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

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

    • $15,999.00
    $15,999.00
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    Availability:

    Estimated Arrival: Between May 13 and May 14. *ETA to USA Only

    Shipping & Returns: Get FREE Shipping TODAY!

    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 (21 kW 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 +1 888-562-8850.

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

    FAQ’s

     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 SoleyNergy. 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 SoleyNergy Kits equipment, we’ve got you covered: we’re always only a phone call or email away.

    Order Confirmation:

    As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your credit card for the purchase. As soon as we receive your order, we automatically reach out to our suppliers to confirm that it is in stock and available for immediate shipment. If your item is on backorder or unavailable, we will void the pre-authorization and reach out to you via e-mail. If your item(s) are available for immediate shipment (within 5 business days), we will process the charges and submit the order for shipment.

    Order Shipment:

    If your order is in stock and we process the charges to your credit card, it will ship within five business days from the date of your order. We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out. If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at orders@soleynergy.com.

    Returns:

    We are confident you will be delighted with our products. However, if for any reason you are not satisfied, you have 30 days to return your item. All items must be returned in their original condition and retail packaging within 30 days for a full merchandise refund, not including shipping charges. The customer is responsible for the cost of return shipping.

    To initiate a return, just send an email to returns@soleynergy.com and include the following information:

    • Order #
    • Items you would like to return
    • Reason for your return

    We'll respond to your email within 24 hours, and set up your return or replacement as soon as possible.

    Damages:

    Please inspect the packaging of your item(s) upon arrival. If you notice any damage, make note of it when signing for delivery. If your item(s) arrive damaged, please send photos to returns@soleynergy.com and include the following information so we can process a claim on your behalf:

    • Order #
    • Items that are damaged
    • Images of the damages to packaging or items

    We'll respond to your email within 24 hours and help get you a replacement part or product.

    Cancellations & Refunds:

    All orders canceled after 48 hours are subject to a $20 administration fee, whether or not your order has shipped. If your order has shipped, you (the buyer) will also be responsible for actual return shipping charges. Refunds will only be issued to the original credit card used when placing your order.

    We work very hard to ensure that we offer the absolute best prices online. If you find another online store that offers a lower price then us within six months of your purchase date please let us know and we will refund your original payment for the difference. We want you to feel confident that you are getting the absolute best price for the product you are ordering. If you find that our own website has a lower price for the same item you have ordered within six months of your purchase date will refund the difference as well.

    To request your partial refund simply e-mail us a link to the same product on our website, or on our competitors website within six months from the date of your order and we will process the credit accordingly.

    Our 100% Price Guarantee has some limitations:

    You must purchase the item from our website before requesting your Price Match Guarantee

    Promotions such as rebates and buy one, get one free offers are not eligible

    The item must be in stock on the competitors website

    The competitor must be an online store, they may not have a retail location

    The website can not be a discounter or auction website (ie; eBay, overstock, etc..)

    The competitor must be an Authorized Retailer of the product in question

    The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax

    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 (21 kW 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 +1 888-562-8850.

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

    FAQ’s

     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 SoleyNergy. 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 SoleyNergy Kits equipment, we’ve got you covered: we’re always only a phone call or email away.

    Order Confirmation:

    As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your credit card for the purchase. As soon as we receive your order, we automatically reach out to our suppliers to confirm that it is in stock and available for immediate shipment. If your item is on backorder or unavailable, we will void the pre-authorization and reach out to you via e-mail. If your item(s) are available for immediate shipment (within 5 business days), we will process the charges and submit the order for shipment.

    Order Shipment:

    If your order is stock and we process the charges to your credit card, it will ship within five business days from the date of your order. We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out. If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at orders@soleynergy.com

    Returns:

    Although we are confident that you will be amazed with our Baby Products and related products , if for some reason you are not , you will have 30 days to return your item. All items must be returned in their original condition, and retail packaging with in 30 days for full merchandise refund not including shipping charges. Customer is responsible for the cost of return shipping.

    To initiate a return, just send an email to Returns@soleynergy.com and include the following information:

    • Order #
    • Which items you would like to return
    • Reason for your return

    We'll respond to your email within 24 hours, and set up your return or replacement as soon as possible.

    Damages:

    Please inspect the packaging of your item(s) when they arrive, if you notice any damage you should make note of it when signing for delivery. If your item(s) do arrive damaged, please send photos to returns@soleynergy.com and include the following information so we can process a claim on your behalf:

    • Order #
    • Which items are damaged
    • Images of the damages to packaging or items

    We'll respond to your email within 24 hours and help get you a replacement part or product.

    Cancellations & Refunds:

    All orders canceled after 48 hours are subject to a $20 administration fee, whether or not your order has shipped. If your order has shipped, you (the buyer) will also be responsible for actual return shipping charges. Refunds will only be issued to the original credit card that you use when placing your order.

    We work very hard to ensure that we offer the absolute best prices online. If you find another online store that offers a lower price then us within six months of your purchase date please let us know and we will refund your original payment for the difference. We want you to feel confident that you are getting the absolute best price for the product you are ordering. If you find that our own website has a lower price for the same item you have ordered within six months of your purchase date will refund the difference as well.

    To request your partial refund simply e-mail us a link to the same product on our website, or on our competitors website within six months from the date of your order and we will process the credit accordingly.

    Our 100% Price Guarantee has some limitations:

    You must purchase the item from our website before requesting your Price Match Guarantee

    Promotions such as rebates and buy one, get one free offers are not eligible

    The item must be in stock on the competitors website

    The competitor must be an online store, they may not have a retail location

    The website can not be a discounter or auction website (ie; eBay, overstock, etc..)

    The competitor must be an Authorized Retailer of the product in question

    The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax