What are the best Tesla Powerwall alternatives?
- Alpha ESS – Smile 5
- Fortress Power eVault
- LGE ESS Home 10
- SONNEN Core
- SIMPLIPHI Access
- Enphase Encharge 10
- LAVO (hydrogen battery)
In 2020 solar energy became the cheapest source of electricity in many countries. Consequently, more people are installing solar panels, self-consumption is developing and consumers are turning into producers of energy (prosumers).
In 2015, Tesla paved the way for energy self-consumption with their Powerwall, the first home energy storage system (ESS). A plug and play solution that stores the energy produced by solar panels into rechargeable Lithium batteries to be used at any time in your home.
But Tesla is not the only company offering ESS. Therefore, we have selected the 7 best Tesla Powerwall alternatives in 2021, regarding their technology and price.
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What is a Tesla Powerwall?
Powerwall is the commercial name used by Tesla company for their domestic energy storage solution, also called an AC battery. It is a wall mounted box that put together:
The Powerwall is able to store AC electricity from a solar inverter and deliver back AC electricity (110V/220V, 60Hz) to your household electric system or to the electricity grid.
Is it a worth buying a Powerwall in 2021?
We do believe that the Powerwall is a smart addition to your home electric system. We see three main advantages to this energy storage solution:
- A reliable source of electricity by acting as a back-up power in case of power outage (13.5kWh)
- Enable solar energy self-consumption for partial or full off-the-grid home.
- Time-based control energy consumption (self-consumption during electricity peak-hours).
When it comes to energy storage, the Levelized Cost of Storage (LCOS) is the most accurate cost estimation of your system. It takes into account the total number of charge/discharge cycle over its lifespan. This value expressed in USD/kWh is used to compare the absolute cost of different energy storage solutions.
For the Tesla Powerwall 2 released in 2016, the upfront cost breaks down as follow:
- 6’500 USD (unit cost)
- 3’500 USD (installation cost)
Total of 10’000 USD upfront cost.
Given a 37.8 MWh guarantee total cycle, the LCOS of the Powerwall 2 is 0.26 USD/kWh.
This is still higher than the average US electricity cost of 0.13 USD/kWh, but already lower than the cost of electricity in Hawaii for example (0.33 USD/kWh).
There are now many alternative solutions to the Tesla Powerwall, let’s have a look at our selection of the 7 best home energy storage systems.
7 best alternatives to Tesla Powerwall in 2021
We have selected 7 great alternatives to the Powerwall: all-in-one solutions, offering high storage capacity, powerful inverters and competitive LCOS.
1 – Alpha ESS – Smile 5
Key features:
- Solar Charger: Two built-in MPPT solar chargers (up to 5kW)
- LFP battery storage: 13.5 kWh of capacity (up to 34.2 kWh with modular batteries)
- DC/AC Inverter: 5 kW pure sine-wave inverter
- Connectivity: 24/7 monitoring via cloud connection
- Life duration: 10 years warranty on the battery performances
- Cost: 7700 USD including installation with a LCOS of 0.16 USD/kWh (10 years).
Alpha ESS is a Chinese company operating worldwide since 2012. They are covering both residential and commercial markets with energy storage solutions based on lithium battery technologies.
Their last home storage solution, the SMILE 5, is a great alternative to the Tesla Powerwall.
Why is it a great alternative to Tesla Powerwall ?
The Smile 5 is cheaper than the Powerwall and with a LCOS of 0.16USD/kWh, it is competitive with the current retail electricity price in the US.
Unlike the Powerwall that requires an additional equipment, it is a real plug and play solution, thanks to the MPPT solar charger. The system is connected and you can monitor it from everywhere. Finally, you can easily add extra batteries with its modular design.
2- Fortress Power eVault 18.5 and Sol-Ark inverter
Key features:
- Highly efficient: 93% efficiency from solar panels to AC power output
- Solar Charger: Can connect up to 16 kW of solar panels, with two MPPT
- LFP battery: 18.5 kWh, scalable to 222 kWh, with a 10 years warranty
- DC/AC Inverter: Up to 12 kW power output, can work as On-Grid, Off-grid and hybrid
- Connectivity: Large colored touch screen on the inverter; cloud monitoring
- Cost: 15’299 USD including installation, LCOS: 0.23USD/kWh (10 years)
Fortress Power is a US company, manufacturing domestic energy storage solutions based on LFP batteries. They are committed to deliver the most advanced product combining high storage capacity and long-life duration.
Their ESS (Energy Storage Solution) combines the large eVault battery (18.5 kWh) and the Sol-Ark inverter (12kW) in a plug and play system.
Why is it a great alternative to Tesla Powerwall ?
The Fortress ESS offers a larger storage capacity than the Tesla Powerwall, therefore, conferring more autonomy to your house. Rated at 12kW, the paired inverter is also more powerful than the Powerwall (5kW). You won’t be limited in your electricity use.
In addition, it comes with a solar inverter, you can directly connect large solar panel array. Finally, its LCOS is slightly lower than the Powerwall, the upfront cost is higher but will pay back over the lifetime of the product.
3- LGE ESS HOME 10 WITH 10KW LI-ION BATTERY STORAGE (LG HB 10H)
Key features:
- LFP battery storage with the RESU 10H: 9.8kWh with 10 years warranty
- Solar charger (ESS Home 10): 3 MPPT, up to 13.5kW of solar power
- DC/AC Inverter: 10kW continuous output power
- Highly efficient: 97% efficiency PV to grid
- Cost: 12’000 USD including installation, LCOS: 0.35 USD/kWh (10 years)
LG chem is a battery manufacturer, specialized in LFP technology. With their ESS Home 10 solar inverter coupled with the RESU10H battery storage, they offer a great alternative to the Powerwall.
