How to Turn Off a Solar Hot Water System


To turn off a solar hot water system, follow the steps, or use instant shut-down switches if available.

A solar water heater may occasionally need to be turned off for maintenance, upgrades, or unexpected issues like leakage or overflow. If you’re unsure about how to turn on or off solar hot water system, read our comprehensive guide to do so safely.

Can You Turn Off the Solar Hot Water System?

Yes, most solar hot water controllers have a shut-down switch to instantly turn down the complete solar hot water system for safety reasons. If the water heating system is broken, leaking, or has other issues, turning it off may become urgently required.

A solar hot water system is an eco-friendly approach to heating the water supply in your house that typically includes:

  • Thermal solar collectors (also known as thermal solar panels)
  • A fluid and exchanger system for heat transfer
  • Water container
  • Water meters
  • A system controller

How to Turn Off a Solar Hot Water System

You need to follow the following steps to turn off the solar hot water system at your home:

Step 1: Turn off the solar isolator in the solar pack first. Find the solar electrical box, which is often next to your electrical service board. Locate the solar breaker by opening the door. Position the switch so that it says OFF.

Step 2: If solar energy is insufficient, the booster is a heating element that supplies backup power. Simply flip the switch labeled water heater or booster to turn it off.

Step 3: An isolation valve that regulates the water supply to the heater should then be closed. In numerous systems, the valve may be turned with a standard wrench and is situated close to the storage tanks.

How Can I Maintain My Solar Water Heater When Not in Use?

JAN23 How to Turn Off a Solar Hot Water System 2

You might be concerned about how to keep your solar water heater safe when it’s not in use. Here are some points to help you maintain the condition of your solar water heater:

  • Use insulation to cover the solar collector. This will lessen the amount of heat that escapes from the collector.
  • Empty the solar storage container of its water. This will lessen the chance that the water will freeze and harm the tank.
  • Cut off the water supply to the solar water heater. This will stop any water from getting inside and harming the system.
  • Place a tarp or other cover that is protective around the solar water heater. This will lessen the chance of the unit being harmed by the elements.
  • Keep the solar hot water system in a secure location that is dry. This will aid in avoiding any harm while it is not in use.

Also See: Does a Solar Water Heater Work at Night?

How to Turn on Solar Hot Water System

Now that we learned how to turn off the solar hot water system, here is the step-by-step process to turn it on.

Step 1

Switch on the water source and look for the control valve for the cold-water inlet. The storage tank for your solar water heating system is often found beneath the water heater if it is situated at ground level. To open the valve, turn it in a counterclockwise direction. For systems with a tank located on the roof, the valve is typically right adjacent to the storage tank.

Step 2

Get the air out of the system. It’s crucial to switch on all the warm water taps throughout the house, just like conventional hot water systems. Once you’ve done that, find the cold-water isolating valve and completely open it. Then, turn on all the faucets and let the water run until it flows out freely, which indicates that all the air has been released.

Step 3

Then you can connect the solar control panel. Split solar systems have a circulating pump that moves water up into the roof-mounted solar collectors. The solar control unit must be turned on or connected to the power source, which is typically the power outlet next to the storage tank, no matter whether the heating system is powered by electrical or gas energy for the cylinder.

Step 4

The next step is to activate the booster, which could be gas or electrical. Typically, electrical boosters are equipped with a switch inside the house with an indicator light.

Step 5

You need to adjust the temperature settings and keep an eye on the system’s performance after activation to confirm it’s functioning properly and supplying hot water as required. If you face any issues, consult the manufacturer’s troubleshooting guide or seek professional assistance. You can also check out this YouTube video which will help you understand the temperature adjustments.

Cross-Reference: Turning on the solar hot water for the first time

Precautions While Turning On and Off a Solar Hot Water System

We need to go over some crucial safety measures before getting into ways to turn off and on the solar water heating system.

  • Whenever operating solar water heaters, always be sure to put on protective gloves and goggles because they contain both electrical components and high-temperature fluids.
  • Before beginning any alteration, make sure to separate the system from the power mains and never handle wet wiring.
  • In winter, you need to insulate outdoor pipes and exhaust overflow pipes with rubber and plastic insulation to avoid freezing conditions.
  • Monitor temperatures closely and accordingly supply water to prevent freezing.
  • Be cautious of freezing conditions as the pipeline might get frozen when temperatures drop below 0℃. You can maintain it by regularly adding water to the heater.
  • After freezing occurs, you can use antifreeze tape as a preventive to save energy and avoid damage.
  • Always make sure that the pressure and temperature relief valves are working correctly to prevent overheating or over-pressurizing it. 
  • To prevent any mishaps, follow the guidelines provided in the user guide. If you have any doubts about its operation, consult a technician.

Now, you know how to turn off a solar hot water system and what precautions you must take while doing so. We hope the information was valuable to you. Stay tuned for more informative articles.

Recommended: How to Start a Solar Panel Recycling Business

Leave a Reply

Your email address will not be published. Required fields are marked *