Tesla Vs. Enphase (Which battery should you choose?)

Tesla and Enphase — these two juggernauts are leading the energy storage industry with their products, the Powerwall vs. Encharge.

Gone are the power outages, expensive power bills, and unreliability of the conventional energy system. Now, you can produce and store energy all within the comfort of your own home — Enphase and Tesla are leading the way to your energy independence. 

Solar panels have become increasingly popular among homes, both old and new. Realistically though, the sun doesn’t shine every day, so how do you break your reliance on the electricity grid?

Enter solar batteries!

Both the Tesla Powerwall and Enphase Encharge produce different yet high-quality storage systems. So which one has the leading edge? Which one is best for you?

This article will compare features of the Tesla Powerwall vs. the Enphase Encharge so you can decide which one is best for your home.

Foreword
Climatebiz experts design, research, fact-check & edit all work meticulously.

Affiliate Disclaimer

Climatebiz is reader-supported. We may earn an affiliate commission when you buy through links on our site.

Tesla Vs. Enphase

For simplicity’s sake, we’ll just be comparing the Enphase Encharge 10 and the Tesla Powerwall 2.0. However, it is worth noting that both companies have several battery options.

Let’s kick this off by looking at a comparison of the two products:

SpecificationsTesla Powerwall 2.0Enphase Encharge 10
Price (including installation)10,000 USD14,000 USD 
Efficiency (RTE)90%96%
Depth of Discharge100%100%
Capacity13.5 kWh10.08 kWh
Power Rating5 kW3.84 kW
Warranty10 years10 years (with an additional 5-year warranty available for purchase)
ChemistryLithium-ion batteryLithium iron phosphate
Weather resistance–20°C to 50°C (–4°F to 122°F)-15º C to 55º C (5º F to 131º F)
MountingFloor or wall mountWall mount
Dimensions1150 mm x 753 mm x 147 mm(45.3 in x 29.6 in x 5.75 in)1070 mm x 664 mm x 319 mm (42.13 in x 26.14 in x 12.56 in)
Connection TypeACAC
MonitoringTesla appEnphase app
ScaleableYesYes
Feature comparison table of Tesla Powerwall vs. Enphase Encharge

Note: based on US specifications


Tesla Powerwall

Tesla’s Powerwall can work with existing solar panels from another provider. However, if you choose to purchase this system, you’ll also need to purchase Tesla solar panels.

That is unless you purchase a Powerwall through a Tesla-certified installer. Doing so will help you avoid having to purchase an entire Tesla solar package.


Enphase Encharge

Conversely, you can use the Enphase Encharge with non-Enphase solar panels. However, you’ll only be able to back up your energy as you won’t get the same microgrid capability that comes with an entire Enphase solar energy system.

Related Reading: SunPower Vs. Sunrun: Which should you choose? 


Which Company Produces Better Quality Batteries?

Enphase is well-known for the quality and reliability of its products, while Tesla is a leader in electric technologies and has some of the best engineers in the world.

This begs the question: whose battery is better?

We consider several factors to assess the quality of the two companies’ batteries.


Depth Of Discharge

Depth of discharge is a measure of a battery’s capacity. It tells you how much a battery depletes when you’re using it compared to its full state of charge.

So, when a battery has a 100% depth of discharge, it can use 100% of its capacity. 

Both Tesla and Enphase batteries come with 100% depth of discharge; this speaks to the excellent quality of both batteries.

The Winner

It’s a draw.


Weather Performance

Weather variability is a key concern when looking for a consistent, reliable energy supply from your home battery. 

The Enphase Encharge has a slight edge here; it comes with a feature that detects changes in approaching weather patterns and stores energy accordingly. It can do all of this while still absorbing power. So, for instance, if a storm is approaching, the battery will store enough energy to make it through the weather conditions.

Source: Solar Reviews

The Tesla Powerwall is all-around weather-resistant, making it a good option if you live in an area plagued by extreme weather. It also receives weather information from the National Weather Services and can adapt its charging based on a change in weather patterns.


