• Experience
    Energy Independence

    StackRack battery systems provide whole home backup by integrating multiple sources of power generation, including solar, battery, grid & generator. Systems provide real-time monitoring and control for a home's day-to-day energy usage.

Our Approach

One Battery. Different Cabinets. Complete Customization.

Every home uses energy differently. Every installation is unique. We don't believe there is a "one size fits all" battery solution for everyone. 


That's why we created our residential systems to be modular - simple to customize, expand and install. Using just our SR5K-UL battery module(s), you can choose the right battery cabinet(s) for your project.


Our goal is to make it easy to customize the perfect battery solution for your home.  

All-in-One Battery Systems

Discover the ultimate solution for your home's energy needs with our Power Station Pro systems. Designed with solar installers to be an all-in-one, complete battery solution, each Power Station Pro system comes with an inverter, battery cabinet, SR5K-UL battery modules, conduit box and all necessary battery cables and wires for a seamless setup. 
Power Station Pro
Power Station Pro XL
Power Station Pro

Power Station Pro

12 kW Power Output | up to 30 kWh Battery Storage

Power Station Pro XL

Power Station Pro XL

12 kW Power Output | up to 50 kWh Battery Storage

Reduced Installation Time & Cost

The battery cabinet comes pre-assembled with dual-entry side-doors and pre-drilled mounting holes, so you can install the inverter and batteries in minutes. 

Scalable & Expandable

Its easy to start with a smaller battery bank and expand if your energy needs change. Connect cabinets together and parallel up to 64 battery modules.

Saving (Wall) Space

Mount the inverter directly onto the battery cabinet. This gives you more choices on where to place your battery system while avoiding installing equipment on your walls.

Can the Power Station Pro provide whole-home backup?

Yes

The Power Station Pro uses the Luxpower 12K inverter, which offers industry leading 12000W (12kW) continuous power output. It also includes a 200A transfer switch and grid passthrough, so you can backup your entire electrical panel without requiring a sub-panel.

Is the Power Station Pro UL certified?

Yes

The Power Station Pro is certified to the highest safety standards including UL9540A and UL9540.
How long does it take to assemble the Power Station Pro?

less than 1 hour

Once the battery cabinet is properly mounted, the inverter, batteries and wires can be installed in under an hour. 

How do you recommend mounting the Power Station Pro?

Concrete or Generator Pad

The Power Station Pro is outdoor-rated and can be secured to a concrete, a concrete pad or generator pad with 2 ft x 3 ft dimensions.

Can I connect multiple units together?

Yes

Connecting units together is simple with knockouts in the conduit box and along the top cable tray of the cabinet.
How much battery storage is in each unit?

The Power Station Pro can hold up to 6x SR5K-UL battery modules for a total of 30 kWh. 


The Power Station Pro XL can hold up to 10x SR5K=UL battery modules for a total of 50 kWh.

SR5K-UL Battery Module

51.2VDC | 100Ah | 5.12 kWh

The SR5K-UL battery module has a 5 kWh energy capacity designed for daily use. An advanced battery management system (BMS) optimizes and protects the battery, while communicating with other connected batteries and the inverter. Battery modules are designed for plug & play installation with all StackRack battery cabinets and allow for simple expansion of your battery bank at any time.

>15 Year Lifespan

High quality battery cells and components ensure reliable and safe operation day after day for over 15 years. 

Advanced Safety Features

Integrated fire arrestors and Emergency Rapid Shutdown provides additional safety during operation in extreme temperatures and rare hardware failure.

Lithium Iron Phosphate

Safe, non-flammable lithium iron phosphate battery cells are certified to the highest safety standards (UL1973 & UL9540A).

Battery Heaters

Integrated battery heaters safely warms the battery when needed in cold temperatures.

What inverters are compatible with SR5K-UL batteries?

SR5K-UL batteries work with most industry-leading, low voltage (48VDC) inverters.

  • Luxpower
  • Sol-Ark
  • Victron
  • Megarevo
Does the battery include an LCD screen?

Yes

The LCD screen gives you real-time data on charge, voltage, strength of charge (SOC), along with specific battery cell data. The screen also simplifies programming and commissioning, allowing you to choose which communication protocol based on inverter brand.
How many batteries can you connect in parallel?

Yes

The dip switches on the inverter allow you to address up to 64 modules with closed-loop communication. 

Will the battery fit a standard server rack?

