7.3kW Solar + EG4 FlexBOSS21 + [20.48kWh - 28.6kWh Lithium Battery] + 18 x 410W Solar Panels | Includes Schematic | Complete Solar Kit [BPK-MAX] - ShopSolar.com

Complete Solar Panel Kit - 2,000W Pure Sine Wave Inverter + [12V Battery Bank] + 2 x 200W Mono Solar Panels | Off-Grid, Mobile, Backup [LPK-PLUS] - ShopSolar.com

4.8kW Complete Solar Power System - Sol-Ark 12K + [14.3kWh-15.23kWh Lithium Battery Bank] + 12 x 400W Mono Solar Panels | Includes Schematic [BPK-MAX] - ShopSolar.com

EG4 FlexBOSS 16kw AC Hybrid Inverter | 48V Split Phase | 21kW PV Input | [V1.1] Newest Version - ShopSolar.com

EG4®-LL-S 48V / 100AH Lithium Battery | 5.12kWh Server Rack Battery | 10-Year Warranty - ShopSolar.com

7.3kW Solar + EG4 FlexBOSS21 + [20.48kWh - 28.6kWh Lithium Battery] + 18 x 410W Solar Panels | Includes Schematic | Complete Solar Kit [BPK-MAX]

4 x EG4-LL-S [20.48kWh] / None / Not Needed

4 x EG4-LL-S [20.48kWh] / Ground Mount Rack

4 x EG4-LiFePO4 V2 [20.48kWh] / None / Not Needed

4 x EG4-LiFePO4 V2 [20.48kWh] / Roof Rack

4 x EG4-LiFePO4 V2 [20.48kWh] / Ground Mount Rack

2 x EG4 WallMount Indoor [28.6kWh] / None / Not Needed

2 x EG4 WallMount Indoor [28.6kWh] / Roof Rack

2 x EG4 WallMount Indoor [28.6kWh] / Ground Mount Rack

2 x EG4 PowerPro Outdoor [28.6kWh] / None / Not Needed

2 x EG4 PowerPro Outdoor [28.6kWh] / Roof Rack

2 x EG4 PowerPro Outdoor [28.6kWh] / Ground Mount Rack

4 x Alpha 5 Pro [20.48kWh] / None / Not Needed

4 x Alpha 5 Pro [20.48kWh] / Ground Mount Rack

In Stock Get yours today!

16+ sold In the last 7 days

151.0 Flat Rate Shipping - Calculated at Checkout Get it between Wed, Apr 16 - Fri, Apr 18

Free Returns Free Returns within 30 Days of Purchase

Lifetime Customer Support Unlimited lifetime support, always available.

3000+ Storewide Reviews

Estimated Delivery Time: 5-7 Days

SKU BPK-MAX-1

by BPK

7.3kW Solar + EG4 FlexBOSS21 + [20.48kWh - 28.6kWh Lithium Battery] + 18 x 410W Solar Panels | Includes Schematic | Complete Solar Kit [BPK-MAX]

Name: 7.3kW Solar + EG4 FlexBOSS21 + [20.48kWh - 28.6kWh Lithium Battery] + 18 x 410W Solar Panels | Includes Schematic | Complete Solar Kit [BPK-MAX]
Brand: BPK
Price: 14489.0 USD
Availability: InStock

$14,489.00

$15,999.00

Translation missing: en.product_price.item.price.range_html

$15,999.00

from $14,489.00

$14,489.00

You Saved: $1,510.00 9%

Solar Kit Finder

Need Help? We're Here for You!

If you need help, we're here to assist you whether you're facing issues, have questions, or need clarification.

877-242-2792

Instant Live Chat

Mon-Fri 10am-6pm EST

Battery Bank: 4 x EG4-LL-S [20.48kWh]

4 x EG4-LL-S [20.48kWh]

4 x EG4-LiFePO4 V2 [20.48kWh]

2 x EG4 WallMount Indoor [28.6kWh]

2 x EG4 PowerPro Outdoor [28.6kWh]

4 x Alpha 5 Pro [20.48kWh]

Solar Panel Mounting: None / Not Needed

None / Not Needed

Roof Rack

Ground Mount Rack

Quantity

Request a Free Quote

In Stock Get yours today!

8+ sold In the last 7 days

151.0 Flat Rate Shipping - Calculated at Checkout Get it between Wed, Apr 16 - Fri, Apr 18

Free Returns Free Returns within 30 Days of Purchase

Lifetime Customer Support Unlimited lifetime support, always available.

General Overview

Products Details

Reviews

FAQ's

Why Choose Shop Solar

Powerful, Scalable & Ready for Energy Independence

This 7.2kW Complete Solar Kit is designed to provide reliable, efficient, and expandable power for both on-grid and off-grid applications. Featuring the EG4 FlexBOSS21 Hybrid Inverter, 18 x 410W solar panels, and your choice of a 20.48kWh - 28.6kWh lithium battery bank, this system is built to power homes, cabins, businesses, and mobile setups with ease.

