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Operating A Tankless Gas Water Heater Without Electricity

Note: This post may contain affiliate links. This means that at no cost to you, we may receive a small commission for made purchases.

Tankless water heaters are becoming more common because they are less expensive to install and operate. They also provide better performance and efficiency compared to conventional models.

A tankless water heater uses hot water instantly instead of storing it in a large tank.

This means you don’t have to wait until the water has cooled down before using it. Tankless water heaters are typically more efficient than conventional units.

A tankless water heater is an excellent choice for homeowners who want to cut their energy costs by reducing the amount of time that their water is stored in a tank.

The best part about this type of unit is that there is no need to purchase or maintain a storage tank, which makes them very affordable.

The main reason why these types of water heaters require electrical power is that they use electric heating elements to quickly raise the temperature of your water.

These elements must be powered with electricity to work properly.

Table of Contents

How Do Tankless Gas Water Heaters Work?

This type of water heater works by circulating water through pipes that carry heated water from the burner to the point where it will be used.

A typical tankless water heater circulates water through a series of tubes, which heats up the water as it passes through.

When the water reaches its destination, it then flows into another pipe that carries the warm water back to the burner.

This process repeats itself continuously so that the water stays at a constant temperature.

It’s important to note that even though the water is constantly flowing through the system, it doesn’t actually get hotter over time.

Will My Water Heater Work During A Power Outage?

Most tankless water heaters are designed to continue operating during a power outage.

However, if you live in an area that experiences frequent blackouts, it may not be possible to rely on this feature. If your home loses power regularly, consider purchasing a backup generator.

Different Types And Fuel Supply Of Water Heaters

There are two different types of tankless water heaters: direct-fired and indirect-fired.

Direct-fired systems use a burner to directly heat the water. Indirect-fired systems use a boiler to preheat the water, which is then circulated through the piping.

Direct-fired tankless water heaters have been around since the early 1900s.

They were originally developed to help homes without access to natural gas. Today, most new homes are equipped with direct-fired tankless water heater systems.

Indirect-fired tankless water heating systems are newer technology. They are commonly found in older homes and apartments.

Indirect-fired tankless systems are generally more efficient than direct-fired models.

Tankless Vs. Conventional Water Heaters

Tankless water heaters are also known as instantaneous water heaters because they don’t store any of the water that they heat. Instead, they heat only what is needed right now.

This can save money since you won’t need to buy additional water when it gets cold outside.

Conventional water heaters, on the other hand, keep water in a large storage tank until you need it. Because of this, they often cost more than tankless units.

Electric On-Demand Water Heater

Electric On-Demand Water Heater

An electric on-demand water heater uses electricity to heat the water whenever it’s needed. The water is stored inside a tank or reservoir.

Electric on-demand water heaters are typically installed in larger buildings like hotels, hospitals, and schools.

They are also popular for commercial applications such as restaurants and office buildings. Since they don’t require a separate source of fuel, they can operate completely off the grid.

Gas On-Demand Water Heaters

A gas on-demand water heater is similar to an electric on-demand unit. Like their electric counterparts, these units use gas to heat the water.

However, unlike electric on-demand water heating, gas on-demand units aren’t connected to the electrical grid. As a result, they can run completely off-grid and do not require electricity to function.

Solar Water Heaters

Solar water heaters work just like conventional water heaters except that they use solar energy instead of electricity.

Solar water heaters are ideal for areas where there isn’t enough sun to support regular heating.

For example, many people living in northern climates install solar water heaters to supplement their existing heating system.

These units are also used by homeowners who want to reduce their carbon footprint.

Does A Gas Tankless Water Heater Need Electricity?

Many gas tankless water heating systems have an inbuilt backup power supply for use during power outages.

However, if your home doesn’t already have a power supply, you may need to connect one to your tankless water heater. Otherwise, the unit won’t be able to function properly.

How Much Does It Cost To Install A Gas Tankless Water Heaters?

Installation costs vary depending on the manufacturer and the size of the unit.

Some companies offer installation services at no charge while others charge anywhere from $1,000 to $5,000.

How To Keep Your Tankless Water Heater Running During A Power Outage

If you live in an area that experiences regular outages, you may want to consider installing a backup generator. You can find generators that run off propane fuel and diesel fuel.

You should also make sure that your home has enough batteries to supply power to all of your appliances when the grid goes down.

If you plan to use your tankless water heater as a backup source of hot water, you’ll need to ensure that your home has plenty of batteries available.

You can also invest in a solar panel kit to help charge your batteries if you live in an area where the sun shines most of the year.

HUGO Battery Backup For Tankless Water Heaters

The HUGO battery backup provides multiple benefits:

  • Allows you to continue operating your tankless water heater without having to worry about losing power
  • Provides protection against surges in electricity
  • Keeps your water hot when the power goes out
  • Can be installed anywhere on your property
  • Includes everything you need to set up and begin enjoying your new backup power system

Below are some additional reasons why it’s a good idea to install a HUGO backup battery for your tankless water heating system.

Flow Sensor Technology

The HUGO flow sensor technology allows the system to automatically turn on and off based on how much water is being used.

If you only need a small amount of hot water, the system won’t waste any energy by keeping the water hot.

Instead, it will shut off once the water runs low. This means that you can save money while still maintaining a comfortable level of hot water.

