Tesla Solar Inverter | Does It Offer the Best Price and Performance? - EnviroMom (2023)

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It is no surprise that the top electric vehicle manufacturer in the world is also one of the top renewable energy industries in the US. Fact is, the solar and storage business is a vital aspect of Tesla’s future growth plans.

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When you consider a solar system installation, the inverter is the most sophisticated part of the entire system. That means choosing a quality product is a must.

Elon Musk also has already stated his plans to accelerate the growth of Tesla’s solar and energy storage business in the coming years. So, the launch of the Tesla solar inverter as an integral part of the Tesla home solar system was an expected step from the brand.

What exactly are the features of the Tesla solar inverter and how good is it?

Let us look into the details and find out.

What Is a Solar Inverter?

Perhaps you are not familiar with the concept of a solar inverter.

Not to worry.

In fact, before I started investigating solar panels for my own home, I had zero knowledge of them either.

Tesla Solar Inverter | Does It Offer the Best Price and Performance? - EnviroMom (1)

There are two integral parts of a solar energy system- solar panels and a solar inverter. A storage battery may or may not be a part of the system.

The solar panels capture the solar energy and use the photovoltaic cells to convert it into electricity. However, this is a direct current and most home appliances run on an alternating current.

The solar inverter converts this direct current from the panels into alternating current by passing it through a transformer.

Other than that the inverter also acts as the brain of the entire system. It tracks the solar system’s power production and helps in maximizing the output. The inverter also ensures that the system functions in a safe manner.

Generally, there are 5 different types of solar inverters. The string inverter is the most popular choice for residential systems. They offer good durability and come with a low price tag.

The Tesla Solar Inverter- Features and Performance

Before launching its own inverters, Tesla was using SolarEdge and Delta inverters with its solar installations. The inverter was the only key element of a solar installation package that they were not manufacturing. Now they have a complete energy package to offer to the customers.

Generally, using devices from a single vendor provides better system efficiency and software optimization. With an in-house product, Tesla also gets more control over the supply chain and cost structure of its solar energy packages.

Tesla Solar Inverter | Does It Offer the Best Price and Performance? - EnviroMom (2)

This seems in line with Tesla’s target of providing the cheapest solar energy package for residential users. With every stage of the process- from manufacturing solar cells to the installation of the system- under its umbrella, Tesla will be able to drive the costs down even further.

That said, if you are expecting some groundbreaking innovations from Tesla in this product, you might be disappointed.

In terms of features and performance, the device is on par with the market leaders. Even though Tesla has incorporated some great features there is nothing new about the basic design of this inverter

Note, Tesla already has the Powerwall, which is a battery system that can be integrated with solar panels. The Powerwall comes with a Tesla solar inverter for converting the current.

Main Features

The Tesla solar inverter uses the tried-and-tested string inverter technology.

Basically, the system consists of a mounted inverter box that groups the solar panels into a series circuit or multiple “strings”. Multiple strings are then connected to a single inverter that converts the direct current (DC) into alternating current (AC).

The advantage of the string design is the ease of installation and lower costs. The wiring through the roof is also less complicated and lower connection points make the system safer..

One downside of the string system is the series connectivity. If one of the panels is shaded or damaged, it produces at a lower capacity and affects all the other panels across the string.

Also, panel-level optimization is not possible with this design. Such optimization would have boosted the performance even more.

Tesla offers the inverter in 3.8 kW and 7.6 kW models. The 3.8 kW unit is for smaller solar units and the 7.6 kW is for medium-sized units. However, you can stack multiple inverters together to meet the combined output of larger installations.

Note, Tesla does not offer customized solar power systems. So, you get small, medium and large size systems depending on your energy consumption.

Tesla mentions that the design of the inverter ensures high efficiency and reliability. To ensure that the solar panels deliver the best output, the inverter contains more MPPTs (Maximum Power Point Tracking).

Basically, each solar panel has a Maximum Power Point (MPP), when it delivers the maximum power. The job of the MPPT is to keep the output of the solar always at the MPP. Each string will have an MPPT to ensure the best performance of the panels.

The 7.6 kW unit has 4 MPPTs built into it. This is a unique feature as most inverters in this category come with 2 MPPTs. This also gives you additional flexibility with larger installations- especially while installing a solar roof.

Tesla Solar Inverter | Does It Offer the Best Price and Performance? - EnviroMom (4)

The inverters also have a current rating of 13A. This makes them a good option for pairing up with high capacity solar panels with outputs of 400W to 500W.

