use our Solar Simulator to get a free quote now!

How Does Solar Charge EVs?

Here’s a brief rundown of how solar panels convert sunlight into renewable energy that charges your EV. Don’t worry, we’ll skip most of the technical jargon. 😉

  1. It all starts with the Photovoltaic (PV) cells found in solar panels. These cells convert sunlight into direct current electricity.
  2. The direct current (DC) electricity generated by the solar panels is fed into a solar inverter.
  3. Afterward, direct current (DC) electricity is converted into alternating current (AC) electricity. This is the type of electricity that your EV and general household appliances use.
  4. The AC electricity is then routed to your home’s electrical distribution box or DB box for short. 
  5. From here, any household appliance, including an EV charger, can be fed electricity.

If you’re interested in knowing how solar panels work, we’ve got you covered with an in-depth informative article.

The Financial and Environmental Benefits from Solar EV Charging

With solar panel costs plummeting by 89% in recent years, switching to solar has become more affordable than ever. 

Solar Panel costs plummeting by 89% in recent years

If you’re considering an electric vehicle, pairing it with a solar system is a smart move. Here’s why:

Even More Savings!

Charging your EV with solar power makes perfect sense. This ideal pairing not only supports a greener planet but also buffers against the fluctuating costs of fossil fuels associated with petrol vehicles.

Charging with Solar Energy vs Traditional Gasoline ($/kWh)

You may be wondering what the price difference is between charging with solar energy and traditional gasoline. 

Assuming you installed an EV charging station at home, your cost to charge your vehicle would essentially be zero dollars as electricity is generated from the sun. What about public charging stations? Well, our recent guide on EV charging stations in Singapore showed that public charging stations roughly cost S$1/kWh and below. 

Suppose you drive 100 km, and an EV consumes 0.2 kWh/km on average. To put things into perspective, let’s do a brief overview:

Traditional Gasoline Public EV ChargingEV Home Charging
(SP Rates)
Solar EV Home Charging
10 liters1 × S$2.92/liter
0.2 kWh/km × 100 km = 20 kWh

20 kWh × S$1/kWh
0.2 kWh/km × 100 km = 20 kWh

20 kWh × S$0.30/kWh
S$29.20 S$20S$6Free from the sun! 

Without much calculation, it’s clear that EVs are significantly cheaper compared to traditional gasoline vehicles. Even more so, solar-powered home chargers are the obvious choice, making them an extremely cost-effective and environmentally friendly option for powering electric vehicles in Singapore

So, why pay for fuel when the sun is free?

Increased Home Value

For the house flippers, this one’s especially for you! It’s straightforward: homes equipped with solar energy systems are more attractive to buyers, enhancing property value. And not forgetting your EV charging stations, the value of your property increases even more.

Don’t just take it from us! Join our active community on Telegram, where like-minded solar EV owners discuss and share their own tips and advice!

solar kaki telegram group

How Many Solar Panels Will I Need To Charge An EV?

The number of solar panels you need to charge an EV largely depends on the type of solar panels you use. Typically, you’ll need an average of 4-5 solar panels to offset traditional fuel costs for your daily commute. However, imagine the additional savings and benefits you could achieve just by increasing your solar capacity.

By adding more panels, you could power everything from your air conditioner to your refrigerator, further reducing your electricity bills. You’re not only maximising your investment in solar energy but also enhancing your energy independence.

With that in mind, let’s dive into an easy-to-understand calculation of the number of solar panels needed to charge an EV!

Step 1: Determining Your EV’s Energy Efficiency

Find out how many kilowatt-hours (kWh) your EV consumes per kilometre (km). 

Typical EV Consumption: 0.2 kWh/km

Step 2: Calculate Your Daily Energy Usage

Multiply the kWh per km figure by your average daily kilometers traveled. 

For a typical Singaporean commute, let’s assume about 40 kilometers for a round-trip.

Daily Energy Usage: 0.2 kWh/km × 40 km = 8 kWh/day

Step 3: Account for Local Sunlight

Singapore experiences about 4 peak sun hours per day on average. 

Divide your daily kWh requirement by these peak sun hours to estimate the required solar system size in kilowatt peak (kWp).

Required Solar System Size (kWp): 8 kWh/day / 4 hours = 2 kWp

Step 4: Calculating the Number of Solar Panels Needed

Note that the performance of solar panels varies depending on their efficiency and size. For ease of understanding and calculation, we’ll use a panel with a 500Wp rating, which typically represents the average maximum output under ideal conditions.

Divide your daily kWh usage by the solar panel’s kilowatt rating to calculate the number of panels needed.

No. of Panels Required: 2 kWp / 0.5 kW = 4 panels

For a typical daily commute in Singapore, you would require an estimate of 4 solar panels of 500 Watts each to completely cover your EV’s daily energy consumption. 

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