# How To Easily Read a Solar Inverter Datasheet (Solar Power Inverter Specifications) Part 2: Output Data

This article explains easily how to read the relevant terms in a solar power inverter datasheet (**solar inverter specifications**) and how **valuable** this information is in order to choose the best one.

Before you read this article, you need to see the article about **How To Easily Read a Solar Inverter Datasheet (Solar Power Inverter Specifications) Part 1: Input Data.**

The following is an example of a solar inverter datasheet, taken with actual values from an **SMA SUNNY TRIPOWER 15000TL-US**.

If your solar specialist offers you a number of different inverters, **look** the solar inverter specifications **carefully** and be informed about these points.

## Technical data

### Output (DC)

#### 1. AC (output) nominal power

AC stands for alternating current and refers to the output side of the solar power inverter.

The **AC nominal power** of the solar power inverter (15000 Watt) is defined as the output specified for the PV inverter when in continuous operation.

**The larger** this value is, the better and more expensive the solar power inverter.

#### 2. Maximum AC apparent power

The maximum AC apparent power of the solar PV inverter is 15000 VA. The apparent power consists of two parts:

- A
**usable part**called real power, and - A
**useless part**called reactive power.

The **power factor** cos(φ) describes the quantitative ratio of the real used power to the apparent (total) power in the circuit.

Cos(φ) = 1 means it only flows real power to the load.

**The larger** this value is, the more powerful and more expensive the solar power inverter.

#### 3. Output phases / line connections

The **Sunny Tripower 15000TL-US** converts the direct current of the PV array to grid-compliant three-phase current.

**3 / N / PE** refers to three-phase AC current 5-wire system with separate neutral and protective earthing conductor

- 3 is the number of phase conductors (three outer wires
**L1, L2, and L3)** - N is for the
**neutral conductor** - PE is for the
**protective earthing conductor**(grounding conductor)

Three phase solar power inverter is **better** than the single phase inverter.

#### 4. Nominal AC voltage

The standard configuration is a 480/277-volt wye system. The **480 volts** is usually for motors and some appliances, and the **277 volts** is used for standard appliances.

#### 5. AC Voltage Range

This is the **range of AC voltages** with which the solar inverter can work.

A **good** solar power inverter has a large AC voltage range.

#### 6. AC grid frequency / range

The AC grid frequency is the **nominal frequency** of the oscillations of alternating current in a utility grid transmitted from the solar power inverter to the end user.

It can **vary** in accordance with the corresponding country-specific standards (50 or 60 Hertz).

The** allowable AC frequency range** at the output of the solar power inverter is between 44 and 65 Hz. This parameter is used in the anti-islanding feature of the solar PV inverter.

A **good** solar power inverter has a large AC frequency range.

#### 7. Rated AC grid frequency

The **rated** AC grid frequency at the output of the solar PV inverter is 60 Hz (USA Frequency).

#### 8. Maximum output current

The maximum AC current that the inverter can **deliver** is 24 Amper.

#### 9. Power factor at rated power / adjustable displacement

The **power factor** cos(φ) is given as a numerical value between 0 and 1 and describes the quantitative ratio of the **real power** flowing to the load to the **apparent power** in the circuit.

It relates to the **phase angle difference** (either leading or lagging) of the voltage and current traveling through the circuit.

**Cos(φ) = 1** means it only flows real power to the load.

The solar power inverter **must conform** with the requirements of the grid operator according to the Power Factor and the reactive power.

#### 10. Total Harmonic Distortion (THD, Harmonics)

Total Harmonic Distortion (THD) is defined as the ratio of the sum of the power of **all the signal harmonics** to that of the power of the **fundamental frequency**.

The **lower** the THD, the better.

## Comments