Interestingly, Tesla has published only selected data about the inverter on its website. Here are some other features of the inverter that Tesla has mentioned.

  • These inverters can integrate with the Tesla Powerwall and Tesla app.
  • The dimensions of both units are 26 in x 16 in x 6 in and the weight is 52 lbs.
  • The device supports Wi-Fi, Ethernet, and 4G LTE connectivity.
  • Tesla solar inverter CEC efficiency stands at 97.5% at 208 V and 97.5% at 240 V. The 3.8 kW panel has a slightly higher efficiency of 98.0% at 240 V.

In terms of efficiency, the inverters are on par with the competition. However, the best efficiency for solar inverters in the market is 99%, which is provided by SolarEdge.

Other than that the Tesla inverter also has the necessary safety features. These include arc fault protection, ground fault protection, and rapid shutdown in case of an emergency. The unit is also designed as per the North American safety and EMI standards.

The Tesla App

The Tesla solar inverter app or the Tesla app provides a comprehensive view of your solar power system and also helps in real-time system monitoring. All the devices in the system, including the inverter, will be connected to the app.

That way, you get a seamless interface between the performance of the solar panels, inverter operation, and energy storage. The interface is easy to use and it also allows Powerwall owners to customize the system based on the user preferences.

It is well known that Tesla provides periodic updates for its products over WiFi or through the app. So you can expect updates for the inverter software in the future.

Tesla Solar Inverter | Does It Offer the Best Price and Performance? - EnviroMom (5)


Tesla is providing a longer warranty on the inverter than its competitors. The standard warranty in the market is for ten years, but Tesla has extended it to 12.5 years. Still, it is not the highest in the market.

The Tesla solar panels are covered by a 25-year warranty. So the warranty on the Tesla inverter is exactly half of that period.

Keep in mind that the entire Tesla solar system is covered by a comprehensive warranty of 10 years.

That said, Tesla’s customer service has earned some bad reviews in the past years. Perhaps you can take the feedback from existing customers in your area to find out more about the Tesla solar inverter warranty service


Tesla has not marked the exact price of their solar inverters. However, the overall price of their solar systems has not changed.

Since Tesla plans to bring the costs further down, we can be sure that the Tesla solar inverter costs will be competitive.

In general, the prices of the complete Tesla solar systems will vary based on the size and the available tax incentives. In 2021, the average cost of residential solar installations in the US was $3.28 per watt. With Tesla solar, the cost of the smallest option will be around $3.18 per watt, including a Powerwall. Costs for larger units were less.

Tesla Solar Inverter | Does It Offer the Best Price and Performance? - EnviroMom (6)

While Tesla does not offer solar leases, you can opt for a solar loan through the company. Also, Tesla has mentioned that it will match the price of any solar installer who quotes a lower price

Final Thoughts

At this stage, the overall performance data from Tesla inverters is limited. That makes it difficult to comment on the long-term performance of the device and its overall impact on the market.

Should you buy the Tesla solar inverter?

In the end, it all boils down to your preferences.

If you are looking for a cheap and reliable solar option, The Tesla inverter is a good choice. Also, tesla installations have a clean look that makes them stand out from the competition.

However, if you want a customized design and a premium category inverter, there are better options in the market.

The only way to find out if the Tesla inverter is available in your area is to check their website.

Frequently Asked Questions

Tesla Solar Inverter | Does It Offer the Best Price and Performance? - EnviroMom (7)

What inverters does Tesla use for solar?

Before manufacturing their own inverters, Tesla used inverters from third parties like SolarEdge and Delta. Presently, they are manufacturing all components of the solar power system in-house.

How does the Tesla solar inverter work?

Tesla solar inverters work on string technology. Each inverter is connected to a string of solar panels and converts the electricity generated by the panels from DC to AC.

Which solar inverter is best?

In the past few years, solar inverters from brands like Fronius, SMA, and SolarEdge have emerged as the top products in terms of quality and performance.


What inverter does Tesla use for solar? ›

Tesla's new inverter is a maximum power point tracking (MPPT) string inverter with an efficiency rating of 97.5% and a 12.5-year warranty. You can get it in one of two sizes: 3.8 kilowatts (kW) for smaller systems. 7.6 kW for larger systems.

How many watts is a Tesla inverter? ›

Tesla Solar Inverter

The inverter is available in two sizes, 3.8kW and 7.6kW and at present is only being sold in the US.