Why is it a great alternative to Tesla Powerwall ?
LG Chem offers a well designed product that consists of an inverter/solar charger and a battery storage solution. Although the LCOS is slightly higher than the Powerwall, it offers an all-in-one solution to connect directly your solar panels§. In addition, it has a larger capacity and a more powerful inverter.
4-SONNEN Core – 10kWh
Key features:
- An all-in-one smart solution: combines solar charger, DC/AC smart inverter, and battery storage
- Solar charger: Up to 6kW of solar power
- Inverter: 4.8kW continuous power output
- LFP battery storage: 10 kWh with 10 years warranty.
- Cost: 12’500 USD including installation, LCOS: 0.34 USD/kWh (10 years)
Sonnen is a German company with more than 10 years of experience in the domestic energy storage market. They won multiple awards for their products and already installed more than 60’000 units worldwide.
Let’s have a closer look at their all-in-one ESS: Sonnen Core 10kWh.
Why is it a great alternative to Tesla Powerwall ?
Unlike the Tesla Powerwall that requires an extra DC/AC solar inverter, the Sonnen Core is an all-in-one solution to plug in your solar panel array (6kW). Thanks to the DC mode it also offers a better overall efficiency than the Powerwall. Even though both batteries come with a 10 years warranty, the Sonnen Core is more durable with 58 MWh total energy output. On the other side, the Powerwall only offers 37.8 MWh over its life span.
5- SIMPLIPHI ACCESS 15.2KWH SCHNEIDER – DC COUPLED
Key features:
- Solar charger: Up to 4.8kW of solar power
- Inverter: 6.8kW continuous power output
- LFP battery storage: 15.2 kWh with 10 years warranty.
- High efficiency: 98% round trip efficiency from solar to AC output
- Cost: 21’375 USD including installation, LCOS: 0.38 USD/kWh (10 years)
Simpliphi Power is US based company with 10 years of experience in electricity storage. Simpliphi is committed to fight energy poverty by giving 1% of their annual revenue to improve energy access in poor communities.
They offer an all-in-one solution combining energy storage in lithium batteries and a solar inverter by Schneider (Conext XW Pro).
Why is it a great alternative to Tesla Powerwall?
The Simpliphy Access 15.2 integrates all the equipment to directly connect your solar panel array. It offers more power output than the Tesla Powerwall and a larger storage capacity, with an impressive 98% round trip efficiency.
6- Enphase Encharge 10
Key features:
- Inverter: 12 micro AC inverters with a total of 3.84kW continuous power output
- LFP battery storage: 10 kWh with 10 years warranty.
- Smart: Mobile app-based monitoring and control, fully programmable for time-of-use control
- Cost: 14’000 USD including installation, LCOS: 0.38 USD/kWh (10 years)
Enphase was created in the US in 2006, it is now a global energy technology company, offering inverters and battery storage solutions. Innovation is one of their key value with more than 300 patents on micro inverters.
With the Encharge 10, they offer an all-in-one AC coupled storage solution that compete well with the Tesla Powerwall.
Why is it a great alternative to Tesla Powerwall?
Similar to the Tesla Powerwall the Encharge 10 is an all AC domestic energy storage solution. It benefits from the Enphase micro-inverter technology, efficient and safe. However, unlike the Powerwall, it uses the LFP battery technology which is proven to be safer than the Lithium-cobalt battery from Tesla.
7- LAVO hydrogen battery
Key features:
- Electrolyser and water purifier: produces hydrogen from water
- Hydride hydrogen storage: safe and solid hydrogen storage tank, 40kWh with 20’000 cycles
- Hydrogen fuel cell: converts hydrogen into electricity, 5kW AC power output
- Solar Inverter/Charger: directly plug-in your solar panel array
- LFP buffer battery: 5kWh for immediate energy delivery
- Cost: 28’000 USD including installation, LCOS: 0.13 USD/kWh (15 years)
LAVO is an Australian company that hit the headlines early in 2021 for being the first company to offer an all-in-one energy storage solution based on hydrogen technology.
Why is it a great alternative to Tesla Powerwall ?
The LAVO hydrogen battery is the most advanced energy storage solution. It has a storage capacity 3 times higher than the Powerwall. It is highly durable with 20’000 cycles or 15 years life duration. Consequently, its LCOS is the lowest of all our ESS (0.13 USD/kWh). Finally, it is the cleanest storage solution as hydrogen is directly produced from water.
Final Thoughts
Tesla was the pioneer of domestic Energy Storage Solutions (ESS) with the Powerwall. Since then, dozens of companies offering competitive products have popped-up.
Indeed, we are now living an energy transition from fossil fuels to renewables. Moreover, we are moving from a centralized to a decentralized production of electricity. Thanks to the combination of solar panels and ESS, anyone can become a producer of electricity that could be self-consumed or dispatched in the utility grid with smart energy management systems.
ESS systems are becoming more affordable with the dropping price of LFP batteries. In addition, with the development of hydrogen technologies their energy density and reliability will improve making them an essential addition to every household in the coming years.
Really good informative article. We are a solar and wind company out of Cheyenne, Wyoming. We are often researching new products- this article was great, I sent it out to my crew and we will be discussing all these ESS alternatives to Tesla. Thanks again!
Hi Kevin, we are glad you enjoyed the article! 🙂