SolarTherm
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SolarTherm is the most trusted brand in the Sri Lankan Solar industry, operating since 1982 with a cu and Alpha Solar Energy Systems (Pvt) Ltd.
SolarTherm is the house hold solar energy service provider in Sri Lanka with the largest customer base over 80,000 customers. We are the pioneers in the solar Water Heating industry with two factories operating in Ekala industrial Estate and Kandana. We are also one of the pioneers in Solar Photovoltaic (electricity) industry for more than 2 decades in Sri Lanka. SolarTherm products are sold by Alpha Thermal Systems (Pvt) Ltd. Our reference projects include largest privately own solar park and the largest solar water heating systems installed in Sri Lanka. SolarTherm water heaters are manufactured in Sri Lanka and customized solutions are integrated using reputed manufacturers across the world. We are an authorized dealer for products from Rheem Australia, a global leader in the solar water heating industry. We are also the exclusive dealer for SolarWorld, solar electricity modules from Germany, which are known as the quality leader in the module manufacturing industry for over 35 year. SolarWorld is the largest high efficiency PV module manufacturer in the world and the largest manufacture off of China. We are also sales and service partner for Fronius inverters made in Austria, considering as the leader in inverter technology for over 20 years.
18/09/2026
With Solartherm systems, you're not just buying electricity; you're investing in property value, energy independence, and sustainability assets.
Talk to your accountant. Then talk to us.
Call 011 267 9944 for more details.
17/09/2026
Monsoon panic meant unnecessary electricity use. The bill reflects it all.
But those with Solartherm?
Your next month's bill will be zero. Not reduced. Zero.
Call 011 267 9944 for more details.
15/09/2026
Rainy days make a warm shower feel even better.
And when it’s powered by a Solartherm hot water system?
That’s comfort you can enjoy without the guilt.
Call 011 267 9944 for more details.
11/09/2026
මේ මාසෙ කරන්ට් බිල ආවා නේද?
කරන්ට් එක වැඩිපුර ගියේ මොකටද කියලා පසුතැවෙන්නෙ නැතුව අදම Solartherm Panels වලට මාරු වෙන්න.�කරන්ට් බිල zero කරගන්න.
වැඩි විස්තර සඳහා 011 267 9944 අමතන්න.
09/09/2026
A perfect hot shower does more than clean.
When it's powered by Solartherm hot water system? That's wellness without guilt.
Call 011 267 9944 for more details.
Trusted by Businesses. Proven in Practice.
We are proud to have Earl's Regent Beruwala as one of our valued customers.
From delivering reliable solar solutions to supporting our customers throughout their journey, at Solartherm, we are committed to making the transition to smarter energy seamless and dependable.
We are pleased to hear directly from the team at Earl’s Regent Beruwala about their experience with our solutions and service.
28/08/2026
When the grid goes down, your battery kicks in instantly. Your lights stay on. It's not just about power. It's about protecting what matters: your home, your family, your peace of mind.
Call 011 267 9944 for more details.
25/08/2026
May this Eid bring peace to your heart, joy to your home, and blessings to you and your loved ones.
Why Solartherm? Don’t just take our word for it. Hear it from someone who experiences the difference every day.
From reliable hot water to everyday comfort and convenience, discover how Solartherm has made a real difference in our customer’s daily life.
25/08/2026
Done calculating?
Here's the move:Get you a complete Solatherm hot water system.
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Address
121 Castle Street Colombo 08
Colombo
00800
Opening Hours
| Monday | 08:00 - 17:00 |
| Tuesday | 08:00 - 17:00 |
| Wednesday | 08:00 - 17:00 |
| Thursday | 08:00 - 17:00 |
| Friday | 08:00 - 17:00 |
| Saturday | 08:00 - 13:00 |