What is the advantage of Tesla solar panels? ›

Tesla offers low-profile solar panels and are likely cheaper than those from other national companies. Those guaranteed low prices, matched with quality panels, batteries and inverters means Tesla likely offers more solar power for less money than other national players.

How much do Tesla solar inverters cost? ›

How much does it cost? The Tesla Powerwall costs $11,050 in 2022. Qualifies for the 30% Clean Energy Credit (formerly known as the Investment tax credit, or ITC). One of the highest storage capacities among all solar batteries at 13.5 kWh.

How much does a Tesla solar cost? ›

Based on our sample quote, a 7.2 kW Tesla solar system costs $14,471, with an additional $11,500 for one Powerwall. The total system would cost $25,971, or $18,180, after applying the federal tax credit.

How long will a battery last with a 400 watt inverter? ›

12 Volt Battery Chart
InverterDual 8D
50Stereo System80 HRS
10027' Color TV40 HRS
200Computer System20 HRS
7 more rows

How many watts is a good inverter? ›

Volts (120) x Amps = Watts

For example if your DVD player draws 100 watts and your laptop another 100 watts, a minimum 300-watt inverter is recommended. If the item is motor driven, it requires additional start-up (surge) wattage (typically 2-3 times the continuous wattage required) to start the device.

How long do Tesla solar panels last? ›

Your solar panels are guaranteed by their manufacturer to at least 80% of nameplate power capacity for at least 25 years.

Which inverter is best in 2022? ›

Best Solar Inverters Manufacturers in India 2022
  • Sungrow solar inverter.
  • ABB solar inverter.
  • SMA solar inverter.
  • GoodWe solar inverter.
  • Huawei solar inverter.
  • Kaco solar invertebrate.
  • Hitachi solar inverter.
  • Luminous solar inverter.

What is the best inverter for the money? ›

Best Car Power Inverter for 2022
  • Bestek 300-watt Power Inverter. Best power inverter overall. ...
  • Bestek 75-watt Power Inverter. Best portable power inverter. ...
  • SuperOne 150-watt Car Power Inverter. Best compact power inverter. ...
  • Bestek 200-watt Car Power Inverter. Most convenient power inverter. ...
  • Krieger 1,100-watt 12V Power Inverter.
1 Sept 2022

Which type of inverter is best? ›

Best Inverters for home in India in 2022
  • Luminous Zelio+ 1100 Home Pure Sinewave Inverter UPS - Black.
  • Luminous Zolt 1100 Sine Wave Inverter for Home, Office & Shops (Blue)
  • V-Guard Prime 1150 Digital Inverter UPS,white.
  • Luminous 900VA Eco Watt Neo 1050 Square Wave Inverter for Home, Office and Shops(Blue)
2 Nov 2022

Why Tesla solar is so cheap? ›

How are Tesla's solar panels so cheap? Tesla's easy ordering process is one of the reasons they have such low prices. Their brand name recognition also helps a lot. Tesla doesn't have to do a whole lot of work to get people to their website.

Does Tesla solar save money? ›

Solar can greatly reduce your electric bill, but you will often still have a residual bill. The size of your utility bill depends on many factors including local utility rates, the size of your system relative to your energy needs and what time of day you use energy.

Is Tesla the best option for solar? ›

Overall, Tesla offers industry-standard solar systems in terms of efficiency and cost. The Tesla solar shingles and roof have a sleek approach to design, and the company provides a solid guarantee for its work. In addition, the Tesla Powerwall is one of the most reputable solar batteries on the market.

How much is Tesla solar a month? ›

Tesla launches solar rental service, can get a solar panel system for $50 per month
StateMonthly Rental (Small)Net
New Jersey$50$20-$180
2 more rows
16 Aug 2019

How much does a Tesla replacement battery cost? ›

However, battery costs could change depending on your car's model. Remanufactured packs cost between $9,000-$10,000, but brand-new batteries might cost up to $22,500. Depending on the process's complexity, the average cost to replace a damaged battery pack with a remanufactured one would be between $13,000-$17,000.

Do you have to pay monthly for Tesla solar panels? ›

Tesla Financing enables you to purchase your solar energy system without paying all costs upfront. When you place an order, you can see your estimated purchase price, broken down into a down payment and estimated monthly payments based on your selected system details.

Why is my Tesla solar bill so high? ›

You may notice a higher bill in the summer when your solar system is producing the most energy. This energy is typically applied as a credit by your utility for usage later in the year. Tesla no longer provides this financing offering for new systems.

