Sunday, November 27, 2022
HomeGreen TechnologyGenerac PWRcell vs. Tesla Powerwall (Which is greatest?)

Generac PWRcell vs. Tesla Powerwall (Which is greatest?)

The Generac PWRcell vs. Tesla Powerwall — two of essentially the most superior battery power storage options (BESS) in the marketplace.

As a potential purchaser, you might wrestle to decide on the appropriate product and specs on your wants. That is solely pure — BESS merchandise are a vital a part of your photo voltaic array, so that you’ll need to make an knowledgeable choice.

For that reason, we chosen two of essentially the most sought-after BESS in the marketplace — the Tesla Powerwall and the Generac PWRcell — and pit them in opposition to one another.


Climatebiz specialists design, analysis, fact-check & edit all work meticulously.

Affiliate Disclaimer

Climatebiz is reader-supported. We could earn an affiliate fee if you purchase by means of hyperlinks on our web site.

Generac Energy Cell Vs. Tesla Powerwall

The Generac PWRcell is an entire photo voltaic battery backup resolution that mixes three foremost elements:

  • A battery cupboard
  • An inverter.
  • An MPPT photo voltaic cost controller known as the PV Hyperlink.

In distinction, the Tesla Powerwall + comes with the next elements:

  • A battery cupboard (The Powerwall).
  • An inverter with 4 MPPT photo voltaic chargers (Tesla Inverter).

The desk under gives a fast comparability between these two BESS.

Specs Tesla Powerwall + Generac PWRcell
Storage Know-how Lithium battery Lithium battery
Sort of battery AC battery – 120/240 VAC DC or AC battery – 360/420 VDC
Effectivity 90% 96.5% (DC) – 90% (AC)
Storage Capability 13.5kWh 9kWh – 18kWh
Steady Energy Output (Off-grid)   7kW 9kW
Steady Energy Output (Grid related)   5.8kW 7.6kW
Peak Energy Output   7.6kW (10s) 9kW (10s)
Enter Photo voltaic Energy   12.9kW 10kW
Scalability   As much as 10 models – 135kWh As much as 2 battery cupboards – 36kWh
Measurement 62.8”x29.7”x6.3” (159×75.5×16 cm) 68″x22”x10″ (173×55.9×25.4cm)
Weight 310lb (140kg) 445lb (202kg)
Guarantee 10 years – 37.80MWh 10 years – 45.36MWh (18kWh mannequin)
Shopping for value (with set up) Powerwall solely – $12’500 Inverter value not launched – estimated $5’000 Battery + inverter – $21’000 (18kWh mannequin)

Attending to know Generac and the PWRcell

Based in 1959, Generac is a well-renowned American firm recognized for its high quality backup mills (gasoline and diesel).

In 2019, to increase its product vary, Generac acquired Pika Power alongside Neurio, an organization that produces power monitoring and optimization software program.

Shortly after, Generac launched the PWRCell — pronounced Energy Cell — a modular battery resolution for photo voltaic power storage and energy outage backup.

The PWRcell

The PWRcell just isn’t solely a battery field; it’s an entire resolution on your house, combining a number of elements to optimize photo voltaic power storage and its use. 

You’ll be able to set up this BESS alongside a brand new system or couple it to an current photo voltaic array.

Let’s briefly evaluation each configurations:

PWRcell coupled to an current system

When coupled to an current photo voltaic system, the PWRCell contains the next:

  • A PWRCell Battery cupboard
  • A PWRCell Inverter
  • A PWRCell ATS (Computerized Switch Swap)
PWRcell coupled to an existing solar system.
PWRcell related to an current photo voltaic system.
Supply: Generac

On this occasion, the PWRcelll is AC coupled. It is because the beforehand put in photo voltaic inverter provides AC to the home. 

The PWRCell inverter and ATS hyperlink as much as the principle panel board. The ATS is a sensible change that permits energy from the present photo voltaic system to provide your property and cost the battery. Nonetheless, this relies on its state of cost and the quantity of energy out there.

An ATS permits the PWRcell to cost by way of grid electrical energy, if obligatory. Nonetheless, this AC-coupled configuration is much less environment friendly than a DC system.

The scheme under reveals that the AC system requires an extra power conversion step, leading to losses.