The FlexBOSS21 delivers 16kW continuous output with a 24kW surge capacity, making it powerful enough to handle large household loads—including running a 5-ton AC unit. With 21kW PV input capacity, three MPPT charge controllers, and advanced Wi-Fi monitoring, it provides a smart, seamless energy management experience.

What’s Included in the Kit?

✅ 18 x 410W Solar Panels – High-efficiency panels optimized for maximum energy production - 25-Year Warranty
✅ EG4 FlexBOSS21 Hybrid Inverter – 48V split-phase inverter with remote monitoring, scalable power, and grid/hybrid/off-grid capabilities - 10-Year Warranty
✅ Choice of Lithium Battery Bank (20.48kWh - 28.6kWh) – Select from EG4-LL-S, EG4 LiFePO4 V2, EG4 WallMount, EG4 PowerPro, or Alpha 5 Pro to match your storage needs - 10-Year Warranty
✅ Solar Panel Mounting Solution – Choose between roof or ground-mount racking for easy installation.
✅ All Required Cables, Connectors & Components – Pre-configured for seamless setup.

Why Choose This Kit?

🔹 High PV Input (21kW Capacity) – Allows for future expansion and optimized power production.
🔹 Flexible Power Options – Supports off-grid, grid-tied, and hybrid operation with battery backup.
🔹 Advanced Smart Monitoring – Wi-Fi-enabled control for remote system management and efficiency tracking.
🔹 Scalable & Customizable – Parallel up to 16 inverters for larger power needs.
🔹 Safety & Reliability – UL-certified components with rapid shutdown, arc-fault protection, and ground fault monitoring.

Common Uses:

✔ Home Backup Power – Keep your essential appliances running during grid outages.
✔ Mid-Size Off-Grid Systems – Ideal for cabins, homesteads, and standalone power setups.
✔ Commercial & Business Power Solutions – Reliable energy independence for remote work sites, farms, and mobile applications.

Each kit includes all the cables, connectors, adapters, schematics, guides, and parts needed to get up and running with quiet, free, and reliable solar power—all backed by our lifetime customer support via phone, email, and chat.

💳 Order securely online with major credit cards or PayPal, or take advantage of instant financing at checkout.
📞 Have questions? Call us at 877-242-2792

Embrace the freedom of renewable energy and take control of your power needs today! 🚀

What is your return policy?

Returns are free in the first 30 days with no restocking or processing fees, although the customer may be responsible for paying return shipping. See our complete return policy on our Shipping, Delivery, and Returns page linked in the footer of this website.

What’s covered by your return policy?

Our returns policy covers all purchases made through Shop Solar. For warranty issues, as authorized distributors, we honor the full manufacturer warranty of ALL the brands on our website. See our complete returns and warranty policies on our Shipping, Deliver, and Returns page.

How long will it take to receive my order?

All orders are processed within 72 hours and you can expect delivery on most orders within 5-7 business days. You will receive access to our customer portal after ordering, where it is easy to track all your shipments. See our Shipping, Delivery and Returns page for more details.

What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer
You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

How does your Lifetime Customer Support work?

Our legendary lifetime customer support has helped make us the #1 online solar retailer! We have a dedicated team of solar professionals standing by to help you navigate the world of solar with ease. From selecting the perfect solar kit to installation and beyond, we provide support and expertise at every step of the journey.If you need help with ordering, shipping, troubleshooting, expanding your system, warranty issues, or anything else you have questions about for as long as you own your Shop Solar Kits equipment, we’ve got you covered: we’re always only a phone call or email away.

Top Solar Company in the USA

The prestigious ranking by Consumer Affairs is based on comprehensive evaluations, including ratings and reviews, equipment options, support services, pricing transparency, warranties, and various other factors. Among the top 6 nominated companies, Shop Solar stands out with the highest review rating, reaffirming its dedication to customer satisfaction and product quality.

Best Components, Lowest Prices

We cut out the bloat of traditional solar companies and pass those savings off to you. Plus, we provide free shipping on all solar kits and lifetime customer service on everything we sell.

Expert Guidance

Our team of solar professionals is here to help you navigate the world of solar with ease. From selecting the perfect solar kit to installation and beyond, we provide support and expertise at every step of the journey.

peace-of-mind-1920x1080-c874049a-fa25-466b-a469-5f56a430914e-659x371_krfw.jpg

We’re people just like you

We’re not corporate and neither are our customers. We’re just a group of 50+ solar enthusiasts who are passionate about providing an honest, no-BS way for anyone, anywhere to improve their lives and the world around them with solar power.