Yes

The battery is compatible with all StackRack battery cabinets and will fit standard 19" rack-mount cabinets.

Does the battery include pre-charge resistors?

Yes

Pre-charge resistors are included in each battery.
Where can I find data sheets and other documents?

Under the Resources tab in the menu, choose "Documents"

Battery Cabinets

Designed with Solar Professionals

$58.00 $75.00
Are the battery cabinets outdoor-rated?

Yes

All cabinets are IP55 (NEMA 3R) outdoor-rated. The SR Brackets are meant to be installed indoors and are not outdoor-rated.

Do the cabinets include heating/cooling?

Yes

The battery cabinets include 110VAC temperature-controlled cooling fans. Battery heaters are included in SR5K-UL battery modules, but optional additional heating is available for climates that regularly go below 40F.. 
Can you connect multiple cabinets together?

Yes

Battery cabinets have 2" concentric knockouts along the top to allow conduit connections to other cabinets. 

What inverters can you mount on the cabinet?

The SRB6 and SRB10 allow you to mount a Luxpower 12K or Sol-Ark 15K on the cabinet. The outdoor-rated conduit box is sold separately.

Luxpower Inverters

With connections for grid, solar, battery and a generator, the inverter balances energy sources to keep your home powered. 
Its the "brains" of your battery system.

Why should I choose this inverter?

The Luxpower 12K is ideal if your looking for whole-home backup and/or looking to power your home independent of the utility grid.

Can I connect my existing solar system to this inverter?

Yes

You can connect up to 21 kW (90A) of existing solar without modifying your existing solar system.
Will this inverter run off-grid?

Yes

You don't need a grid connection for this inverter to power your home. If you do connect the grid and an outage (blackout) occurs, then the inverter automatically transfer power to your batteries and keep you home running.
Do I need a sub-panel for whole-home backup?

No

With 200A grid passthrough and transfer switch included, you can connect your main electrical panel to the inverter without requiring a sub-panel. Please check with your city and AHJ to see which types of interconnections are allowed.
Can I connect a generator?

Yes

You can connect up to 21 kW generator (90A). If the generator has two wire autostart feature, then the inverter can automatically turn on/off the generator when needed to power the home and charge batteries.
Why should I choose this inverter?

The Luxpower 8K is ideal if your looking for essential loads backup. 


If you are not concerned about home backup, this inverter can help you save on your electric bill by intelligently using solar and battery energy to reduce your grid energy use.

Can I connect my existing solar system to this inverter?

Yes

You can connect up to 15.6 kW (63A) of existing solar without modifying your existing solar system.
Will this inverter run off-grid?

Yes

You don't need a grid connection for this inverter to operate. If a grid outage occurs, any essential loads will be automatically backed up.
Can I connect a generator?

Yes

You can connect up to 15 kW generator (63A). If the generator has two wire autostart feature, then the inverter can automatically turn on/off the generator when needed to power the home and charge batteries.
Why should I choose this inverter?

The Luxpower SNA 6000 is ideal of home backup and off-grid living.

Why is there a "grid" connection for this off-grid inverter?
The grid connection on the inverter allows you to connect grid power directly to the inverter and it's optional. 

The inverter only uses energy from the grid to power loads and charge batteries if solar and battery power is not enough. 

Unlike the Luxpower 8K and 12K inverters, you cannot sell extra energy back to the grid using this inverter.
Can I connect multiple inverters together for more power?

Yes

You can parallel up to 16 units for a total of 96 kW continuous power output.
Can I connect a generator?

Yes

You can connect the inverter to a stand-by generator. If the generator has two wire autostart feature, then the inverter can automatically turn on/off the generator when needed to power the home and charge batteries.
Is the inverter outdoor-rated?

No

The Luxpower SNA 6000 is IP20 (indoor) rated.

Monitor Your System. 
Anytime. Anywhere.

Remote Monitoring

Monitor your system at any time using the Luxpower mobile app or web portal.

Remote Programming

Adjust settings to customize the performance of your system, or schedule a time for an authorized StackRack installer/distributor to assist you over the phone.

Firmware Updates

Over time, your system keeps getting better with improved performance and new features added.

​Welcome to the Future of Home Energy

The US electric grid is failing. Grid outages (blackouts) are on the rise. Electricity prices are outpacing inflation. The long-term solution for reliable and affordable home energy is breaking free from the grid. That means converting your home into a microgrid - an independent energy system where you generate (solar), store and use your own energy (battery storage). When you're free from the grid, you are free from expensive energy bills, increasing electric rates and unexpected grid outages. 

