Solar Water Heaters

Solahart – Nepal

Solahart Nepal started in 1995. From Kathmandu to the Everest Base Camp, we have installed hundreds of Solahart Systems in Nepal. Furthermore, we have supplied systems to Humla, Jumla, Namche, Pheriche and other areas in the Himalayan region as our systems work without failure even in extremely cold conditions – below 20-30 degrees.


Solahart manufactures a full range of residential systems using a variety of technologies to ensure we have a system suitable for almost any home or climate, there’s even a Solahart water heater in the Antarctic and at the base camp at Mount Everest. Our water heaters feature an electric or gas backup to ensure hot water at all times. Switching to a Solahart is one of the best things you can do for your family. And there’s a model to suit every home, regardless of where you live. It will give trouble free hot water for years.

There’s a Solahart for every home

With the sun’s abundant energy and pipe hot water 24 x7 it makes good sense to install a Solahart in your new home. Conventional electric water heating is the biggest single contributor to household energy consumption. Installing a Solahart is the best single thing you can do to make your new home more energy efficient. In fact, a Solahart in place of a conventional water heater will reduce energy consumption up to 50-90%*. You’ll beat rising energy costs and help the environment. The range of Solahart water heaters can be installed with little or no adjustment to the roof structure, depending on the model. There’s a Solahart to suit every home. Contact us find out more. *As said by Solahart international


Solahart has been at the forefront of adapting thermosiphon and heat pump systems for commercial use. Through years of experience, constant innovation, and product development, we have built a reputation around the world for engineering and manufacturing high quality commercial solar water heating solutions.

Commercial System

The Solahart Heat Store Series II system is a large capacity storage vessel filled with heat transfer fluid, designed to be interfaced to a quantity of Solahart’s proven high-performance solar collectors. The system can provide hot water only or hot water in combination with floor heating and/or pool heating. The intelligent controller controls all active components of the system; from the amount of solar gain and supplementary boosting to regulating floor and pool heating. Additionally, the data from the controller can be logged and viewed locally or remotely. The system utilises a large capacity storage vessel filled with heat exchange fluid. Immersed in the fluid are copper coil are exchangers through which the potable water supply is circulated. As the potable water passes through the coils the stored energy within the heat transfer fluid is conducted through the copper providing instantaneous hot water. The tank is well insulated and the copper coils inside the closed circuit water provide ample hot water under high pressure with large flows. When the unit is in standby mode the heat exchange fluid drains down from the collectors and is stored in the main storage vessel. When the controller senses a preset temperature differential between the collector and the Heat Store, the system pumps the heat exchange fluid from the storage vessel into the collectors where the solar heating occurs. Once the system is completely filled, the controller will adjust the speed of the pump to ensure the maximum solar gain is achieved. When the system has reached its maximum temperature, or, there is no more solar gain possible, the system switches back to standby mode, allowing the heat exchange fluid to drain back into the storage vessel. This ‘drain back’ process eliminates and risk of overheating on days of high radiation days and/or low hot water demand, and also provides protection from the freezing of the collectors during winter.

High Mountain

VIE TEC has installed many solar water heatings from SOLAHART in and around the Everest base camp, Jumla, Pheriche, Northen Gorkha, Kongde which are highly frost prone . Despite the horrendous climate, these solar heaters never fail to deliver.Very few solar water heaters can sustain in the punishing climate of the himalayas; SOLAHART is amongst them and at the very top.

Frequently Asked Questions (FAQ)

  • Does a Solahart take long to install? If your current solar hot water system breaks down Solahart can have you back in hot water within 24 hours to take away the inconvenience of cold showers.
  • What are the environmental benefits of a Solahart water heater? Water heating accounts for around 25% of the average household’s energy usage. Getting your hot water free from the sun not only saves energy, it also saves the greenhouse gas emissions that would have been produced in the generation of that energy. The Government also supports the Solar by reducing Custom Duty and Zero Vat of Solar Hot Water System.
  • Is there an alternative to placing the tank on the roof? Solahart’s revolutionary range of Streamline Split System solar water heaters allows you to enjoy all the benefits of Solahart’s advanced solar technology – without the tank on the roof. The Solahart Streamline system locates the low profile collectors on your roof, with the tank installed at ground level.
  • How long does it take to pay for itself? Financial payback will vary depending on your circumstances, but with the available incentives plus the ongoing energy savings you can begin to recoup your additional investment straight away when you remain connected to the same Electric Hot Water System. After you recover your initial investment, the savings are yours to spend on yourself and your family, year after year.
  • Why do solar water heaters have boosters? All solar water heaters include electric boosters to ensure you have hot water even during the colder, darker days of winter, on those rainy days and as more friends – family join. By selecting the right Solahart model for your area and your family’s hot water usage patterns, you can ensure you minimise the need to use the booster.
  • What Government subsidy is available? There is no subsidy available for Solar Hot Water in Nepal but is rebate provision in custom duty and zero VAT to support the Green Energy.
  • Is the position on the roof important? Solar systems work best on an unshaded south-facing roof. It is also possible to install a solar system on an east or west facing roof. However, this will reduce the performance of the system.
  • What is the difference between a solar hot water system and a solar power system? A solar hot water system uses the visible and infrared radiation from the sun to directly heat water. A solar power system uses the visible radiation from the sun and converts it into electricity for use in the home or to be fed into the electricity grid.