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Our Brands

SolarWorld - With over 40 years of solar PV module manufacturing experience, SolarWorld solar modules are made in Germany. With a 20 year product warranty that is above the current market standard, SolarTherm is the authorised distributor for SolarWorld Modules in Sri Lanka.

quality award 1 logo

The positive power tolerance guarantees utmost system efficiency. Only modules achieving or exceeding the designated nominal power in performance tests are dispatched. The power tolerance ranges between -0 Wp and +10 Wp.


20 years product warranty – The 20-year product warranty is above the market standard and offers our customers a high level of investment security.


Sunmodule Plus – With its linear performance guarantee covering a period of 25 years, SolarWorld Industries GmbH guarantees a maximum performance degression of 0.7 %. The service certificate offers comprehensive protection for your investment in the long term.


Authorized Distributor Certificate - Solar Therm is the Authorized Distributor for Solar World Solar Modules in Sri Lanka


Our products must deliver what they promise – over their entire service life. Quality standards ‘Made by SolarWorld’ are based on the real-world conditions our modules will be exposed to. SolarWorld thus takes the decisive extra step in testing and assuring module quality – in a way that far exceeds industry standards. We have doubled the product warranty for our modules from 10 to 20 years* thus offering our customers even better investment security for the system – because we are convinced: REAL VALUE lasts longer!

Top quality ‘Made by SolarWorld’ – independently verified: The certificate “VDE Quality Tested” from the German Association for Electrical, Electronic + Information Technologies – VDE certifies SolarWorld modules as having high reliability, low degradation and optimized functional reliability. For our customers, this means even more security for their investment.

With innovative PERC cell technology, we continuously deliver higher performance at the same module size with the same highest quality standards for the materials used. For our customers, in the future, we are delivering all modules with mono-PERC cell technology in 10 Wp performance classes. With this, our customers are receiving on average more power per nominal power class; distributors and installers benefit from the reduced number of articles and higher availability

Every year, TUV Rheinland monitors and calibrates the luminous intensity, spectrum and homogeneity of the flasher in the SolarWorld production. The productive capacity of the solar modules is measured with the flasher. For consumers and investors of SolarWorld modules, proven power production means that investment and projected yields are secure. According to external and independent tests by TUV Rheinland, the performance of our solar modules exhibits a mere two percent measuring tolerance. No other manufacturer can give such an exact value. This means, our customers can be sure of reliable solar module system performance, and therefore also of their effective yield.



Fronius - Fronius was founded in 1945 and has been continued to thrive on its passion for new technologies, intensive research and revolutionary solutions. As a technology leader, the company finds, develops and implements innovative methods to monitor and control energy for photovoltaics and battery charging.Fronius online system monitoring provides data communication solutions for PV systems, ensuring reliable system monitoring and straightforward integration into other systems. The hardware is quick to install and the software easy to use. SolarTherm is the authorised service partner for Fronius Inverters in Sri Lanka with Service Partner PLUS certified.

Country of manufacture - Austria
Fronius FSP

The SnapINverter generation of inverters features a simple, standardised mounting system, making installation and maintenance easier than ever. A special feature in the design of the device is that the connection area is separate from the power stage set compartment, with both being installed separately. The remarkably light connection area and all its cabling is fitted to the wall first, followed by the power stage set. The innovative hinged system makes installation and servicing extremely user-friendly. The inverter is simply placed in the mounting bracket and then secured. This means that it is not necessary to remove the entire inverter for servicing, just the power stage set. All the cabling remains in place

We are the first inverter manufacturer to offer a data communication package with fully integrated datalogging, WLAN, Ethernet, energy management, web server and a range of interfaces. The inverter is connected to the internet by network cable or WLAN – without additional cabling – and grants you the perfect overview of how the PV system is operating. Connection to third-party components is provided by means of interfaces such as Modbus TCP SunSpec, Modbus RTU SunSpec or Fronius Solar API (JSON). The open interfaces can also be operated in parallel to Fronius Solar.web

The Fronius SuperFlex Design is an ingenious combination of technical performance attributes that make designing your PV system not only extremely simple, but also incredibly flexible. The key performance factors of the SuperFlex Design are two MPP trackers, together with a high system voltage and wide DC input voltage range. Every DC input, and therefore every MPP tracker, is able to accommodate the entire nominal output of the inverter. Regardless of whether the inverter has to cope with different roof orientations, shading of one or two strings, or the use of residual modules: a Fronius inverter with integrated SuperFlex Design will satisfy every conceivable operational PV system planning scenario using just a single inverter model.