During the Day

The solar energy you produce powers your home and charges your batteries. When your batteries are fully charged, any extra solar is exported to grid.

at Night

The solar energy you produce powers your home and charges your batteries. When your batteries are fully charged, any extra solar is exported to grid.

California Net Metering (NEM) Overview

What you need to know about NEM 1

"the utility (grid) was your battery"

Under NEM 1, you received a 100% credit for energy you exported. Over 12 months, if your solar system exported the same total energy you used from the grid, then your electric bill was zero.


Home batteries offered no benefit in reducing your electric bill, but could provide home backup during grid outages.

What you need to know about NEM 2

"the grid was still your battery, but now there is time-of-use (TOU) rates and some small fees"

Under NEM 2, you received 90% credit for the energy you export. With TOU, the solar you export is credited at a lesser amount than the energy you use in the evening. However, you could still "zero out" your electric bill by adding more solar and increasing your credits to offset your peak energy costs. 


A small home battery (10-15 kWh) could help you save on your electric bill by eliminating expensive energy used during peak hours (5 to 9 pm). However, it probably easier to just add more solar to your roof and increase your credits.

What you need to know about NEM 3

"the grid is no longer your battery and TOU rates are here to stay"

Under NEM 3, you now receive only a 25% credit for the energy you export and there is now a limitation on how much solar you can put on your roof - eliminating the loophole from NEM 2. With TOU rates, solar doesn't make sense without home batteries.


NEM 3 changed solar in California in a big way, and it made it clear that the long-term solution to expensive electric bills, rising utility rates and unexpected grid outages, is powering your home independent from the grid . With solar and a battery system, you can convert your home into a microgrid - generating, storing and using your own energy.

Why more battery storage helps you save in NEM 3

More battery storage allows for more solar

Solar is great for your home because it is a reliable, clean and cost-effective way to generate energy. Did you know that the average cost per kWh for solar is 1.5 cents? Most homes benefit from adding more solar - helping to reduce energy costs in the summer and winter months when we use more energy to keep our homes comfortable. 


Under NEM 3, you receive only 25% credit for the solar energy you export, so larger solar systems only make sense if you have a larger battery bank to store the energy for later use. 

Avoiding Rising Utility Costs

Under NEM 3, you are required to have a time-of-use (TOU) rate plan. This means energy will cost more when demand is higher in the evenings (peak time) and less during the day when demand is lower (off-peak). However, utility rates are increasing faster than inflation and increases affect both peak and off-peak rates.  


The long-term solution to avoiding increasing electric bills from utility hikes is solar and a large enough battery bank (usually 30-40kWh) designed to reduce both your peak and off-peak energy use. 

More financial benefit from peak sell back and VPP programs

Just as energy costs more during peak times, the utility company will credit more if you export energy back during these times. A larger battery bank allows you to increase your credits by exporting more during these times. 


Virtual Power Plant (VPP) programs are becoming more common in California as ways help support the grid during high demand times. As a VPP customer, the utility will compensate you in exchange for your battery system exporting energy when needed. The bigger your battery bank, the more you can participate. 

​Battery Sizing

Why you need more storage than you may think

We want all customers to have a great battery system that will perform as expected for years and years to come - that means proper battery sizing. With StackRack systems, getting the battery sizing correct from the start isn't as important as other systems since it's simple to add more batteries and cabinets at any time. However, it can be frustrating when you find out months or years later that you need more batteries than you first thought. Here are some important considerations when sizing your battery system and why you may need more batteries. 

Depth of Discharge

If a 5 kWh batteries discharges 80% of its energy (4 kWh), then the depth of discharge (DOD) is 80%. Even though batteries can discharge to 100%, it is not recommended. Deeper discharging (>90%) can damage the battery cells and reduce the battery life. Best practice for daily battery cycling is 80% DOD, so you should you increase your battery bank size by 20% if you want your batteries to last >15 years. 

Natural Capacity Loss Over Time

As batteries charge and discharge, it is natural to gradually lose some storage capacity. For example, SR5K-UL batteries will lose 20% capacity after cycling 6000 times (80% retained capacity after 6000 cycles). Consider adding 20% additional battery storage to account for these natural loses over time.

Energy Demand Expected to Increase

Energy demand in the US is expected to increase over 30% by 2050. A big factor is electric vehicles (EVs). If you plan on adding an EV or additional energy loads to your home in the future, then consider increasing your battery storage to account for it. 

