Growatt SPE 12000 ES Inverter Single Phase

Growatt SPE 12000 ES Technical Data

The Growatt SPE 12000 ES is a 12kW hybrid solar inverter designed to integrate photovoltaic panels, battery storage, and AC power sources within a single-phase energy system. It supports dual MPPT tracking, smart load management through dual outputs, and grid-connected operation for peak shaving.

With a maximum recommended PV input of 15,000W and a 48V battery system, the Growatt 12kW hybrid inverter is designed for solar installations that require both energy conversion and backup power capabilities.

Solar PV Input Specifications

The SPE 12000 ES supports up to 15kW of recommended solar PV capacity under standard test conditions (STC). Its dual MPPT trackers help manage the output of two independent PV inputs, allowing greater flexibility when configuring the solar array.

The recommended PV capacity of 15,000W allows the solar array to be sized above the inverter’s nominal AC output rating. When designing the installation, the PV string voltage and current must remain within the inverter’s specified input limits.

AC Output and Power Specifications

The Growatt SPE 12000 ES inverter delivers a nominal AC output of 12,000W at 230V. It is intended for single-phase applications, with a specified output current of 52.2A and an adjustable power factor range from 0.8 leading to 0.8 lagging.

The rated output makes this model suitable for installations with substantial electrical loads, provided the total demand, starting currents, and load characteristics are compatible with the inverter’s capabilities.

Battery Compatibility and Energy Storage

The SPE 12000 ES uses a 48V nominal DC battery system and supports both lithium and lead-acid batteries. Its maximum specified charging current is 250A, while the maximum discharging current is 280A.

Battery selection should account for the battery’s discharge-current limit, usable capacity, communication compatibility, and the expected duration of backup operation. A battery with insufficient discharge capability may limit the power available to connected loads, even when the inverter has a higher nominal output rating.

Backup Power Output

The Growatt SPE 12000 ES includes a dedicated backup power function with a nominal output power of 12,000W. Its specified backup output voltage is 230V, and the output frequency is 50/60Hz.

The specified transfer time is relevant for installations where maintaining power to selected loads during a grid interruption is important. Actual continuity depends on system configuration, battery availability, load characteristics, and the requirements of connected equipment.

Grid Connection and Hybrid Operating Functions

The SPE series supports two AC input terminals with an integrated transfer switch. The manufacturer also identifies grid-connected operation for peak shaving, parallel operation for capacity expansion, and dual outputs for smart load management as key features.

Parallel capacity is a series-level specification stated in the manufacturer’s datasheet. The exact number of units, wiring arrangement, and compatibility requirements should be confirmed against the applicable installation manual before designing a multi-inverter system.

Efficiency Ratings

The Growatt 12kW inverter has a maximum conversion efficiency of 96.5% and a European efficiency rating of 95.5%, according to the manufacturer.

Maximum efficiency represents the best specified conversion performance under suitable operating conditions. European efficiency provides a weighted performance figure intended to better represent operation across a range of conditions.

Growatt SPE 12000 ES Dimensions and Hardware

The SPE 12000 ES has a compact, transformerless design with forced-air cooling. Its IP20 enclosure rating is an important consideration when choosing an installation location.

The IP20 rating means that the inverter requires a suitable protected installation environment. It should not be treated as an IP65- or IP66-rated outdoor inverter.

Environmental Operating Conditions

The manufacturer specifies an operating temperature range of -10°C to +50°C. The unit is also rated for installation at altitudes below 2,000m, with relative humidity between 5% and 95%, provided condensation does not occur.

Adequate ventilation and protection from moisture are important when installing this hybrid inverter. Installation conditions outside the specified environmental limits should be evaluated against the manufacturer’s instructions.

Growatt SPE 12000 ES Installation Requirements

The Growatt SPE 12000 ES must be installed by a qualified professional in accordance with the manufacturer’s user manual and applicable electrical regulations. Correct mounting, cable sizing, circuit protection, and connection polarity are essential for safe operation.

1. Mounting and Installation Location

• Mounting position: Install the inverter vertically on a suitable, load-bearing wall.
• Installation environment: Choose a well-ventilated location away from direct sunlight, rain, moisture, and flammable materials.
• Accessibility: Position the unit where the LCD display can be read easily and maintenance can be performed safely.
• Ventilation: Do not install the inverter in a confined space without adequate airflow.
• Protection rating: The IP20 enclosure requires a protected installation location and is not designed for direct exposure to weather.
• Operating temperature: The specified operating range is -10°C to +50°C.

2. Battery Connection Requirements

The SPE 12000 ES uses a nominal 48V battery system and supports compatible lithium and lead-acid batteries. The battery bank must be capable of supplying the current required by the connected loads.

Install a suitable DC circuit breaker or disconnect device between the battery and inverter. Observe the correct positive and negative polarity, use appropriate ring terminals, and tighten the connections to the specified torque.

For lithium batteries, connect the battery management system (BMS) communication cable using the compatible RS485 or CAN interface. Confirm the battery communication protocol and settings before commissioning.

3. AC Input and Output Wiring

The inverter provides separate terminals for grid input, generator input, load output, and smart load output. These connections must be made according to the terminal markings and the manufacturer’s wiring diagram.

Install a separate AC circuit breaker between the inverter and the grid supply. Use correctly rated protection for generator and load circuits as required by the complete system design.

Connect the protective earth (PE) conductor first, then make the designated connections using the correct line (L), neutral (N), and earth (PE) terminals. Never interchange AC input and output terminals.

4. Solar PV String Connection

The solar array must be designed within the inverter’s DC input limits. The SPE 12000 ES features two MPPT trackers, allowing two independent PV inputs.

Before connecting the PV array, verify the string’s open-circuit voltage, operating voltage, and current against the inverter’s limits. The maximum DC voltage must not be exceeded, including under low-temperature conditions. Use suitable PV cables, connectors, isolation, and overcurrent protection as required by the installation design.

5. Pre-Commissioning Checklist

Before energizing the system, the installer should:

• Verify that the mounting hardware and enclosure are secure.
• Inspect the PV, battery, grid, generator, and load connections.
• Confirm DC polarity and AC terminal assignments.
• Check that protective earth and required circuit breakers are installed.
• Verify battery compatibility and BMS communication settings.
• Confirm that PV voltage and current are within the permitted limits.
• Check that all terminals are securely tightened to the specified torque.
• Configure the inverter’s operating parameters and confirm normal operation using the LCD display.

Suitable Applications for Growatt SPE 12000 ES

The Growatt SPE 12000 ES can be considered for single-phase hybrid solar installations that require battery storage, grid integration, and backup power. Suitable applications may include:

• Residential solar energy systems
• Homes with high electricity demand
• Solar installations with lithium or lead-acid battery storage
• Backup power systems for essential household loads
• Small commercial premises with compatible single-phase electrical supplies
• Solar systems using grid-connected peak shaving
• Installations requiring separate outputs for smart load management
• Expandable systems designed around compatible parallel inverter configurations

The suitability of the inverter depends on the connected loads, PV array design, battery discharge capability, and the site’s electrical requirements. Its nominal 12kW output should not be interpreted as a guarantee that every connected load can be operated simultaneously.

Growatt 12kW Hybrid Inverter Selection Checklist

Before choosing the Growatt SPE 12000 ES, compare the system’s electrical requirements with the specifications below.

This checklist provides a quick reference for evaluating whether the inverter’s PV input, battery characteristics, AC output, and environmental specifications match the proposed installation.

FAQs