12kW 48V Parallel Off Grid Solar Inverter

The 12kW 48V Parallel Off Grid Solar Inverter (Model GPEO-12KL1) is a flagship hybrid inverter designed for high-end off-grid applications and commercial/industrial energy storage. It delivers a 12kW single-unit output with a peak efficiency of up to 99.9%. It supports the parallel connection of 12 single-phase units (totaling 144kW) or the configuration of a 380V three-phase system using three or more units (up to 48kW per phase).

Its dual-channel MPPT design (27A per channel) is compatible with various PV modules. Combined with an IP54 protection rating and intelligent air cooling, it operates stably in environments ranging from -10°C to 55°C. It features built-in RS485 BMS communication for seamless integration with mainstream 48V lithium batteries and ensures uninterrupted power for critical loads via a rapid 10ms switchover. Whether for large villas, farms, or small factories, the GPEO-12KL1 serves as a reliable and efficient power core.

The product boasts an IP54 protection rating, a wide MPPT voltage range (85V–450V), and peak efficiency of up to 99.9%. It also includes a built-in BMS communication interface (RS485) that perfectly matches our 51.2V series LiFePO4 batteries, enabling intelligent and stable off-grid power supply.

Product Parameter

Key Features

1. Ultra-high conversion efficiency

Achieves a peak efficiency of 99.9% and an MPPT tracking efficiency of 99.9%, maximizing PV energy utilization and minimizing energy loss.

2. Wide MPPT Operating Range

Features a maximum input voltage of 500V and an MPPT operating range of 85V–450V (start-up voltage: 85V). It supports dual MPPT channels, with a maximum input current of 27A per channel (54A combined), making it compatible with various PV string specifications.

3. Intelligent BMS Communication

Equipped with a built-in RS485 communication interface, 12kW 48V Parallel Off Grid Solar Inverter supports real-time interaction with lithium battery BMS, dynamically adjusting charge/discharge parameters to protect the battery and extend its service life.

4. Powerful Parallel and Three-Phase Networking Capabilities

Single-phase parallel expansion: Supports parallel operation of up to 12 units for easy power scaling, achieving a total output power of 144kW to meet load requirements ranging from residential to small-scale commercial and industrial applications.

Three-phase system networking: Supports paralleling 3 to 12 units to form a three-phase 380V system with balanced output, suitable for medium-sized industrial loads such as three-phase motors, water pumps, and air conditioners.

5. High Protection Rating and Wide-Temperature Operation

Boasts an IP54 protection rating (dust and splash-proof) and operates stably in temperatures ranging from -10°C to 55°C, making it adaptable to various installation environments.

6. Rapid Switching and Stable Output

Typical grid/off-grid switching time of 10ms (UPS mode) and output THDv < 3%, providing clean power for sensitive loads.

Product Applications

1. Residential Off-Grid Energy Storage Systems

Provides round-the-clock power supply for areas without grid access or with unstable grids; when paired with PV and batteries, it enables self-consumption and energy independence.

2. Emergency Backup Power

Automatically switches over during grid outages, providing uninterrupted power to critical loads such as refrigerators, lighting, and communication equipment.

3. Power Supply for Remote Outdoor Areas

Suitable for environments without grid access such as wilderness campsites, agricultural greenhouses, communication base stations, and border outposts ensuring a reliable power supply.

4. Small-scale Commercial and Industrial Energy Storage

Multiple units can be connected in parallel to scale up power output, meeting the daily electricity needs and peak-shaving/valley-filling requirements of small factories, shops, charging stations, and similar facilities.

Why choose KTAC?

1. 3-year standard warranty

The GPEO-12KL1 comes with a 3-year warranty, which is superior to most competitors in the same category. Extended warranty options can also be provided as needed.

2. Over 20 years of manufacturing experience

KTAC has been focusing on power supply and energy conversion solutions since 2004. It has 3 factories, a total area of over 8,000 square meters, 8 professional production lines, and 100 engineering and quality control teams to ensure stable quality and reliable delivery. Its products are exported to over 30 countries in Asia, Europe, Africa, and America.

3. Strict quality control

Each 12kW 48V Parallel Off Grid Solar Inverter undergoes 100% aging tests before shipment. The factory holds ISO9001:2015 certification, and the products comply with international safety standards such as CE, LVD, EMC, and UN38.3. The IP54 protection level ensures reliable operation even in dusty or humid environments.

4. Full-process customization support

From the color and logo of the enclosure to the matching of third-party battery BMS protocols, factory preset of factory parameters, customized packaging, and multi-language manuals, we customize every detail according to your project or brand requirements.

5. Professional technical support

The after-sales team provides 48-hour email/WhatsApp responses, rapid shipment of common spare parts, installation and troubleshooting video guidance. With over 20 years of on-site visit experience, we understand the actual challenges you face and are ready to provide support at any time.

FAQ

1. Can the 12kW 48V Parallel Off Grid Solar Inverter be used in parallel?

Yes. The GPEO-12KL1 supports the parallel connection of up to 12 units of the same model to expand capacity and provide redundancy. Parallel operation requires dedicated communication cables and the configuration of master/slave modes.

2. How can a three-phase system be configured?

Connect three inverters using synchronization communication cables and configure them as Master (Phase A), Slave 1 (Phase B), and Slave 2 (Phase C). Each phase outputs 12kW, resulting in a total three-phase power of 36kW. Further parallel expansion per phase is possible to achieve higher three-phase capacity (e.g., 4 units in parallel per phase for a total power of 144kW).

3. Is it compatible with third-party lithium batteries?

The inverter features an RS485 interface and an open BMS communication protocol. It is compatible with lithium batteries that support standard protocols (such as Pylontech); however, using it with our company's 51.2V LiFePO4 battery series is recommended for a plug-and-play experience.

4. Can the inverter operate normally in low-temperature environments?

The operating temperature range is -10°C to 55°C. If the ambient temperature drops below -10°C, the unit may fail to start or require load reduction. For long-term use in extremely cold regions, installing the equipment in an insulated enclosure or indoors is recommended.

5. How can the UPS function be enabled?

Connect the grid power to the AC input port and set the operating mode to "UPS Priority." When mains power is normal, the inverter supplies power via bypass and charges the battery; upon a mains power outage, the inverter switches to battery inverter mode within 10ms, ensuring an uninterrupted power supply to critical loads.

6. How should the PV panels be configured?

It is recommended that the PV string open-circuit voltage (Voc) does not exceed 500V and the operating voltage remains between 85V and 450V. For example, you can connect 8 to 9 standard 600W panels (Voc ≈ 50V) in series; each MPPT channel can accept 1 to 2 strings of modules (ensure the total current does not exceed 27A per channel).