Comparison Huawei SUN2000-5KTL-M1 vs Huawei SUN2000-5KTL-L1

— Single-phase (230 V). Single-phase power is well known from classic 230 V household sockets. However, this also often includes models for other alternating voltage values - for example, 110 V.

— Three-phase (400 V). Three-phase power supply with a voltage of 400 V is used mainly for energy-hungry devices for which 230 V networks do not provide enough power. This option can be used both for private households and in the industrial sector.

— Single-phase / three-phase. Models with the ability to connect to both single-phase power supply at 230 V and three-phase power supply at 400 V. This allows them to be used with both household and industrial networks - depending on which option is more convenient at the moment.

— DC (constant voltage). This category usually includes a few inverters for campers (motorhomes) (see “Device Type”). They are designed for operation in automotive networks with a constant voltage of 12/24 V.

The European inverter efficiency is measured based on several load values (e.g. 10%, 30%, 50%, 100%), which better reflects the actual operating conditions of the device. Indeed, in fact, inverters rarely operate at full power in constant mode. To calculate the Euro index, the weighted average of the inverter efficiency at different load levels is taken into account. Note that there is no single generally accepted formula here - it may vary depending on the specific standard or equipment manufacturer. Nevertheless, Euro efficiency allows you to more accurately assess the efficiency of the inverter under conditions of partial and full power use

The maximum current in amperes (A) that the inverter, when operating, is capable of outputting without overloads or failures.

The maximum amount of direct current in amperes that the inverter can convert. If the solar panel produces a current exceeding this value, the inverter simply does not use it. This is often justified when connecting an inverter to high-power solar panels - the maximum input current of the inverter is reduced to acceptable values so that moderate-sized wires can be used to transmit energy.

The operating range of the inverter is usually located between the starting voltage and the maximum voltage. This interval is indicated in volts.

The maximum solar panel short circuit current that the inverter can accept without the risk of breakdown or emergency shutdown. The parameter is usually indicated in amperes.

Strings in solar energy are chains of panels connected in series. With this connection method, the voltage of the solar panels is summed up, and the current remains constant, which allows you to significantly increase the power generation capacity while maintaining a fairly low current and without the need to use large-section wires.

Specifically, this paragraph indicates the maximum number of strings that can be connected to the inverter for solar panels.

— UPS function. Inverters with a UPS function automatically switch to battery-powered mode when there is insufficient power generation from solar panels or in cases where the main power source is disconnected. This ensures load redundancy. Note that switching may not occur instantly, but with a certain delay (about 10-30 ms).

— Connecting the generator. Inverters that support the generator connection function significantly increase the reliability and efficiency of autonomous solar energy systems. In practice, the function can be implemented in several basic ways. First, the system can automatically turn the generator on and off depending on the battery charge level or current power consumption, ensuring efficient use of resources and minimizing fuel consumption. Secondly, switching the load to the generator can be carried out when there is a shortage of electricity generation from solar panels. And thirdly, the generator can be used to maintain an optimal battery charge level so that the system is in full readiness at any time.

— Parallel connection. The inverter has special connectors through which two or more devices can be connected to a single electrical network. Parallel connection is used when one inverter is not able to pull the entire load from solar panels and the input power exceeds the capabilities of the device itself.

— Built-in monitoring. The presence of a built-in monitoring module on board the inverter, which collects information about the productivity of solar panels, allows you to monitor energy production and consumption, as well as monitor the performance of the system as a whole. Moreover, these parameters can often be viewed and controlled in real time (including through a mobile application for a smartphone). The monitoring module is usually connected to the Internet via a Wi-Fi network.

Connection interfaces provided in the inverter design for solar panels.

- RS232. A specialized communication interface used to directly connect the inverter to a computer. As a rule, the interface provides the ability to monitor solar generation systems around the clock using a local network. Also, the RS232 connector can be used to communicate several inverters with each other, or, less often, for software updates or service testing.

- RS485. A connector often used to connect several inverters to a central hub, which, in turn, connects to a computer. This connection can be useful for setting up a solar generation system or sending monitoring data over the network.

- USB. A standard USB port is often used for configuring equipment via a wired connection to a computer or for inverter firmware updates.

- LAN (RJ45). The presence of a LAN connector (RJ45) in the inverter design. Such ports are standardly used for wired connections in computer networks using a twisted pair cable.

- Wi-Fi. Wi-Fi communication module for wireless connection of the inverter to a computer, laptop or mobile phone. Using specialized software, you can receive monitoring data from the inverter directly “over the air” - transmitting information over a Wi-Fi network eliminates the...fuss with wires.

— Bluetooth. Option to wirelessly pair the inverter with smartphones, tablets or laptops via Bluetooth. Thanks to data synchronization, the user will be able to monitor equipment performance and remotely control the inverter within range of the Bluetooth wireless network.