Safety

Since you’re most likely considering these batteries for your home, it’s essential to factor in safety.

We see a significant difference between the Enphase and Tesla batteries in the makeup of the battery itself.


Makeup Of Each Battery

It’s worth knowing what your solar battery is made up of (without getting too deep into the chemistry side of things) to understand their benefits and drawbacks. 

Lithium-ion solar batteries, such as the Tesla Powerwall, are all-around useful and affordable but have several drawbacks. These batteries are more at risk of thermal runaway (overheating) and thus have a shorter lifespan.

The Enphase Battery is one of the safest on the market. It’s made up of lithium iron phosphate, which is cobalt-free. As such, the risk of a thermal runaway defect is not possible, making for less wear and tear on the battery. Furthermore, it eliminates health and fire risks.

As mentioned above, Enphase batteries are cobalt-free, making them extremely safe and resistant to over-heating. That being said, Tesla has incorporated safety features into the Powerwall that prevent it from overheating.


Environmental Impact

If you opt for renewable solar energy to power your home, chances are you value environmental sustainability. Well, it’s worth noting that some batteries are more environmentally-friendly than others.

The Tesla Powerwall’s lithium-ion batteries use cobalt to assist with charging.

Cobalt is a rare element that is challenging to mine ethically. It’s also toxic to animals and humans. However, Tesla has been very transparent about its approach to sourcing its materials directly from mines, which lets the company monitor quality, and environmental and social impact.

Meanwhile, Enphase has a recycling program for e-waste and batteries of all types. They design long-lasting batteries and select suppliers based on their environmental impact.

Related Reading: SunPower Vs. Tesla (Which brand should you choose?)


Tesla Vs. Enphase: Which Company Is Cheaper?

First, let’s start with a brief history of the two companies to understand their products better. 

Enphase has been the market leader in microinverter technologies for the past decade. Its goal is to provide the most reliable, best-performing residential solar power systems. 

On the other hand, Tesla aims to make the least costly solar system available to the most people possible. That being said, Tesla has increased the price of its Powerwall 2 times in the past 3 years.


The Reason Behind Rising Powerwall Prices

Because of residential energy storage incentives, it’s become rather difficult to get your hands on a Tesla Powerwall. So, to slow demand so that production can keep up, Tesla keeps increasing the price of its Powerwall.

To make matters worse, the Tesla Powerwall is now only available for purchase (through Tesla) with solar panels, which is pretty off-putting from a customer’s perspective.

So while Tesla may be the cheaper option in a side-by-side comparison of the two batteries, you have to factor in the cost of an entire solar package.

A Tesla solar package, including the Powerwall, solar battery supporting hardware, and solar system, comes at an average price of $20,628.

Alternatively, an Enphase Encharge 10 battery will cost between $18,000 and $20,000 (with a full system installation).


Tesla Vs. Enphase: Which Has Better Efficiency?

You may have seen the term “round-trip efficiency” (RTE) in your research. This refers to how effective the battery is with each round of charging.

As you know, the efficiency of the batteries in our phones and computers decreases with every charge. Therefore, when choosing the most efficient battery, you must look for the highest RTE for the longest lifecycle. 

Tesla’s Powerwall has an RTE of 90%, while Enphase Encharge 10 has an RTE of 96%, making the Enphase battery the most efficient choice.


Power Outage Scenario

If you live in an area that experiences frequent power outages, you’ll want to consider the off-grid performance of the two batteries.

Tesla’s Powerwall falls slightly behind Enphase Encharge in this regard. The Powerwall cannot monitor charging during an off-grid event while the Encharge can.

If a power outage occurs while your Powerwall is at full charge, your solar panels will continue to produce energy. If your home isn’t consuming significant energy during this event, the Powerwall will have to shut down for 5 minutes to discharge the excess energy.

Conversely, the Enphase Encharge can regulate solar output, meaning the battery will remain on during an off-grid scenario.

Related Reading: 10 Green Energy Stocks (Worth taking a look at)


Which Company Has Better Product Warranty?

When it comes to warranties, the Tesla Powerwall warranty and Enphase Encharge warranty are pretty similar. Both offer a 10-year warranty. More specially, Enphase’s warranty covers the battery for 10 years or 4,000 cycles, whichever comes first.

Enphase also offers an additional 5-year warranty for an additional cost.

Additionally, both warranties guarantee that the batteries will maintain a 70% capacity to store and use energy during their 10-year warranty periods. 

The one noticeable difference is in the cycling coverage on the Enphase Encharge. Tesla covers the Powerwall for 10 years ‘under normal usage,’ which is one charge per day, or 3,200 cycles. 

Conversely, the Enphase Encharge warranty covers the battery without any terms of usage, giving Enphase a slight lead regarding warranties.

Tesla Powerwall WarrantyEnphase Encharge Warranty
Length10 years10 years
Capacity70%70%
Cycles32004000
Usage conditionNormal usageAny use
Tesla vs. Enphase product warranty

When it comes to customer support, Tesla is world-renowned. Tesla performs over-the-air updates on its products, remote monitoring, and troubleshooting. 

Enphase has also proven to have excellent customer support. They have a remote issue detection system and will even send replacement parts to the user.

Related Reading: LG Energy Solution Vs. Tesla Powerwall (Which battery is best for you?)


Which Company Is Right For You?

Each battery has its benefits, so it’s up to you to prioritize these based on your needs.

Luckily, both companies have online tools to help you make the best decision for you.

Enphase offers the Enphase System Estimator to help you assess which of their battery products suits you best. The estimator allows you to input your energy habits to estimate the size, cost, and savings of an Enphase solar or battery system.

Enphase system estimator.
Source: Enphase

Tesla has a similar tool to help you design your solar and battery system based on your requirements.

Tesla solar system design tool.
Source: Tesla

Final Thoughts

We must admit that both companies have impressive home battery products.

While the Tesla Powerwall and Enphase Encharge are two very different products, they lead the charge in energy solutions; you can’t go wrong with either one.

In this article, we broke down the pros and cons of each energy storage product. Each battery has different benefits, and it is up to you to weigh them based on your needs and location.


Enphase Encharge

The Enphase Encharge is flexible, allowing you to increase the storage size by connecting multiple storage systems. Enphase’s battery is one of the safest, most durable ones out there.

With the Enphase app, you can monitor your energy consumption, solar production, and weather events.

Enphase is also extremely reliable with its unique micro inverters that ensure the battery runs smoothly even if one microinverter fails or during an off-grid event.


Tesla Powerwall

The Tesla Powerwall, on the other hand, is a cheaper option if you want to purchase an entire home energy system.

With the Tesla app, you and Tesla can both monitor the performance of your solar energy system, and update/troubleshoot when necessary.

The Tesla Powerwall is also more compact compared to the Enphase Encharge.

Like Enphase, Tesla’s Powerwall has a Storm Watch feature that anticipates weather changes and prioritizes charging appropriately. 

Based on the information we have outlined, prioritize the benefits of each battery to help you decide which home battery is best for you.

Sydney Neijmeijer

Sydney Neijmeijer

Sydney has a Bachelor’s Degree in Environmental Studies and Geography with a focus on Sustainability and the Environment from the University of Victoria, Canada. Sydney recently started her own environmental consultancy to help organizations understand and reduce their emissions. Previously, Sydney worked for the Government of Canada where she helped create policies and regulations to reduce emissions. She is excited to be writing for Climatebiz and delivering important sustainability-related information in a digestible form.

1 1 vote
Article Rating
Subscribe
Notify of
guest

1 Comment
Oldest
Newest Most Voted
Inline Feedbacks
View all comments
Maff

Not the most readable article, and some factual inaccuracies: power walls will not stop powering your house if they are full during a power outage. They may throttle your solar panels, but your house will still be powered (although the throttling method (freq shifting) may affect some equipments like UPS’s. There is an integration between powerwall and Tesla vehicle charging that is a great option to avoid throttling and wasting solar power. Not keen on Mr Musk’s shenanigans, but facts are facts…

Climatebiz
Logo