How many Tesla solar panels do I need to power my house? ›

The average American home needs between 16 and 20 solar panels based on the average electricity usage of 893 kilowatt-hours (kWh) per month. Installing that many solar panels would cost between $12,000 and $17,000 after the federal solar tax credit.

How long do Tesla batteries last? ›

According to Elon Musk on Twitter, Tesla car batteries are supposed to technically last for 300,000 to 500,000 miles, which is 1,500 battery cycles. That's between 22 and 37 years for the average car driver, who, according to the Department of Transportation, drives about 13,500 miles per year.

Is it OK to leave inverter on all the time? ›

Should the inverter be on all the time? Yes, you should keep your inverter ON all the time. Otherwise, you will lose your battery backup time due to the self-discharge of batteries. You will need to start the inverter manually every time when grid power failed.

How many batteries do I need for 400 watts? ›

How Many Batteries Do I Need for a 400-Watt Solar System? As long as your battery bank can store at least 200Ah (amp hours), you could utilize anywhere from one to four batteries.

Is it better to oversize an inverter? ›

This results in loss of energy. Oversizing the inverter also causes the inverter to operate at high power for longer periods, thus affecting its lifetime. Operating at higher power also increases inverter heating and may heat its surroundings. Inverters will reduce their peak power generation in case of overheating2.

What size inverter will run a house? ›

The capacity of the inverter here means that the maximum power limit demand to which it can operate and provide electricity. Ideally, inverters between 756-1000 W are best suited for homes.

Will a 500 watt inverter run a TV? ›

This little inverter will provide about 4.0 amps of 120 volt power. This can run things like a small TV and a small satellite receiver, charge a laptop and 2 phones at once.

What size inverter is best? ›

You can easily estimate the size inverter you'll need by adding up the largest number of watts you'll be using at a given time and adding 20%. For example, let's say you need 1,500 watts to run your computer and microwave at the same time. Take 1,500 + 300 (which is 20% of 1,500) = 1,800 watts.

Do Tesla solar panels work at night? ›

At night, the solar system will turn off and your home will be powered by the electric grid. During this time, your electric utility's meter will record how much energy your home is using, as it does today.

What are the 2 main disadvantages to solar energy? ›

Solar Cons
  • Standard home solar does not “work” at night.
  • Home solar panels are not attractive.
  • DIY solar installation is difficult (if not impossible) for most homeowners.
  • Not every roof configuration is ideal for maximum solar power generation.
  • Solar manufacturing is not good for the environment.

Which inverter battery has long life? ›

Tubular batteries are the most popular and efficient inverter batteries. They are built with a more sophisticated design, have longer operational life (8+ years) and require little maintenance.

What is the most popular inverter? ›

Top 10 inverters (selected) on the EnergySage Marketplace, nationwide
3SE7600A-US [240V]String inverter
6 more rows
20 Apr 2022

Is 5kW inverter enough to run a house? ›

For homes and very small businesses, such as a sole trader, a 5kW system may be a smart choice. With 5kW solar panels, you'll have enough power to cover most of your home or business's energy usage, making this a perfect starter system for most residential applications.

How long do solar inverters last? ›

The solar inverters on panels usually last between 10-12 years and typically need replacing at least once over the panel's lifetime. The power inverters are crucial for safe and efficient operation of solar panels. Extending the lifetime can have significant advantages to the cost and function of a solar system.

How many hours does inverter last? ›

In general, you can expect your inverter battery to last anywhere around 5 to 10 hours when it is fully charged.

Does Tesla solar increase home value? ›

Does solar add value to a home? Absolutely. Tesla Solar Roofs, in particular, are a great choice for energy-efficient savings, a lower carbon footprint, and a beautiful modern look. Installing one also increases the value of your property.

How much does Tesla solar increase home value? ›

The increase may not happen immediately. It depends on how quickly the tax assessors get around to reviewing your property value and adjusting your tax rate. We've found that adding a Tesla Solar Roof, on average, increases a property value by 11%.

What brand solar panels does Tesla use? ›

In January 2019, Tesla seemed to be using mainly their own Tesla-branded solar panels made by Panasonic in quotes for installations. In a 2018 report by Electrek, it was revealed that Tesla's deal with Panasonic to produce panels at Gigafactory 2 finally began to ramp up significantly.

