Y&H 4.2KW On/Off Grid Hybrid Solar Inverter DC24V to AC220V, Built-in 120A MPPT, 6200W 27A PV Input, Battery-Free Operatio,Dual AC Output,Offline Firmware Upgrade, for Home Energy Storage System

TECHNICAL SPECIFICATIONS: Pure sine wave 4.2KW output with built-in 120A MPPT solar charger. Upgraded max PV input current to 27A (from 18A), supporting max 6200W PV array power. MPPT voltage range: 60-450Vdc, max open circuit voltage 500Vdc. Features dual AC load output (main 4200W + secondary 840-2940W), adjustable main load cut-off/return voltage from 20.0-26.0V in 0.1V increments. Supports four charging modes: Utility First, Solar First, Solar & Utility, Solar& Battery. This inverter supports battery-free operation.

UPGRADED PERFORMANCE: New offline firmware upgrade function via COMM port allows software updates. Enhanced 27A PV input current increases solar energy harvesting by 50%. Optimized circuit design eliminates electromagnetic interference, ensuring stable operation of sensitive electronics like smartphones, tablets, and communication equipment without disruption.

ADVANCED LITHIUM BATTERY INTEGRATION: Enhanced LIB-485 communication protocol enables seamless BMS connectivity with automatic parameter synchronization. LCD interface directly displays battery SOC, total voltage, charge/discharge current, cell temperatures, and cycle count. WiFi APP (optional) shows comprehensive lithium battery data in real-time. When batteries reach 100% charge, system automatically reduces grid input current to prevent energy waste.

OPTIMIZED BATTERYLESS PV OPERATION: Revolutionary PV-only mode upgraded with intelligent current limiting technology prevents output voltage collapse, allowing larger loads to run directly from solar power without battery backup. Prevents frequent shutdowns during fluctuating solar conditions and ensures reliable pure sine wave output for all appliances including refrigerators and air conditioners.

SMART DUAL LOAD CONTROL & MULTI-USE: Two independent AC outputs enable priority-based load shedding—critical loads remain powered while secondary circuits disconnect at user-defined voltage thresholds. Ideal for off-grid homes, cabins, emergency backup power, areas with frequent outages, and grid-tie energy savings. Compatible with mains or generator input, cold start function (23V), and comprehensive protection systems.

Description:

The upgraded Y&H Hybrid Solar Inverter offers an all-in-one home power solution with 4.2kW (24V) and 6.2kW (48V) options, featuring advanced battery-free operation for maximum flexibility.It integrates a 120A MPPT solar charger, pure sine wave inverter, and intelligent battery management system to deliver stable, efficient energy conversion.

This upgraded model supports offline firmware updates via the COMM port, an enhanced 27A PV input current on both models (upgraded from 18A/22A), and zero electromagnetic interference, ensuring safe operation of sensitive household electronics such as smartphones, routers, and home appliances.Designed for long-term home use, it is ideal for families planning to gradually expand or upgrade their energy storage systems.

FEATURES:

Pure sine wave solar inverter(on/off Grid)

Dual communication ports for Battery communicationand Wifi communication

High PV input voltage range(60~500VDC)

Smart battery charge design to optimize battery life

Offline upgrade through COMM port

Inverter-lithium battery communication status displaveddirectly on the LCD interface

Add lithium battery information display to the APP

Output power factor 1.0

Inverter can run without battery

Built-in Lithium battery automatic activationBuilt-in MPPT Solar charge

Built-in anti-dust kit for harsh environmentDual output

Maximum PV input current: 27A

In battery-free mode, PV systems deliver a better userexperience when powering loads

WIFI&GPRS available for loS and Android

One-key restoration to factory Settings

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