The Dynamic Peak Manager is a new MPP tracking algorithm that dynamically adapts its behaviour when searching for the optimal operating point. Its special feature is that the Dynamic Peak Manager automatically checks the entire characteristic curve on a regular basis and finds the global Maximum Power Point (GMPP), even in partial shade

SMA - SMA Inverters are made in germany an suitable for all module types including grid-connections, small house systems and commercial systems in the Megawatt range and even for utility-scale PV power plants up to the multi megawatt range. Designed for optimum performance and maximum yields, SMA inverters are an economical solution for shade mitigation and the challenges of complex roofs. Moreover, it comes complete with grid-management capabilities, ensuring a utility-compliant solution for customers operating in any market.

Country of manufacture - Germany
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The development of modular system technology resulted in the trend setting Sunny Boy string inverter family. More than 60 MW AC of total inverter power have been installed to date, defining new standards in PV technology.

A strong partner into the future SMA Regelsysteme GmbH with 400 employees is a high-tech company with continual 30-40 % annual growth. The company is the largest supplier of grid-interactive PV inverters in Europe. SMA has gained experience from : Over60MWACof total "Sunny Boy string inverter" power installed so farure a report is automatically faxed to any number desired. For detailed information on our com-munication equipment, please see our "Sunny Boy Communication" brochure.

The "Sunny Boy" from SMA is the first inverter to comply with all applicable national and international standards. Furthermore, SMA has always been a pioneer in new safety technologies such as redundant anti-islanding protection and all-pole sensitive GFCI - offering a maximum of protection. Independent institutions have certified that the Sunny Boys from SMA comply with all applicable standards (such as UL and EC Standards covering low volt-needs. On request, we can also train your employees on your own premises. Our comprehensive training program combined with the excellent quality of our products ensures the customer's long-term satisfaction.

The Sunny Boys are designed for a MTBF of over 100,000 hours and more than 20 years of operation. In order to achieve this long life SMA selects only the best available components such as selected electrolyte capacitors with the best available temperature perform-ance, etc.

SMA is the first manufacturer to design all its inverters for outdoor operation. The stainless-steel cases comply with protection class IP65 (NEMA 4x). The electronics even operate in extreme weather conditions with ambient tem-peratures of -25 °C to +60 °C. Over 60 MW AC of total SMA inverter power have been installed to date SMA therefore has extensive experience with the outside mounting and every detail is continually improved. No other manu-facturer of PV inverters has such exten-sive and long-term experience in out-door mounting of inverters.

In order to save time and cost during installation, all "Sunny Boys" have a very simple and practical three-point mount-ing system. SMA was the first manufac-turer to use an electrical connection sys-tern with safe-to-touch plugs. This sim-plifies installation and allows the wiring to be prepared in the workshop in order to save time on site later.

SMA production complies with ISO 9001. The company has been Q1 sup-plier to customers such as Deutsche Bahn AG (German Railways) for years. Furthermore SMA has been successfully audited as a supplier to various cus-tomers in the automobile and electron-ics industry such as Volkswagen, Phoenix and ABB.The Sunny Boy was the first PV inverter incorporated into a PV system to receive the "TOV PROOF" certificate by TOV Rheinland. This quality certificate stands for excellent technical and practical fea-tures.ln a 1999 test of PV modules and invert-ers our devices were qualified "good" (Sunny Boy 850) and "very good" (Sunny Boy 1500).For detailed test results please see the leaflet "Sunny Boys, the test winners".