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Designed for whole-home backup, the EG4 18kPV hybrid inverter works grid-tied, grid-assist, or fully off-grid. It delivers 12,000W of continuous output with up to 21,000W of recommended solar input.
Planning a system? Read our guide: How to size a battery backup system for your home.
Fits whole-home backup systems, off-grid homes, cabins, workshops, and agricultural buildings where owners want to reduce grid dependence.
*]:pointer-events-auto [content-visibility:auto] supports-[content-visibility:auto]:[contain-intrinsic-size:auto_100lvh] R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]" dir="auto" data-turn-id="request-WEB:c973a675-3fd3-43c9-b019-240bf77326c4-7" data-turn-id-container="request-WEB:c973a675-3fd3-43c9-b019-240bf77326c4-7" data-testid="conversation-turn-16" data-scroll-anchor="false" data-turn="assistant"> Powerful Hybrid Solar Inverter for Whole-Home Backup & Energy Independence The EG4 18kPV Hybrid Inverter combines off-grid capability, whole-home backup power, and grid-tied flexibility into one powerful all-in-one energy solution. Designed to help homeowners take control of their energy usage, this inverter delivers up to 12,000W of continuous output power while supporting up to 21,000W of recommended solar input. Whether you're looking for reliable backup power during outages, lower energy bills, or greater energy independence, the EG4 18kPV is built to deliver dependable long-term performance. Key Benefits All-in-One Hybrid Design – Combines solar power management, battery charging, and inverter functionality into one streamlined system. Whole-Home Backup Capability – Provides powerful 120/240V split-phase output capable of supporting essential household loads and larger home energy systems. High Solar Input Capacity – Supports up to 21,000W of recommended solar input to maximize solar production and energy savings. Works On or Off the Grid – Operates as a grid-tied, grid-assist, or fully off-grid system depending on your energy needs. Expandable System Design – Parallel up to 10 units for larger residential or commercial energy storage systems. Smart Energy Management – Seamlessly manages solar, battery storage, and utility power to help maximize efficiency and backup protection. Remote Monitoring & Control – Monitor system performance, adjust settings, and update firmware remotely using the EG4 app and monitoring platform. Outdoor-Rated Durability – NEMA 4X / IP65 rated for indoor or outdoor installations in a wide range of environments. Battery Compatibility – Supports communication with EG4 48V batteries and select 48V compatible lithium battery brands. Built for Long-Term Reliability – Certified to meet major electrical and safety standards for dependable everyday operation. Use Cases Ideal for whole-home backup systems, off-grid homes, cabins, workshops, RV properties, agricultural buildings, and homeowners looking to reduce grid dependence while maintaining reliable everyday power. Tech Specs Rated Output Power: 12,000W Recommended PV Input: 21,000W Max PV Input Voltage: 600VDC Battery Voltage: 48VDC Output Voltage: 120/240V Split Phase Max Charging Current: 250A Number of MPPTs: 3 Paralleling Capability: Up to 10 Units Enclosure Rating: NEMA 4X / IP65 Communication Options: Wi-Fi, EG4 Monitor Platform Installer Note: If you’ve purchased an EG4 18kPV through, use the customer code “Signature” when setting up the monitoring system. From unboxing to install, we’re with you every step. Reach out to our lifetime, USA-based support team anytime you need guidance.
Warranty terms mentioned in this description are the manufacturer’s. Our own coverage is the 30-day limited warranty.
We confirm compatibility, installation requirements, and delivery details with you during order review, before any payment. Home electrical work may require a qualified installer.
Our team is happy to answer questions about sizing an 18kPV system for your home. Message our team on WhatsApp.
EG4
With 18kW of solar input and up to 12kW of output, the EG4 18kPV hybrid inverter supplies more power than most homes need. It works for fully off-grid systems and grid-tied systems with sell-back.
$3,199.99
EG4
Powerful enough to start a 5-ton AC unit, the EG4 FlexBOSS21 (V 1.1) is a 48V split-phase hybrid inverter/charger. It supports 21kW of PV input across three MPPTs.
$2,879.99
EG4
Off-grid systems cost less with the EG4 FlexBOSS21, which trades a larger transfer switch for more output than the 18kPV. It is an all-in-one 120/240V hybrid inverter for 48V banks with 12kW continuous output, rising to 16kW with solar.
$2,879.99
EG4
Installers and DIY builders get a 48V split-phase hybrid inverter in the EG4 FlexBOSS18. It offers 13kW continuous output with PV, 18kW of solar input, and 10kW battery-only output.
$2,559.99