Do solar panels increase bills? ›

You won't notice any difference in your electricity supply. You can use your solar panels alongside a normal energy tariff, and there's no need to tell your energy company. You'll just use less electricity from the Grid, and therefore pay lower bills.

Why are my solar panels not saving me money? ›

Your Home Is Using Too Much Power

If your solar panels are not reducing your bill, it can be because: Your system is generating less electricity than you use. You're using too much electricity at night when panels aren't generating it. Too many appliances or devices are plugged in.

Does a Tesla raise your electric bill? ›

Across all Tesla products, the average charging cost per mile is 4.56 cents per mile. So, if you only charge your Tesla at home, you can expect your electricity bill to increase by about $50 each month.

What type of inverter does Tesla use? ›

Tesla's new inverter is a maximum power point tracking (MPPT) string inverter with an efficiency rating of 97.5% and a 12.5-year warranty. You can get it in one of two sizes: 3.8 kilowatts (kW) for smaller systems. 7.6 kW for larger systems.

Are Tesla solar panels better than LG? ›

The Tesla Powerwall has a slight upper-hand when it comes to warranty. While LG offers the same 10-year warranty, it only guarantees 60% capacity during that time. This means homeowners who install the LG Chem RESU would expect 10% more degradation of their battery over the same 10-year period.

How many watts are Tesla solar panels? ›

Frequently Asked Questions About Tesla Solar Panels

Tesla solar panels are 425 watts.

What inverter does Tesla Powerwall use? ›

System Components

Powerwall+: Powerwall+ is a rechargeable home battery which includes an integrated Tesla Solar Inverter and a system controller. Tesla Solar Inverter converts energy from the home's solar panels or Solar Roof to be used by the home.

Does Tesla use micro inverters or string inverters? ›

The Tesla inverter is a standard string inverter technology: it consists of a central inverter box installed on your wall with multiple 'strings' of solar panels connected to the same central inverter.

What solar system does Tesla use? ›

Historically, Tesla used Hanwha Qcells' Peak Duo Black solar panels, more specifically the Q. Peak Duo Blk-G6+ modules for their solar panel installations. In 2021, however, Tesla announced that they were switching over to their own solar panels.

Does Tesla make its own inverters? ›

Tesla Solar Inverter offers improved aesthetics, reliability and native integration with the Tesla ecosystem for both Solar Roof and solar panel systems. DC power coming from solar modules is inverted to AC power by Tesla Solar Inverter for home consumption.

How long will a Tesla Powerwall power a refrigerator? ›

For example, it'll power a 200 W refrigerator for 67.5 hours.

How long will a Tesla Powerwall keep my electricity on? ›

If you have one Powerwall installed (without solar) and you're home is using 1 kW, you would be able to run your home for 13.5 hours. We can use this as a baseline to determine how long your system might last during an outage (if your batteries were full when the outage started).

How much does a Tesla Powerwall cost? ›

The price is calculated based on how many units you order: a single Powerwall sells for $10,500, but two units will cost $17,000 ($8,500 each). They can be purchased directly from Tesla, but you can also get them from third-party providers and solar installers local to your area.

How long does Tesla solar panels last? ›

Your solar panels are guaranteed by their manufacturer to at least 80% of nameplate power capacity for at least 25 years.

Where are Tesla inverters manufactured? ›

Tesla, founded in 2003, is a solar inverter manufacturer based in Palo Alto.

What type of inverter is most efficient? ›

High quality sine wave inverters are rated at 90-95% efficiency. Lower quality modified sine wave inverters are less efficient - 75-85%. High frequency inverters are usually more efficient than low-frequency. Inverter efficiency depends on inverter load.

How powerful are Tesla solar panels? ›

Tesla S series solar panels have an efficiency of 19.3% to 19.8% while the H series panels have an efficiency between 20.1% to 20.6% which is mostly on par with other solar panel companies. Competitors ADT Solar and SunPower can claim efficiency of 20% or more.

Can I use my Tesla as a battery for my house? ›

Tesla hacker Green found the relevant section on Tesla's warranty: Tesla's warranty states that you can't use your vehicle “as a stationary power source.”

Can I power my home with Tesla battery? ›

EVs all have batteries large enough to theoretically power a home for several days. The trick is transferring the electrical energy from an EV into useful home AC power.

Can you power your house with a Tesla? ›

The Tesla Powerwall has the ability to keep your home's power running without interruptions during an outage. As soon as an outage is detected, it is able to turn on backup power, so, unlike a generator, you may not even notice the power went out.

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