Commercial Solar Power That's Unrivalled for Quality

High-performance SMA inverters
For over 30 years, SMA inverters have been the industry standard for the global solar power industry. That’s why we use them in our commercial solar power systems. All SMA inverters are manufactured using 40% less internal parts and more memory functions for greater performance and efficiency. Solahart’s three-phase inverters are setting new standards in inverter technology. The Sunny Tripower 20000TL and 25000TL inverters are ideal for large-scale commercial and industrial plants. Not only do they deliver optimum solar yields with OptiTrac Global Peak shade management and an efficiency of 98.4%, but they also offer enormous design flexibility thanks to their multistring capabilities and wide input voltage ranges.

World-leading REC panels
The harsh Australian environment demands quality solar power components. That’s why we use world-leading REC solar panels which are consistent with Solahart’s quality and performance requirements. REC panels are also a great choice for the environment.

Solar Panel Specifications

Panel Electrical Characteristics
Maximum Power (Pmax)
Power Class
Open Circuit Voltage (Voc) 37.6V
Short Circuit Current  (Isc) 8.95A
Maximum Power Voltage (Vmp) 30.5V
Maximum Power Current (Imp) 8.42A
Module Efficiency (%) 15.5
Temperature Coefficients  
-0.40%/ ˚C
-0.27%/ ˚C
+0.024%/ ˚C
Maximum System Voltage  ( IEC ) 1000V


Panel Specifications
Dimensions 1665 mm x 991 mm x 38 mm
Weight 18 kg
Cell Type and configuration 60 REC PE multi-crystalline cells
3 strings of 20 cells
Glass Solar glass with anti-reflection surface treatment
Back sheet Double layer highly resistant polyester
Frame Anodised aluminium
Temperature range -40°C to + 85°C
Junction Box Protection Class IP 67
Connectors Multi-contact MC4
Part Number REC255PE
Solahart Warranty 10 years (1 year labour) on panels*


PV Curves at Difference IrradiancesIV Curves at Different TemperaturesIV Curves at Different Irradiances 

Technical Data Sunny Tripower  5000TL Sunny Tripower  7000TL Sunny Tripower  10000TL Sunny Tripower  20000TL Sunny Tripower  25000TL
Input (DC)
Max. DC power
(@ cos Φ  =1)
5100 W 7175 W 10250 W 20440 W 25550W
Max. input voltage 1000 V
MPP voltage range /
rated input voltage
245 V ... 800 V /
580 V
290 V … 800 V /
580 V
370 V … 800 V /
580 V
320 V ... 800 V /
600 V
390 V ... 800 V /
600 V
Min. input voltage /
initial input voltage
150 V / 188 V
Max. input current input A / input B 11 A / 10 A 15 A / 10 A 18 A / 10 A 33 A / 33 A 33 A / 33 A
Max. input current per string input A / input B 11 A / 10 A 15 A / 10 A 18 A / 10 A    
Number of independent MPP inputs / strings per MPP input 2 / A:2; B:2 2 / A:2; B:2 2 / A:2; B:2 2 / A:3; B:3 2 / A:3; B:3
Output (AC)
Rated power
(@ 230 V, 50 Hz)
5000 W 7000 W 10000 W 20000 W 25000 W
Max. apparent AC power 5000 VA 7000 VA 10000 VA 20000 VA 25000 VA
Nominal AC voltage 3/N/PE; 220/380 V, 3/N/PE; 230/400 V, 3/N/PE; 240/415 V
Nominal AC voltage range 160 V - 280 V 180 V - 280 V
AC power frequency / range 50 Hz, 60 Hz / -5 Hz ... +5 Hz 50 Hz / 44 Hz ... 55 Hz
Rated power frequency / rated grid voltage 50 Hz / 230 V
Max. output current 7.3 A 10.2 A 14.5 A 29 A / 29 A 36.2 A / 36.2 A
Power factor at rated power 1
Displacement power factor, adjustable 0.8 overexcited ... 0.8 underexcited 1 / 0 overexcited ... 0 underexcited
Feed-in phases / connection phases 3 / 3
Max. efficiency / European weighted efficiency 98% / 97.1% 98% / 97.5% 98% / 97.6% 98.4% / 98.0% 98.3% / 98.1%
Protection devices
DC disconnect device
Ground fault monitoring / grid monitoring •/• •/• •/• •/• •/•
DC reverse polarity protection / AC short-circuit current capability •/• •/• •/• •/• •/•
All-pole-sensitive residual-current monitoring unit
Protection  class (according  to IEC 62103)  / overvoltage category
(according  to IEC 60664-1)
General data
Dimensions (W / H / D) in mm 470 / 730 / 240 mm 661 / 682 / 264 mm
Weight 37 kg 61 kg
Operating temperature range -25°C … +60°C
Noise emission (typical) 40 dB(A) 51 dB(A)
Self-consumption (night) 1 W
Topology Transformerless
Cooling concept OptiCool
Degree of protection  (according  to IEC 60529) IP65
Climatic  category (according  to IEC 60721-3-4) 4K4H
Maximum permissible value for relative humidity (non-condensing) 100%
DC connection / AC connection Sunclix / Spring clamp terminal
Display Graphic Graphic Graphic  
Interfaces: Bluetooth® / Webconnect • / • • / • • / •
Warranty 5 years*
Certificates and approvals AS 4777,  CE, CEI 0-211, C10/11:2012, DIN EN 62109-1,  EN504382, G59/3, G83/2, IEC 61727,  IEC 62109-2, NEN EN 50438, NRS 097-2-1, PPC, PPDS, RD 661/2007, RD 1699:2011, UTE C15-712-1, VDE0126-1-1, VDE AR-N 4105, VFR 2013, VFR 2014
SMA type designation STP 5000TL-20 STP 7000TL-20 STP 10000TL-20 STP 20000TL-30 STP 25000TL-30

