A store built for DIY builders / prototype startups / university researchers

Trusted by researchers, builders, and innovators

Sandia National Laboratories
Texas Instruments
John Deere
ABB
Princeton University
Imperial College London
Texas A&M
Relativity Space

Featured products

1 6
View all

📬 Get DIY Solar + Battery Tips in Your Inbox

Want behind-the-scenes lessons, product breakdowns, and project updates you won’t find on YouTube?
Join my free newsletter at SolarJoeJoe Substack.

✉️ Subscribe to the Newsletter

Learn more on my YouTube Channel: @SolarJoeJoe

After 15+ years working in solar and battery storage—and building a ton of DIY systems—I'm finally sharing it all in video form. I post weekly videos, so be sure to subscribe!

🔔 Subscribe on YouTube
→ See all my videos

Explore our Customer's DIY Projects

View all
  • Michigan Off-Grid Cabin – DIY Solar + Battery Build

    Michigan Off-Grid Cabin – DIY Solar + Battery B...

    Joseph O'Connor

    Here’s a full breakdown of an off-grid energy system we helped design and troubleshoot for a cabin in Michigan. What started as a solar generator with lead-acid batteries eventually turned...

    Michigan Off-Grid Cabin – DIY Solar + Battery B...

    Joseph O'Connor

    Here’s a full breakdown of an off-grid energy system we helped design and troubleshoot for a cabin in Michigan. What started as a solar generator with lead-acid batteries eventually turned...

  • DIY Battery Pack with Sol-Ark Inverter, Whole Home Backup

    DIY Battery Pack with Sol-Ark Inverter, Whole H...

    Joseph O'Connor

    Project Details: LFP prismatic cells (REPT 280Ah) 16S2P configuration, 51.2V nominal, 560Ah (~28kWh Capacity) Nuvation BMS and custom stack switchgear – view options Compression end plates – view product Custom...

    1 comment

    DIY Battery Pack with Sol-Ark Inverter, Whole H...

    Joseph O'Connor

    Project Details: LFP prismatic cells (REPT 280Ah) 16S2P configuration, 51.2V nominal, 560Ah (~28kWh Capacity) Nuvation BMS and custom stack switchgear – view options Compression end plates – view product Custom...

    1 comment
  • RegenOasis - LAGI 2020 Fly Ranch

    The RegenOasis - LAGI 2020 Fly Ranch Entries

    Joseph O'Connor

    An oasis in the desert, the RegenOasis is a shade structure consisting of 91 solar Photovoltaic (PV) panels that also serves as a rainwater harvesting surface. The structure provides a...

    1 comment

    The RegenOasis - LAGI 2020 Fly Ranch Entries

    Joseph O'Connor

    An oasis in the desert, the RegenOasis is a shade structure consisting of 91 solar Photovoltaic (PV) panels that also serves as a rainwater harvesting surface. The structure provides a...

    1 comment
  • Electric VW Beetle

    Electric VW Beetle

    Joseph O'Connor

    Project in Bellingham, WA Nissan Leaf Gen 2 Modules 22S2P Module configuration 44 P-groups in series for 163V nominal Dilithium Design BMS with a Thunderstruck 180VDC charger

    1 comment

    Electric VW Beetle

    Joseph O'Connor

    Project in Bellingham, WA Nissan Leaf Gen 2 Modules 22S2P Module configuration 44 P-groups in series for 163V nominal Dilithium Design BMS with a Thunderstruck 180VDC charger

    1 comment
1 4
View all

New Additions to the Store

1 6
View all

In Stock Now!

View all

Learn how to build...

• Second Life EV packs
• DIY Power walls
• High Voltage, High Power batteries
• Mobile, RV and marine backup
• Electric bikes, go-karts
• Electric Cars, EV conversions
• Robots, Drones, and RC vehicles

Learn More

Books & Resources

Testimonials for Off Grid Solar Book

"One of the best Solar Energy books of all time!"
- The BookAuthority

"Off Grid Solar is a great starter book for anyone who wants a better understanding of solar energy in general and the potential of "off grid" solar systems specifically."
- Amazon Review

"This is one of the first books on solar that I personally read and it has become required reading for our employees."
-Global Solar Supply

Popular Categories

DIY Battery Pack Hardware & Parts

Ships from Michigan, USA Busbars, compression plates, foam and epoxy dividers, connector...

DIY Battery Pack Hardware & Parts

US Inventory

US Inventory

Battery Cells & Modules

18650 cells, LFP, Sodium-ion, second life modules, and large format prismatics for...

Battery Cells & Modules

Rebuilding Nissan LEAF Batteries

How to Build a Lithium-Ion Battery System for less than $400 per kWh

Learn More

Blog

View all
  • Guide to Choosing the Best Battery Management Systems (BMS) for DIY Energy Storage Projects

    Guide to Choosing the Best Battery Management S...

    Joseph O'Connor

    Battery Management Systems (BMS) are essential components in any DIY energy storage system, offering critical features like cell monitoring, balancing, and protection against overcharge and over-discharge. With so many options...

    Guide to Choosing the Best Battery Management S...

    Joseph O'Connor

    Battery Management Systems (BMS) are essential components in any DIY energy storage system, offering critical features like cell monitoring, balancing, and protection against overcharge and over-discharge. With so many options...

  • 280Ah prismatic cell needs a new Name

    280Ah prismatic cell needs a new Name

    Joseph O'Connor

    🔋 Calling All Battery Professionals — Help Us Rename the 280Ah Prismatic Cell! 🔋 The workhorse of the energy storage world—the so-called 280Ah prismatic cell—is overdue for a new name....

    280Ah prismatic cell needs a new Name

    Joseph O'Connor

    🔋 Calling All Battery Professionals — Help Us Rename the 280Ah Prismatic Cell! 🔋 The workhorse of the energy storage world—the so-called 280Ah prismatic cell—is overdue for a new name....

  • Spotlight on Renu's EV Charging Solutions

    Spotlight on Renu's EV Charging Solutions

    Joseph O'Connor

    At OGSolarStore.com, we're dedicated to advancing sustainable living through innovative technology. We're excited to highlight three standout products from Renu's lineup, designed to make electric vehicle charging more accessible and...

    Spotlight on Renu's EV Charging Solutions

    Joseph O'Connor

    At OGSolarStore.com, we're dedicated to advancing sustainable living through innovative technology. We're excited to highlight three standout products from Renu's lineup, designed to make electric vehicle charging more accessible and...

  • Choosing the Right Fuses for Your Lithium Battery System

    Choosing the Right Fuses for Your Lithium Batte...

    Joseph O'Connor

    When setting up a lithium battery system, one of the most critical decisions you'll make involves choosing the correct fuses.

    Choosing the Right Fuses for Your Lithium Batte...

    Joseph O'Connor

    When setting up a lithium battery system, one of the most critical decisions you'll make involves choosing the correct fuses.

1 4
View all