Normally, AC techniques have a 90% spherical journey effectivity vs. 96% for DC techniques.

AC battery system vs. DC battery system.
AC battery system vs. DC battery system.

PWRcell as a part of a brand new system

As a newly put in photo voltaic system, the PWRcell contains the next:

  • PWRcell battery cupboard
  • PWRcell Inverter
  • PVLink optimizer
  • SnapRS

On this configuration, the PWRcell is DC coupled.

The SnapRS is an in-line fast shutdown machine that may rapidly disconnect a string of photo voltaic modules in an emergency. The photo voltaic panels (as much as 9 models) hyperlink to the PVLink, an in-line photo voltaic charger. 

The PVLink — with its MPPT (Most Energy Level Monitoring) algorithm — optimizes photo voltaic electrical energy manufacturing and sends it to the battery or the inverter for direct use.

Lastly, the inverter converts DC into AC for home use.

PWRcell as a new system.
PWRcell as a brand new system.
Supply: Generac

You need to use the PWRcell as a partial house backup resolution with a sub-panel related to important hundreds.

Attending to know Tesla and the Powerwall

Tesla is the world’s #1 electrical car producer, with nearly 1 million models offered in 2021.

As a significant producer of batteries, Tesla naturally prolonged its product vary to power storage options with the Powerwall launched to the market in 2015.

Tesla Powerwall

As the primary of its sort, the Powerwall is an built-in AC-battery system that shops and provides AC electrical energy inside a home.

Lately, Tesla launched the Powerwall 2 — a more moderen model of the Powerwall — which gives extra energy and storage capability.

Then, in 2022, Tesla launched the Powerwall +, a bundle combining a photo voltaic inverter and the Powerwall.

The Powerwall+.
Supply: Tesla

Observe to our readers: as of 2022, Tesla solely sells the Powerwall with a brand new Tesla photo voltaic system.

Tesla has designed its product to perform as a part of an entire or partial house backup system throughout an influence outage.

Now let’s rapidly evaluation every configuration:

Powerwall as a complete house backup system

The photo voltaic panels produce DC electrical energy on this configuration, which the built-in photo voltaic inverter converts into AC.

You need to use this AC electrical energy in your home or retailer it in your Powerwall’s battery for later use.

As an entire house backup system, the Powerwall+ features a backup gateway that mechanically disconnects your entire system from the grid in case of an influence outage.

Complete backup system.
Supply: Tesla

Powerwall as a partial house backup system

You’ll require a second electrical panel board that connects the backup hundreds to ascertain a partial house backup system of important home equipment with the Powerwall.

Throughout an influence outage, the backup gateway disconnects the system from the grid and the non-essential hundreds. On this occasion, the Powerwall solely provides the backup hundreds.

Backup of important hundreds, supply: Tesla

Which firm produces higher high quality?

To find out which firm produces the higher high quality BESS on this Generac PWRcell vs. Tesla Powerwall comparability, we analyzed the next notable options of every product:

  • Battery and inverter guarantee.
  • Design.
  • Robustness.
  • Power Effectivity.
  • Upkeep.
  • Connectivity.

Each options are wonderful, however in the long run, the Tesla Powerwall pulls forward with a slight benefit. Here’s a abstract of our findings.

Tesla Powerwall Generac PWRcell
Guarantee ++ +
Design ++ ++
Robustness ++ +
Power effectivity + ++
Upkeep + ++
Connectivity ++ +

Generac PWRcell vs. Tesla Powerwall: battery and inverter guarantee

Each corporations provide a 10-year guarantee on their batteries. The Tesla inverter comes with a 12-year guarantee, and the Generac inverter has a 10-year guarantee.

Tesla ensures a complete of 37.80MWh full battery cycles, equal to 2.8MWh per kWh value of battery. Compared, Generac’s 18kWh mannequin ensures a complete of 45.36MWh, equal to 2.52MWh per kWh.

This implies Tesla ensures 10% extra power than Generac over the lifetime of its product.

Fairly surprisingly, Generac doesn’t present details about the retained capability after 10 years. In distinction, Tesla ensures that the Powerwall will function at 70% capability after 10 years.