*For full details see Solahart Owners Guide & Installation Instructions

• Standard features

o Optional features
Data at nominal conditions

1. Only with external NS protection

2. Does not apply to all national appendices of EN 50438

How Solar Power (PV) Systems Work

Solar power panels generate electricity from sunlight. The roof mounted solar panels are made up of many photovoltaic (PV) cells. These cells collect the sun’s light and convert the energy into DC electricity. This is fed through an inverter and converted to 240V AC electricity to power your home.

The amount of electricity you can produce depends on the number and efficiency of the panels, the size of the inverter and the amount of sunlight in your location. Your home remains connected to the electricity grid so when you generate more electricity than you need you can feed it into the grid or purchase more from the grid when you are not producing enough to meet your requirements.

The Science Explained

The amount of energy from the sun that falls on Earth's surface is enormous. All the energy stored in Earth's reserves of coal, oil, and natural gas is matched by the energy from just 20 days of sunshine. Outside Earth's atmosphere, the sun's energy contains about 1,300 watts per square meter. About one-third of this light is reflected back into space, and some is absorbed by the atmosphere (in part causing winds to blow).

By the time it reaches Earth's surface, the energy in sunlight has fallen to about 1,000 watts per square meter at noon on a cloudless day. Averaged over the entire surface of the planet, 24 hours per day for a year, each square meter collects the approximate energy equivalent of almost a barrel of oil, or 4.2 kilowatt-hours of energy every day. Deserts, with very dry air and little cloud cover, receive the most sun—more than six kilowatt-hours per day per square met

How does a solar cell turn sunlight into electricity?

The sun's light (and all light) contains energy. Usually, when light hits an object the energy turns into heat, like the warmth you feel while sitting in the sun. But when light hits certain materials the energy turns into an electrical current instead, which we can then harness for power. Solar technology uses large crystals made out of silicon, which produces an electrical current when struck by light. Silicon can do this because the electrons in the crystal get up and move when exposed to light instead of just vibrating in place to make heat. The silicon turns a good portion of light energy into electricity.

The most important components of a PV cell are two layers of semiconductor material generally composed of silicon crystals. On its own, crystallized silicon is not a very good conductor of electricity, but when impurities are intentionally added—a process called doping—the stage is set for creating an electric current. The bottom layer of the PV cell is usually doped with boron, which bonds with the silicon to facilitate a positive charge (P). The top layer is doped with phosphorus, which bonds with the silicon to facilitate a negative charge (N).

When sunlight enters the cell, its energy knocks electrons loose in both layers. Because of the opposite charges of the layers, the electrons want to flow from the n-type layer to the p-type layer, but the electric field at the P-N junction prevents this from happening. The presence of an external circuit, however, provides the necessary path for electrons in the n-type layer to travel to the p-type layer. Extremely thin wires running along the top of the n-type layer provide this external circuit, and the electrons flowing through this circuit provide the cell's owner with a supply of electricity.

How PV Cells Work

Most PV systems consist of individual square cells averaging about six inches on a side. Alone, each cell generates very little power (approximately four watts), so they are assembled together panels encased in glass and plastic to provide protection from the weather. These panels are either used as separate units or grouped into even larger arrays to form a solar power (PV) system.

Solar Power System Design

The Solahart Solar Power system is comprised of two main components; a string or array of photovoltaic panels and an inverter. The photovoltaic (PV) panels transform solar radiation into electrical energy in the form of direct current (DC). In order to utilise this energy and feed it back into the grid, the direct current is transformed into alternating current (AC) by the inverter. This conversion is also known as DC to AC inversion.

The alternating current generated by the inverter is fed into the main switchboard, which in turn is connected to the electricity grid. If the energy generated exceeds that required by property demands, your electrical network operator may allow the difference to be directly injected into the grid and become available to other users. Energy injected into the grid can be measured by electricity network operators as either gross (everything generated) or nett (excess generated). Injected energy may or may not be purchased by the local electrical network operator according to national and local standards, and regulations.

PV Panel Orientation & Inclination

To maximize system output, install panels at optimum orientation and inclination (tilt) angles. The specifics of this will depend on the installation location and must be calculated by a qualified system designer. The ideal angle for mounting a panel should result in the sun’s rays falling perpendicular (i.e. at a 90° angle) to the panel surface.

Panels should be installed in a shade free position. Even minor or partial shading of the panels/array will reduce system output. A panel is considered shade free when it is both:

  • Free from shade or shadows all year round.
  • Exposed to several hours of direct sunlight, even during the shortest days


Commercial Solar Power Brochure: Download

Inverter Data Sheet 5/7/10 kW: Download

Inverter Data Sheet 20/25 kW: Download