Quickly Sizing Your Home Battery System

A common question we get from homeowners, business owners and installers is how much battery storage does a project need. Here is the quick formula we use to size battery systems.

Peak Shaving (Essential Backup)

If you are looking for a battery system to eliminate the expensive peak times (5 to 8 pm) and/or provide essential home backup, then a simple way to calculate your battery storage is size to take you daily average kWh use (refer to your electric bill) and divide in half. For example, if your average daily use is 30 kWh, then your battery storage size would be 15 kWh. This takes into consideration the factors mentioned in "Why you need more battery storage than you may think", listed above. 

>85% Grid Independence (Partial Off-Grid)

This is our most commonly recommended battery storage size for homeowners. With adequate solar, this battery system size is designed to reduce your annual grid energy by >85%, which drastically reduces electric bills and helps avoid utility rate hikes, while also providing home backup. 


Size the battery storage equal to your daily average kWh use. For example, if your daily average is 30 kWh, which is the US average, than your battery storage size would be 30 kWh. This takes into consideration the factors mentioned in "Why you need more battery storage than you may think", listed above. 

Off-Grid

For off-grid living, it is recommended to size your battery based on 2-3x your average daily use. For example, if your daily average kWh is 30 kWh, then your recommended battery storage size would be 60 to 90 kWh. 

Peak Shaving (Essential Backup)
Partial Off-Grid
Off-Grid
Peak Shaving (Essential Backup)
 Average Home Daily Energy UseRecommended Battery Size 
10 to 20 kWh5 to 10  kWh
20 to 30 kWh 10 to 15  kWh
30 to  40 kWh 15 to 20 kWh
40 to 50 kWh 20 to 25 kWh
50+ kWh 20 to 30 kWh

Estimations are based on data from the U.S. Energy Information Administration.

Partial Off-Grid
 Average Home Daily Energy UseRecommended Battery Size 
10 to 20 kWh10 to 20  kWh
20 to 30 kWh 20 to 30  kWh
30 to  40 kWh 30 to 40 kWh
40 to 50 kWh 40 to 50 kWh
50+ kWh 50+ kWh

Estimations are based on data from the U.S. Energy Information Administration.

Off-Grid
 Average Home Daily Energy UseRecommended Battery Size 
10 to 20 kWh20 to 60 kWh
20 to 30 kWh 40 to 90  kWh
30 to  40 kWh60 to 120 kWh
40 to 50 kWh 80 to 150 kWh
50+ kWh 100 to 200 kWh

Estimations are based on data from the U.S. Energy Information Administration.

Home Loads Energy Chart

Use this chart below to help you better understand how different appliances in your home use energy. The chart can be helpful in getting a more detailed understanding of your average daily use, along with planning for future energy demand.

120V Appliance Energy Ratings
240V Appliance Energy Ratings
120V Appliance Energy Ratings

Microwave

0.12 kWh per 5 min

Refrigerator

150 kWh / month

Lights & Outlets

(​for each room)

0.25 kWh / hour

Dishwasher

1-2 kWh / load

Coffee & Kettle

0.12 kWh / brew

Ceiling Fan

0.05 kWh / hour

Television

0.15 kWh / hour

Computer

0.05 kWh / hour

Internet

0.15 kWh / day

Medical Equipment

0.75 kWh / hour

Garage

0.01 kWh / use

Small Air Conditioner

1.8 kWh/ hour

Gas Furnace

1.5 kWh / hour

Gas Dryer

0.5 kWh / load

Gas Water Heater

3 kWh / day

Washing Machine

2 kWh / load

240V Appliance Energy Ratings

Electric Furnace

10.5 kWh / hour

Electric Dryer

4 kWh / load

Electric Water Heater

15 kWh / day

Electric Oven

2.3 kWh / hour

Small Well Pump

2-3 kWh / day

Large Well Pump

6-8 kWh / day

Medium Air Conditioner

(2-3 Ton)

2 kWh / hour

Large Air Conditioner

(4-6 Ton)

4 kWh / hour

Level 1 EV Charger

1.8 kWh / hour

Level 2 EV Charger

9 kWh / hour

Added to cart
- There was an error adding to cart. Please try again.
Quantity updated
- An error occurred. Please try again later.
Deleted from cart
- Can't delete this product from the cart at the moment. Please try again later.