EG4 Hybrid Power Kit | 16kW 120/240V Output 48VDC - 48kWh System Bundle
The EG4 Hybrid Power Kit combines a 16 kW EG4 FlexBoss21 Hybrid Inverter with three EG4 All-Weather 314Ah Battery modules to deliver a compact, resilient energy storage and backup solution for indoor or outdoor installations. With 120/240 V split‑phase AC output and a 48 V DC battery link, the kit supports grid‑tied operation and reliable off‑grid capability for homes and small commercial applications. Three 314Ah modules provide a nominal total storage capacity of approximately 48 kWh, enabling extended runtimes and greater self‑consumption of solar energy in varying conditions.
System Specifications
- Inverter: EG4 FlexBoss21 Hybrid Inverter — 16 kW continuous AC output, 120/240 V split‑phase
- Batteries: 3 x EG4 All‑Weather 314Ah, 48V DC per module — total nominal energy ~48 kWh
- Protection/Enclosure: NEMA 4X rated inverter enclosure for indoor/outdoor deployment; robust weather exposure tolerance
- Connectivity: Includes 3 x All‑Weather Conduit Boxes and 2 x All‑Weather Parallel Cable Kits for scalable installations
Safety, Certifications & Health
System components carry UL safety certifications for safe operation in demanding environments. The storage modules include a Battery Management System (BMS) with built‑in monitoring and protection features, while the inverter provides high‑inrush capability, supporting heavy inductive loads such as large air‑conditioning equipment. Certifications include UL9540, UL9540A for the battery assembly, and UL1741 for the inverter.
Installation, Maintenance & Warranty
Professional installation by an EG4‑approved technician is required. The kit is designed for both indoor and outdoor mounting with weather‑resistant enclosures and proper enclosure rating. Maintenance is centered on routine inspection of electrical connections and BMS health; warranty coverage includes all parts exchanges, including the BMS, under a 10‑year Full Parts Replacement or Full Product Replacement prorated policy. Registration within the first year of purchase (or proof of purchase from an EG4 authorized distributor) is required to keep the warranty valid; product resale or installation outside approved vendor channels may void coverage.
What’s Included
- 1 x EG4 FlexBoss21 16kW Inverter
- 3 x EG4 All-Weather 314Ah Batteries
- 3 x EG4 All-Weather Conduit Boxes
- 2 x EG4 All Weather Parallel Cable Kits
EG4 Hybrid Power Kit | 16kW 120/240V Output 48VDC - 48kWh System Bundle | 1 x EG4 FlexBoss21 Hybrid Inverter + 3 x EG4 All-Weather 314Ah Battery
This upgraded combination merges the EG4 FlexBOSS18 Hybrid Inverter with the EG4 WallMount 314Ah All-Weather Battery, creating a resilient powerhouse designed to live indoors or out. By swapping the standard 280Ah battery for the massive 16.1kWh All-Weather 314Ah unit, you gain roughly 12% more energy storage and a system rated to handle extreme environments without breaking a sweat.
The Hybrid Powerhouse: FlexBOSS18
The FlexBOSS18 is the "smart brain" of the operation. It is an all-in-one hybrid inverter that bridges the gap between grid-tied efficiency and off-grid independence.
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Dynamic Output: Delivers 13kW of continuous power when solar is present, and 10kW directly from the battery during outages.
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Massive Solar Support: It can utilize up to 18kW of PV input, allowing you to charge your batteries rapidly even on shorter winter days.
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Professional Grade: Features a NEMA 4X rating for superior protection and an impressive 195A LRA rating, meaning it can kickstart heavy inductive loads like 5-ton AC units or large well pumps.
What's Included
1 x EG4 FlexBoss21 16kW Inverter
3 x EG4 All-Weather 314Ah Battery
3 x EG4 All-Weather Conduit Box
2 x EG4 All Weather Parallel Cable Kit
Product Specifications
EG4 All-Weather 314Ah Battery Product Specifications
EG4 All-Weather 314Ah Battery Spec Sheet
EG4 All-Weather 314Ah Battery Quick Start Guide
EG4 All-Weather 314Ah UL9540 Certificate
EG4 All-Weather 314Ah UL9540A Certificate
EG4 FlexBoss21 Hybrid Inverter Product Specifications
EG4 FlexBoss21 Spec Sheet
EG4 FlexBoss21 UL1741 Certificate
Product Manual
EG4 FlexBoss21 Hybrid Inverter
EG4 FlexBoss21 User Manual
EG4 All-Weather Battery
EG4 All-Weather 314 WallMount Battery
Product Warranty
EG4 Product Warranty
EG4 Electronics offers a 10-year Full Parts Replacement or Full Product Replacement Prorated Warranty from the date of battery (EG4 WallMount Indoor 100Ah*1) purchase.
Your warranty must be registered within the first year of purchase or provide proof of purchase from an EG4 authorized distributor to remain valid. If you choose not to register or cannot provide proof of purchase, your warranty may be invalidated.
This limited warranty is to the original purchaser of the product and is one time transferable only if the product remains installed in the original installation location. All parts exchanges, including BMS, are covered during the warranty period. If a full replacement warranty is needed, the warranty is prorated 1/10th per year after the first year at the current retail pricing. Replacement shipping charges may incur on a case-by-case basis. Outside of the continental US, replacement shipping charges may apply.
Product that is not purchased through an EG4 approved vendor is not covered under this warranty. A list of approved vendors can be found on our website. Reselling or removing the product from the original installation site will void the warranty.
Warranty Exclusions – EG4 Electronics has no obligation under this limited warranty for products subjected to the following conditions (including but not limited to):
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Damages incurred during installation/reinstallation or removal
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Poor workmanship performed by an individual, installer, or a firm
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Damages caused by mishandling the product or inappropriate environmental exposure
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Damages caused by improper maintenance or operating outside the specified operating conditions
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Tampering, altering, and/or disassembly of the product
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Using product in applications other than what the manufacturer intended
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Lightning, fire, flood, earthquake, terrorism, riots, or acts of God
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Any product with a serial number that has been altered, defaced, or removed
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Any unauthorized firmware updates/upgrades/patches
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Failure to update with the most recent firmware version, when known defects/issues are corrected
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Damages incurred from a voltage or current spikes due to open-loop lithium battery communications
EG4 product warranty is a limited warranty – EG4 limits its liability in the event of a product defect to repair or replacement in accordance with the terms of this limited warranty. EG4 is not responsible for any additional or indirect damages that may arise from the malfunctioning of the product. These damages could be incidental or consequential, including without limitation, any liability for the loss of revenue, profits, or time. EG4 shall not be liable for any direct or indirect loss of life, including but not limited to bodily injury, illness, or death arising from the misuse or mishandling of the product, whether caused by negligence or otherwise.
EG4 recommends operating its batteries under the conditions listed in our white paper “SoH, DoD and Round-trip Efficiency Explained” to maintain longer and more efficient battery life.
Product FAQs
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