Trusted Solar Authority

With over 40,000+ happy customers, 2,500+ positive reviews, and decades of experience in the industry, we’re proud to say we’re America’s #1 solar power solutions provider. You can trust us to provide you with top-notch products and legendary customer service at every step of the way.

Prepare for Anything

From hurricanes to blackouts, reliable solar power ensures you're able to keep your home & family safe no matter what comes your way.

Solar Power Made Easy

Making one-click solar solutions simple since 2018. Whether you’re powering a cabin, charging devices, or backing up your home.

Secure Your Independence

Say goodbye to reliance on the energy companies. Enjoy the same freedom that 50,000+ customers have with their own solar power system.

Solar That Makes Sense - DIY+

Why pay more when you can go solar your way? With our DIY+ model, you become the master of your own solar project - we call it being your own general contractor, using our seasoned technicians to help guide you at every turn. So you can skip the high-commission salespeople and source your own top-tier equipment from us, and if you need a professional installer, we can help with that too. It’s solar, but smarter and more rewarding—because who said going green couldn’t also save you some green?

Solar Power, Your Way - Expert Guidance Included

Become Your Own Solar Contractor with Our DIY+ Program

Save Thousands with Our DIY Solar Kits and Support

Go Green and Save Green with Our Do-It-Yourself Solar Solution

Solar Power, Your Way - Expert Guidance Included

Become Your Own Solar Contractor with Our DIY+ Program

Save Thousands with Our DIY Solar Kits and Support

Go Green and Save Green with Our Do-It-Yourself Solar Solution

Why Choose Shop Solar

What To Expect - Complete Kits

We've been providing America and Canada with complete solar kits since 2018. Our mission is to make solar simple, which is why our complete packages contain every part and piece that you'd ever need. Designed by our expert solar and electrical engineers, we can have the entire kit shipped to your door. All of our kits come with diagrams and videos along with a lifetime of customer support.

Top Solar Company in the USA

Best Components, Lowest Prices

We cut out the bloat of traditional solar companies and pass those savings off to you. Plus, lifetime customer service on everything we sell.

Expert Guidance

We’re people just like you

Trusted Solar Authority

What to Expect - Solar Panels

Get to know the top-tier solar panels included in your kit. These panels are designed to deliver consistent & reliable performance, ensuring your system powers your needs with ease.

What to Expect - Batteries

Learn about the high-quality batteries included in every solar kit, designed to provide reliable energy storage for all your needs. These batteries ensure your system delivers consistent power when you need it most.

Go Solar Now, Pay Later

At ShopSolar you, we offer a wide variety of payment plan options to meet each customer's needs.

Quick and Easy Application

Fill out a short application and we will match you with multiple payment plan options instantly - Survey at checkout!

Poor Credit or No Credit?

Don’t sweat it. We welcome all credit scores and having a credit score is not required for approval.

No Money Down Today

Some payment plans offer as little as no money down, if you qualify.*` - Survey at checkout!

How we compare to the others!

Tired of the costly and complicated traditional solar sales model? At ShopSolar.com, we streamline the process with our digital-first platform, offering one-click complete solar power solutions that save you up to 50%, often including batteries, for true energy independence. Join over 45,000 satisfied customers enjoying affordable solar energy. Start your journey towards saving thousands at ShopSolar.com today!

Local Installer

Other Online Retailers

Best for You Systems

Transparent Pricing

Installation Guidance

Lifetime Customer Support

Customer Success Stories

Troy P

EG4 off-grid base kit, Happy with my purchase.

This is the first stage of my three planned purches. I got the eg4 inverter 6000 XP base kit with six 400 watt panels and the two server rack batteries. Did a little online research and followed the instructions and it got set up without any issues. Right now I'm just running it in my garage on a single outlet and have been running dual 750 watt water distillers with it. Once I get the second inverter and a bunch more panels and batteries, I plan on attaching it to my subpanel in my house that has my lights and outlets and appliances on it. Then I'll get a soft start for my AC and blower and run it on my main panel.

Jacob B

Easy Process, Genuine Support

Trying to pick the correct solar system for your needs can be very technical and frustrating. I wanted to thank Yvhan and the Shop Solar team for their patience and helpful attitudes through multiple calls. I feel like we were able to narrow it down to what worked for me and my family. My system works great and I couldn't be happier to have picked Shop Solar.

Patrick B

Off Grid Solar Purchase

I wanted to get an offgrid solar system for years but didn’t know where to start. I found Shop Solar on Facebook and decided to submit a quote. Within 24 hours I had a custom proposal that was almost half the price of the companies I had previously got quotes from. My wife and I decided to order online and the kit came in a timely manner and it was an easy install. Great company to work with!

James Martin

Highly Recommend

I would like to take the time to express the outstanding service that I was provided with by Shop Solar. They provided me with all the answers to my questions, and after reviewing our quote over the phone I felt comfortable proceeding to order my kit. It’s exactly what I needed and they were there to help us over the phone when we had questions installing it. I highly recommend others in need to choose Shop Solar Kits.

Brian H

Solar Kit for Mobile Work Van

As a professional videographer, I needed reliable power on the go. ShopSolar's Delta Pro and roof-mounted panels were the perfect solution. Setup was easy, and the kit included everything needed. The Delta Pro powers my cameras, lights, laptop, and a small fridge with impressive battery capacity.

Keith S

Best Tech Support

You folks have been wonderful guiding me through the ins and outs of going solar. Plus your tech guys Rod and Nelson are the absolute best. They explained all the different aspects of inverters, batteries and how to keep them in top condition. Too much more to put here… but no other company has the 100% tech support you provide for your customers!

Coll A

Great Experience

My experience with Shop Solar has been excellent. Before the sales, they answered all my questions to assure that I got what I needed. After the sales they continued to support me with answers and help. I had a warranty issue with a unit, and it was handled as well as possible. I would recommend them to anyone looking to go solar.

Troy P

EG4 off-grid base kit, Happy with my purchase.

Jacob B

Easy Process, Genuine Support

Patrick B

Off Grid Solar Purchase

James Martin

Highly Recommend

Brian H

Solar Kit for Mobile Work Van

Keith S

Best Tech Support

Coll A

Great Experience

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Be Smart, Buy From an Authorized Dealer

When you choose us, you’re investing in real products from a trusted company with established supplier relationships. Enjoy peace of mind with 100% manufacturer warranty coverage and lifetime customer support. In an age where online shopping is fraught with risks, it’s crucial to avoid fly-by-night websites that skirt regulations. Shop with confidence, knowing you’re getting genuine quality and reliable service.

Instant Access

Easy to follow videos

Lifetime Updates

SOLAR + STORAGE MINI COURSE

We get it—solar can be confusing, especially if you're diving in for the first time. Which is exactly why we created this short, no-fluff solar mini course. In just 60 minutes, you'll learn everything you need to know to size, install, and optimize your very own solar power system—no confusing jargon or technical overwhelm.
75% OFF TODAY | LIMITED TIME ONLY.

Get Started

ShopGuard

Free Membership Program

Power your lifestyle with ShopGuard Membership. Enjoy lifetime support, extended returns, exclusive rewards, and partner discounts. Join now for unmatched benefits in sustainable living.

30-day extended return period. solarguard cross

14-day price match guarantee after purchase. solarguard cross

Receive notifications about new product launches. solarguard cross

Plus many more amazing benefits!

Applied at Checkout!*

Cart (0 item)

7.3kW Solar + EG4 FlexBOSS21 + [20.48kWh - 28.6kWh Lithium Battery] + 18 x 410W Solar Panels | Includes Schematic | Complete Solar Kit [BPK-MAX]

Powerful, Scalable & Ready for Energy Independence

What’s Included in the Kit?

Why Choose This Kit?

Common Uses:

What is your return policy?

What’s covered by your return policy?

How long will it take to receive my order?

What are your financing and payment options?

How does your Lifetime Customer Support work?

Top Solar Company in the USA

Best Components, Lowest Prices

Expert Guidance

We’re people just like you

Trusted Solar Authority

Prepare for Anything

Solar Power Made Easy

Secure Your Independence

Solar That Makes Sense - DIY+

Solar Power, Your Way - Expert Guidance Included

Become Your Own Solar Contractor with Our DIY+ Program

Save Thousands with Our DIY Solar Kits and Support

Go Green and Save Green with Our Do-It-Yourself Solar Solution

Solar Power, Your Way - Expert Guidance Included

Become Your Own Solar Contractor with Our DIY+ Program

Save Thousands with Our DIY Solar Kits and Support

Go Green and Save Green with Our Do-It-Yourself Solar Solution

Why Choose Shop Solar

What To Expect - Complete Kits

Top Solar Company in the USA

Best Components, Lowest Prices

Expert Guidance

We’re people just like you

Trusted Solar Authority

What to Expect - Solar Panels

What to Expect - Batteries

Go Solar Now, Pay Later

Quick and Easy Application

Poor Credit or No Credit?

No Money Down Today

How we compare to the others!

Customer Success Stories

EG4 off-grid base kit, Happy with my purchase.

Easy Process, Genuine Support

Off Grid Solar Purchase

Highly Recommend

Solar Kit for Mobile Work Van

Best Tech Support

Great Experience

EG4 off-grid base kit, Happy with my purchase.

Easy Process, Genuine Support

Off Grid Solar Purchase

Highly Recommend

Solar Kit for Mobile Work Van

Best Tech Support

Great Experience

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Be Smart, Buy From an Authorized Dealer

SOLAR + STORAGE MINI COURSE

ShopGuard

Get a Complimentary Solar Proposal Today!