Winner: Tesla Powerwall

Generac PWRcell vs. Tesla Powerwall: design

The Tesla Powerwall is designed as a single unit with a sealed battery cupboard, whereas the Generac PWRcell adopts a modular design with detachable battery modules of 3kWh every.

One PWRcell cupboard accommodates as much as 6 batteries (from 3kWh to 18kWh). Consequently, the PWRcell is bulkier than the Tesla Powerwall and requires extra space for set up.

Furthermore, the Powerwall+ is a “plug-and-play” resolution with 4 built-in MPPT chargers with as much as 12.9kW of solar energy. In distinction, the PWRcell requires the PVLink to attach every string of photo voltaic panels to the inverter (as much as 10kW).

Winner: Draw

Generac PWRcell vs. Tesla Powerwall: robustness

Each Generac PWRcell and Tesla Powerwall are out of doors rated. The Powerwall operates from –4 to 122°F (–20°C to 50°C), and the PWRCell from 14 TO 122 °F (-10 TO 50 °C). Nonetheless, temperatures under  41°F (5°C) will cut back their efficiency.

The Powerwall works at larger altitudes — 3000m vs. the PWRcell’s 2000m.

Each models adjust to the newest security and seismic requirements for power storage techniques.

Winner: Tesla Powerwall

Generac Energy Cell vs. Tesla Powerwall: power effectivity

The Generac PWRcell is a DC battery, whereas the Tesla Powerwall is an AC battery. Consequently, the Powerwall wants an further conversion step to retailer photo voltaic power (DC).

Ultimately, the effectivity of the PWRcell (if DC coupled) is larger than the Tesla Powerwall: 96.5% vs. 90%.

Winner: Generac PWRcell

Generac Energy Cell vs. Tesla Powerwall: upkeep

Each models require nearly no upkeep. Nonetheless, the Generac PWRcell’s modular design permits you to substitute a faulty battery extra effectively.

Within the case of the Tesla Powerwall, you’d have to vary the entire unit.

Winner Generac PWRcell

Generac Energy Cell vs. Tesla Powerwall: connectivity

Generac develops the PWRview, an power monitoring app that helps you lower your reliance on the grid with day by day power experiences and evaluation.

In distinction, the Tesla app is barely extra superior because it permits you to monitor and management your power system remotely.

Winner: Tesla Powerwall

Generac Energy Cell vs. Tesla Powerwall: which product is cheaper?

A whole 18kWh Generac PWRcell system plus set up will value you $25,000. This bundle contains the next elements:

  • Computerized switch change. 
  • Battery cupboard. 
  • Inverter. 
  • Good power administration module.

A 13.5kHh Powerwall plus set up will value you $11,500. Tesla has but to reveal its inverter’s value from the Powerwall+ bundle, however $5,000 can be a secure estimate. Thus, the Powerwall+ will value you roughly $16,500.

The estimated levelized value of storage (LCOS) for the Powerwall+ is $0.46/kWh, whereas the value for the Generac PWRcell stands at $0.55/kWh.

Subsequently, the Tesla Powerwall is cheaper than the Generac Energy Cell over its lifetime.

Which Product Is Higher For You?

Each merchandise are nice choices for powering your home equipment and storing extra photo voltaic power. What’s extra, each merchandise can run an off-grid home.

We suggest the Tesla Powerwall+ together with Tesla photo voltaic panels for these of you with a brand new photo voltaic system.

Nonetheless, these with an current photo voltaic system and a restricted finances will probably be higher off with a Generac PWRCell. Due to its modular design, you can begin with solely three battery modules (9kWh) that may energy your important home equipment.

Last Ideas

With this Generac Energy Cell Vs. Tesla Powerwall comparability coming to a detailed; let’s evaluation:

  • The brand new Powerwall+ from Tesla fronts up properly in opposition to the Generac PWRCell bundle.
  • Tesla has a slight benefit over Generac with its battery power storage resolution.
  • The Powerwall+ is cheaper, has a greater guarantee, and affords progressive power administration options.
  • That stated, the Generac PWRCell, with its modular battery design, is your most suitable option when you’ve got an current photo voltaic system. 

What’s your tackle these two BESS? Tell us your ideas within the remark part under or by following us on Twitter.



Please enter your comment!
Please enter your name here

Most Popular

Recent Comments