ESS Battery Type Comparison

Outsmart the Grid

with an Energy Storage System (ESS)

When producing electricity with solar panels, your home uses that electricity first. Extra electricity goes to the grid and is credited at the retail rates with Net Metering, lowering electric bills even when the sun is not out. But with the mandatory time of use rate plans, the most expensive times to use electricity do not always correlate to the times of peak solar generation. With a home battery, store your extra solar electricity from the day to use during the hours when electricity is the most expensive, such as late evenings when the sun has set.

Self-Consumption

Use your solar electricity at night, after the sun has set and your solar system is no longer producing. Reduce your carbon footprint. Avoid using dirty, night-time grid energy and power your life with 100% renewable energy.

 

 

Power, even during a blackout

Continue using electricity, even when the grid goes down. Your battery will power your lights, TV, computer, refrigerator, microwave, and virtually anything you can plug into a standard wall outlet, throughout your home. When the grid goes down, the battery automatically takes over.

Even if the battery depletes at night, your Solar System will begin charging the battery when the sun rises the next day, powering your home for extended blackouts.

The Batteries


Enphase Ensemble


Works With: New and existing Enphase systems with IQ6 microinverters or newer.

Expandable: Multiple Enphase Ensemble batteries can be combined for increased battery capacity.

Power During a Blackout: Yes

Enphase Ensemble is the only single-source Inverter & battery integration between battery and inverter and functions as a single integrated system. This tight integration offers exclusive features, including allowing batteries and inverters to fully coordinate and adjusting production to allow for maximum efficiency.

In addition, Enphase Ensemble batteries are modular, with multiple sizes available. Choose the right combination of batteries to ideally size a battery system.

And like the Tesla Powerwall, Ensphase Ensemble allows you to avoid expensive peak-hour electricity charges and seamlessly switches over to backup power when the grid is down.

 

Tesla Powerwall 2


Works With: Virtually any existing and new solar system.

Expandable: Multiple Tesla Powerwall 2 batteries can be combined for increased battery capacity.

Power During a Blackout: Yes

The Tesla Powerwall 2 is highly flexible and works with most existing solar systems. The Powerwall will charge during the day from extra solar production. During the nights or on cloudy days, your solar system will draw its electricity from the Powerwall, minimizing your usage of the grid and allowing you to avoid expensive peak hour charges.

When the electricity goes out, the Powerwall will seamlessly take over. The switchover is automatic. Simply continue using your electricity.

 

Sonnen


Works With: Virtually any existing and new solar system.

Expandable: Multiple Sonnen batteries can be combined for increased battery capacity.

Power During a Blackout: Yes

Sonnen offers a customized solution that works with virtually any existing solar system, Sonnen has a large number of products with an assortment of features. Like the Tesla Powerwall, Sonnen allows you to avoid expensive peak-hour electricity charges and seamlessly switches over to backup power when the grid is down.

 

LG Chem (SolarEdge StorEdge)


Works With: Existing SolarEdge systems. SolarEdge inverter may need to be upgraded.

Expandable: Multiple LG Chem batteries can be combined for increased battery capacity.

Power During a Blackout: Yes

LG Chem batteries are Direct Current, or DC based, and seamlessly interact with SolarEdge StorEdge inverters. By maintaining electricity in DC, there is no power loss when solar production is stored directly into the battery, maximizing efficiency.

Existing SolarEdge systems may be retrofitted with a StorEdge inverter to become compatible with StorEdge. And like the Tesla Powerwall, the LG Chem with SolarEdge StorEdge allows you to avoid expensive peak-hour electricity charges and seamlessly switches over to backup power when the grid is down.

The Comparison

Power

Enphase

Tesla

Sonnen

LG Chem

Rated Capacity (kWh)

10.08kWh

14.0kWh

10kWh

9.8kWh

Usable Capacity (kWh)

10.08kWh

13.5kWh

9kWh

8.82kWh

Input (Grid Up)  (watts AC)

3,840

5,000

no limit

5,000

Input (Grid Down) (watts AC)

100%

100%

8,000

5,000

Output (Grid Up) (watts AC)

3360

5,000

8,000

5,000

Output (Grid Down) (watts AC)

3840

5,000

8,000

5,000

Interruption Rate

TBD

TBD

30-60 seconds

< 2 seconds

Continuous Power Capacity (kW)

5.5kW

5.5kW

8kW

5kW

Peak Power @ 10 seconds

5,700-watts

7,000-watts

12,000-watts @ 5 secs

7,000-watts

 

Warranty

Enphase

Tesla

Sonnen

LG Chem

Warranty/Cycles

10-years or 4,000 cycles

10-years

10-years or 10,000 cycles

10-years / Cycles unknown

Warranty Coverage

backup | daily cycling

backup | daily cycling

backup | daily cycling | moderate grid services

backup | daily cycling

Type of Warranty

Compensation Scheme

Full Product

Full Product

Compensation Formula

Dimensions

42.13″W x 26.14″ H x 12.56″ D

45.3”W x 25.6 H x 5.75” D

25.625″W x 83.375″ H x 19″ D

29.3″W x 35.7″ H x 8.1″ D

Weight

346 lbs.

251.3 lbs.

543 lbs – 830 lbs.

251.3 lbs.

Functionality

Enphase

Tesla

Sonnen

LG Chem

Additional Battery Modules

Yes – 3.36kWh Modules

No – Additional 13.5kWh Battery(ies)

Yes – 2.5kWh Modules

Max 2 9.8kWh Batteries

Topology

Basic All-in-One | Inverter included / external ATS

All-in-One | Inverter + ATS included

All-in-One | Inverter + ATS included

Battery Box – external inverter | external ATS required

Backup Power: ATS

EnPower

Gateway

120 amps built-in

External

Backup Power: Generator Input

Yes

No

Yes

No

Home Automation Integration (smart breakers | HVAC | lighting | EV)

Alexa

Alexa (add on App)

No

No

Applications Engineering Support for all contractor projects

No

No

Yes

No

Tax Credit

Tax Credit: 26%

Tax Credit: 26%

Tax Credit: 26%

Tax Credit: 26%

Self-Generation Incentive Program

**SGIP Rebate TBD

**SGIP Rebate TBD

**SGIP Rebate TBD

**SGIP Rebate TBD

 

**Self-Generation Incentive Program

Which battery is best?

Choosing the right battery involves a balance of price, the amount of battery storage needed, goals, and whether you are installing a new solar system or adding to an existing one. Our energy consultants will help you choose the right battery to gain true energy independence.

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