Welcome to GM Tech
Welcome to GM Tech
Off‑Grid Solar Power Kit | MPPT Controller + LFP Battery + Off‑Grid Inverter
The Off‑Grid PV Energy Storage System is a fully integrated renewable power solution that combines digital control, stable power supply, and flexible energy storage into a compact all‑in‑one design. Built with fully digital dual closed‑loop control and SPWM technology, the system delivers pure sine wave output for reliable operation of residential, commercial, and mission‑critical loads.
Engineered for broad battery compatibility, it supports lead‑acid, gel, and LiFePO₄ batteries, including automatic lithium battery activation, ensuring seamless deployment across diverse off‑grid environments. With AC/PV priority charging, hybrid charging modes, and integrated controller, inverter, battery, and BMS, the system simplifies installation while maximizing energy utilization.
Designed for uninterruptible power supply and full‑power UPS functionality, it maintains stable operation under harsh environmental conditions through multiple protection mechanisms. This makes it an ideal off‑grid power solution for high‑end villas, remote areas, hospitals, hotels, and other locations requiring dependable, continuous energy.
Item No :
GM-LE5KPayment :
TT/LCProduct Origin :
ChinaCustom Made :
YesShipping Port :
20 daysLead Time :
Shanghai, Nanjing, Ningbo, Guangzhou, Shenzhen, etc.Warranty :
3 yearsPage Overview
This Off‑Grid Solar Storage System integrates solar panels, MPPT controller, lithium battery pack, and off‑grid inverter into a complete energy solution for remote locations without grid access.
Designed for homes, cabins, farms, telecom stations, and backup power, it provides stable AC output, long battery life, and reliable performance in harsh environments.
The system supports 48V battery banks, multiple charging modes, and solar‑first priority, ensuring continuous power even during outages.
Key Features
The Off‑Grid PV Energy Storage System is a fully integrated solar‑plus‑storage solution designed exclusively for LiFePO₄ battery systems, delivering high reliability for residential, commercial, and remote‑area power applications. Equipped with fully digital dual closed‑loop control and SPWM technology, it outputs a clean and stable pure sine wave, ensuring safe operation of sensitive appliances and mission‑critical equipment.
This system integrates the MPPT controller, inverter, lithium battery pack, and BMS into a compact, all-in-one architecture, significantly reducing installation time and wiring complexity for EPC contractors and installers. It features AC/PV priority charging, hybrid charging modes, and intelligent lithium battery activation, ensuring continuous and stable power output.
This system features multi-layered protection and broad environmental adaptability. It can be used as a UPS and is suitable for remote areas without mains power or areas with unstable power supply, providing reliable and uninterrupted power output.
This home off-grid photovoltaic energy storage system integrates the controller, inverter, battery and BMS into one, simplifying the installation process, reducing the footprint, and reducing system complexity and maintenance costs
Read MoreSupports AC bypass and inverter output dual modes, has full-power UPS (uninterruptible power supply) function, and can seamlessly switch to inverter mode when the power grid is interrupted to ensure continuous power supply to critical loads
Read MoreThe power saving mode function can reduce no-load loss and improve the overall energy efficiency of the system. It has complete over-voltage, under-voltage, over-current, short-circuit and over-temperature protection functions
Read MoreSystem Components
MPPT Solar Charge Controller
|
Pure Sine Wave Off‑Grid Inverter
|
LiFePO₄ Battery Pack
|
Battery Management System (BMS)
|
AC/DC Distribution Module
|
Monitoring & Control Interface
|
Technical Specifications
| Model | GM-LE3K | GM-LE5K |
| Mains Input | ||
| Rated Input Voltage（VAC） | 220 | 220 |
| Input Voltage Range (VAC) | (185-280)±2% | |
| Frequency Range (Hz) | 47-55(50)/57-65(60) | |
| Overload Current (A) | 40 | |
| Maximum AC Charging Current | 20 | |
| Battery (internal) | ||
| Battery Type | Lithium battery | |
| Battery Rated Voltage | 48 | |
| Battery Voltage Range | 45-60 | |
| No-load Loss（A） | ＜1 | |
| Rated Energy（KWh） | 5.12 | 10.24 |
| PV Input | ||
| Maximum Input Power (W) | 2800 | 4500 |
| Input Voltage Range (VDC) | 60-145 | |
| Recommended PV String Voltage (V) | 105 | |
| Charging Method | MPPT | |
| MPPT Number | 1 | 1+1 |
| Maximum Photovoltaic Charging Current (A) | 50 | 40+40 |
| AC Output | ||
| Rated Output Power (W) | 3000 | 5000 |
| Maximum Output Power (VA) | 5000 | 8000 |
| Rated Output Voltage (VAC) | 220±5% | |
| Output Frequency Range (Hz) | 50/60±1% | |
| Output Waveform | Pure sine wave | |
| No-load Loss | ＜3%（rated power） | |
| AC voltage Distortion Rate | ＜3%（Linear load） | |
| Peak Efficiency | ＞90% | |
| Overload Protection | 120%, turns off after 1 minute; 150%, turns off after 10 seconds | |
| General Parameters | ||
| Isolation Method | High frequency isolation | |
| Protection Level | IP20 | |
| Cooling Method | Intelligent air cooling | |
| Relative Humidity | 5%-95% (no condensation) | |
| Operating Temperature（℃） | -20~+45 | |
| Altitude（m） | 2000 | |
| Noise（dB） | ＜55 | |
| Display Mode | LCD+LED | |
| Communication | RS485-RTU | |
| Reference Weight | 75 | 120 |
| Reference Size (W*D*H) (mm) | 600*550*720 | 600*550*920 |
Updated June 12, 2026
Application Scenarios
Why Choose This System?
Optimize off-grid performance to ensure high reliability
Integrated design shortens EPC installation time
LiFePO₄ battery ensures safety & long cycle life
Supports multiple charging sources
Ideal for installers, distributors, and rural projects
Learn more about off-grid energy solutions
FAQ
A1:Yes. We support OEM/ODM customization including system configuration, battery capacity, enclosure design, communication interface, and branding, enabling distributors and EPC partners to deliver tailored off‑grid solutions.
A2:This system is designed specifically for lithium iron phosphate batteries and features optimized charging curves, precise battery management system (BMS) communication, and built-in smart activation to ensure safety and reliability in off-grid applications.
A3:Yes. It supports both mains bypass and inverter output modes with seamless UPS‑grade switching to ensure continuous power for critical loads.
A4:The system offers AC/PV priority charging, PV‑only charging, and hybrid charging modes, allowing flexible deployment in remote, unstable‑grid, or fully off‑grid environments.
A5:Yes. The system has comprehensive protection measures and a robust, integrated design, making it highly adaptable to various environments.
A6:It adopts fully digital voltage and current dual closed‑loop control with advanced SPWM technology to output pure sine waves for stable and reliable AC power.
A7:No. The system integrates the controller, inverter, battery, and BMS into a compact all‑in‑one design, significantly reducing installation time and wiring complexity.
Page Summary
This off-grid solar energy storage system is a complete off-grid energy storage solution that integrates solar panels, batteries, and inverters. The system can meet the backup power needs of remote residences, farms, telecommunications stations, and homes.
Please Read On, Stay Posted, Subscribe, And We Welcome You To Tell Us What You Think.
Copyright @ 2026 GM Tech All Rights Reserved. 
Network Supported
Sitemap / Blog / Xml / Privacy Policy
