Solar water heaters due to their incredible advantages have gained popularity in recent years and are now being used by many individuals both for residential as well as commercial purposes. Solar water heaters ensure that the environment is not harmed while also saving a lot of money on electricity bills. They require very little maintenance and are quite simple to install. Overall, a solar water heater installed once will last for many years and save you a lot of money. solar water heater manufacturers in India produce a variety of models, and you may choose the one that best meets your needs and budget by making your purchase.

    When it comes to the specification of solar water heaters, many people are confused because these water heaters, as discussed earlier, come in a variety of shapes and sizes. When it comes to the capacity, the confusion increases further because people do not know how much capacity a solar water heater would be sufficient for the family or for the industry. So, in this article, we will discuss how much should be the ideal capacity of a solar water heater.

How big solar water heater should one purchase?

As discussed earlier, the capacity requirement of every individual and industry for a solar water heater might be different but we will try to find the average capacity here. Before purchasing the solar water heater, one should keep a few points in mind when it comes to capacity and size of the system. These are discussed below

• The main idea is that it is preferable to get a system that is less powerful than what you need. Other water heating methods might be employed when additional water is needed. Better efficiency and fewer operational issues will result from this.

• The best course of action is to calculate the daily hot water demand directly. When estimating, keep in mind that the solar system is built for ordinary bright days and can only heat a certain amount of water. Also keep in mind that the combination of the tank size and the collector area determines the temperature of the water in the solar system. It would often be 50 to 60 degrees Celsius, which is substantially hotter than bathing water, which is about 40 degrees Celsius.

• As a standard illustration of solar system sizing, a 100 litre system is often regarded as ideal for a family of four adults.

• Commercial solar water heaters may be scaled up in multiples of 500 LPD (Litres Per Day), starting at 500 LPD. Depending on how the solar water heater will be used, the capacity may be chosen.

• When it comes to bathing applications, the capacity is determined by how many people bathe each day and how frequently they do so. Per bath, it is expected that each individual uses 25 litres of hot water on average. With all of these factors taken into account, the following formula may be used to determine the necessary solar water capacity:

Cooking Capacity

The amount of hot water needed for cooking can be used to determine the capacity in the case of a cooking application. 1.5 times the amount of hot water needed for cooking equals the required solar water heater capacity. Here, a constant factor of 1.25 helps in maintaining a minimal amount in storage in addition to the necessary hot water. For instance, if 1000 litres of hot water are needed daily for cooking, the necessary capacity of the solar water heater is 1.5 * 1000 = 1500 LPD.