EG4 EG4-12000XP 12kW Off-Grid Inverter/Charger

EG4 12000XP — 12kW Split-Phase All-in-One Off-Grid Inverter/Charger

The EG4 12000XP is a high-output all-in-one off-grid inverter/charger built for homeowners and properties that have outgrown entry-level inverter solutions. Delivering 12,000W of continuous split-phase AC output, 24,000W of solar input across four PV inputs, an 18kW surge rating, a 100A bypass, programmable Smart Port, built-in arc fault and rapid shutdown protection, and 2-wire generator auto-start — all in a single wall-mounted enclosure — the 12000XP is one of the most capable and feature-complete off-grid inverters available at its price point. Whether you're powering a large off-grid home, adding whole-home battery backup, or building a resilient energy system from scratch, the 12000XP delivers the output, flexibility, and safety features to do it right.

12,000W Continuous Output with 18kW Surge — Power a Full-Size Home

The 12000XP delivers 12,000W of continuous AC output at 120/240V split-phase — enough to run a large home's full electrical load including central HVAC, electric water heater, well pump, workshop equipment, and EV charging simultaneously. When motor-start loads demand a burst of extra power, the inverter handles peak surges up to 18,000W for 5 seconds, ensuring your heaviest appliances and equipment start cleanly every time without overloading the system.

24kW of Solar Input — Dual MPPT with Four PV String Inputs

Two independent MPPT charge controllers — each with two dedicated PV string inputs for a total of four inputs — accept up to 24,000W of combined solar power across a voltage range of 120–385VDC with up to 35A per MPPT channel. Four PV inputs let you wire multiple roof sections, orientations, or arrays directly into the inverter without a separate combiner box, simplifying the overall system design and reducing hardware costs. Each MPPT independently optimizes its assigned strings for maximum production regardless of what the other channel is doing.

100A Bypass — Full-Load Grid Pass-Through

The 12000XP includes a built-in 100A bypass that allows up to 24,000W of grid power to pass directly through to your loads — covering the full electrical demand of a large home when the grid is available. This integrated bypass eliminates the need for a separate external transfer switch for grid-tied and backup configurations, reducing installation complexity and keeping the system footprint compact.

Programmable Smart Port — AC Coupling or Smart Load Control

A versatile programmable Smart Port gives the 12000XP capabilities that most competing inverters in its class simply don't offer. The Smart Port can be configured as an AC coupling input — allowing an existing grid-tied solar inverter to feed production into the 12000XP system for battery charging and load support — or as a smart load output for programmatic control of non-critical loads based on battery state-of-charge or time-of-day schedules. This single port dramatically expands system design flexibility for both new installations and retrofits.

Generator Port with 2-Wire Auto-Start

A dedicated generator input port accepts up to 90A of generator power for battery charging and load support, with no separate transfer switch required. The 12000XP's built-in 2-wire generator auto-start function automatically signals a compatible generator to start when battery reserves drop below a configurable threshold — and shuts it down again when batteries are sufficiently recharged. This hands-free generator management keeps your system running through extended cloudy periods or high-consumption events without manual intervention.

Arc Fault Protection, Reverse Polarity Protection, and Rapid Shutdown

The 12000XP includes a comprehensive built-in safety stack that most competing all-in-one inverters require add-on hardware to match. Arc fault circuit interrupter (AFCI) protection detects and responds to dangerous arc faults in the PV wiring. Reverse polarity protection guards against wiring errors during installation. Rapid Shutdown (RSD) capability, compliant with NEC 690.12 via an external emergency shutoff switch wired to the primary inverter, meets code requirements for roof-mounted PV systems in jurisdictions requiring rapid shutdown — reducing the need for additional compliant hardware.

Dual Battery Chemistry Support with Closed-Loop Communication

The 12000XP supports both lithium (46.4–60VDC) and lead-acid (38.4–60VDC) 48V battery banks with a maximum charge and discharge current of 250A. Closed-loop BMS communication with EG4's own battery line and a wide range of third-party lithium brands delivers real-time visibility into battery voltage, current, and state-of-charge directly from the battery management system — enabling more precise charge management, longer battery cycle life, and safer operation than open-loop voltage-based charging. Open-loop mode covers any non-communicating battery chemistry including AGM and flooded lead-acid.

UL 1741 and UL 9540 Certified

The 12000XP carries UL 1741 certification covering the inverter itself, and UL 9540 certification for the complete energy storage system when paired with the EG4 WallMount 280Ah Indoor Battery. These certifications satisfy the listing requirements of U.S. authorities having jurisdiction for both solar inverter and battery storage system installations, simplifying permitting and inspection in code-compliant projects.

Wi-Fi Monitoring and EG4 App

Plug-in Wi-Fi connectivity provides real-time remote monitoring and control through the EG4 monitoring app, accessible from any smartphone or browser. Track solar production, battery state-of-charge, grid import/export, load consumption, and system fault codes from anywhere without a site visit. The built-in LCD display on the inverter provides local system visibility for commissioning and field diagnostics.

Scalable to 192kW — Up to 16 Units in Parallel

For larger properties, farms, or light commercial applications requiring output beyond 12kW, up to 16 EG4 12000XP units can be connected in parallel for a combined continuous output of 192kW. Start with one unit sized to current loads and expand in 12kW increments as your energy needs grow — without replacing existing equipment or redesigning the system architecture.

5-Year Warranty

The EG4 12000XP is backed by a 5-year full parts and product replacement warranty from the date of original purchase. Warranty coverage requires registration within the first year of purchase or proof of purchase from an authorized EG4 distributor.