Dual Power Supply

The dual power supply ensures that your tankless water heater will operate even if there’s no electricity.

In addition, this system includes two separate power supplies that allow you to switch between them depending on whether or not you have access to electricity.

Easy Installation

The HUGO system comes ready to install. All you need to do is connect the unit to your existing piping and hook up the wires. Once everything is connected, you’re good to go!

Automatic Switch Over

When the power does come back online, the HUGO system will automatically switch over to the second power supply.

This means that you don’t have to manually flip a breaker or anything like that. The system will take care of switching over to the other power supply.

Indoor/Outdoor Installation

The HUGO indoor/outdoor system is designed to work in both indoor and outdoor environments.

It features a weatherproof design and a built-in thermostat that lets you control the temperature of the water coming out of the spigot.

Temporary Or Permanent Mounting Options

Depending on what type of mounting option you choose, the system can either be mounted indoors or outdoors.

For example, the HUGO indoor mounting bracket is ideal for homes with limited space. However, the outdoor version works well in areas with lots of room.

Multiple Installations

If you want to install more than one HUGO system, you can simply add another pair of units. Each unit will provide additional safety and reliability.

Eco-Friendly Design

The HUGO system uses less energy than traditional electric models. As a result, it helps reduce your carbon footprint.

Additional Features

  • 3-Year Warranty
  • Easy to Use
  • Weatherproof
  • Low Maintenance
  • No Need for External Controls
  • Installs in Minutes
  • Works Anywhere
  • Multiple Installations
  • Eco Friendly
  • Quick & Easy Setup

Installing The HUGO Battery Backup System

  1. Remove all plumbing from the wall outlet (located at the bottom of the tank).
  2. Attach the HUGO battery backup system to the wall outlet using the included screws.
  3. Connect the black wire from the HUGO battery pack to the red wire from the wall outlet.
  4. Connect the white wire from the HUGO battery pack to the ground wire from the wall outlet
  5. Plug the HUGO battery into an electrical socket.
  6. Turn on the water valve located on top of the tank.
  7. Check the water pressure (see also ‘How To Increase The Water Pressure In Your Shower‘) and adjust as necessary. 

What Is A Tankless Water Heater?

What Is A Tankless Water Heater

A tankless water heater is basically a device that uses a continuous flow of water instead of storing water in a large tank.

This allows it to provide hot water instantly instead of waiting hours for the water to heat up.

A tankless water heater is usually connected directly to your faucet or shower head and is controlled by a thermostat. The thermostat turns the unit on whenever there is a demand for hot water.

Tankless water heaters are great because they save energy and money.

Not only does this mean that you won’t have to pay for expensive utility bills anymore, but you won’t have to spend any extra money on buying bottled water either.

Advantages Of Owning A Tankless Water Heater

With a tankless water heater, you don’t have to wait for the water to heat up before using it.

Instead, the water instantly heats up as soon as you turn on the tap. This makes it easier than ever to enjoy hot showers and baths at any time of day.

If you’re looking for a reliable way to keep your water hot during power outages, then a tankless water heater could be just what you need. These systems are easy to install and maintain, so they’ll last for years.

They also provide a number of advantages compared to traditional storage tanks, including lower maintenance costs and less wasted energy.

A tankless gas water heater is a great way to heat water quickly and efficiently.

These types of systems are especially useful for homes with limited space because they require less floor area than traditional models.

However, it’s important to remember that these units aren’t meant to replace your main heating system.

They’re simply a convenient solution for those who need more hot water than their current furnace can provide.

There are many reasons why people choose to own a tankless water heater. Here are just a few of them:

  1. Save Money – Since a tankless water heater doesn’t store water, you don’t have to buy gallons of water every month. Instead, you can simply turn the tap on and let the water flow until it gets hot.
  2. No More Bottled Water – With a tankless water heater, you no longer have to buy bottles of water every week.
  3. Energy Savings – Because a tankless water heater heats water right before it flows from the spigot, you won’t waste any energy heating water that isn’t used.
  4. Instant Hot Water – When you turn on a traditional water heater, it takes several minutes for the water to get hot. However, with a tankless water heater you will always have instant hot water.
  5. Easy Installation – Installing a tankless water heater can be very easy. All you need to do is connect the unit to the existing plumbing and install the thermostat.
  6. Quiet Operation – Unlike conventional water heaters, tankless units run quietly so you won’t disturb your neighbors while using hot water.
  7. Versatile Use – Since a tankless unit doesn’t require storage space, you can use it in almost any room of your house. It’s perfect for bathrooms, kitchens, laundry rooms, basements, garages, etc.
  8. Safety – Since a tankless heater doesn’t hold water, it cannot leak or explode like a regular tank-style water heater (see also ‘ Can Your Water Heater Explode? ‘).
  9. Maintenance Free – You don’t have to clean out the tank or replace filters. Just make sure that you keep an eye on the temperature gauge and change the filter as needed.
  10. Longer Warranty – Most manufacturers offer warranties ranging from 5 years to 10 years.


In conclusion, a tankless water heater offers many benefits over a standard water heater.

Although they do require electricity, which may pose an issue during power outages, there are ways around this as we have described above.

A tankless water heater is a smart choice if you want to save money, conserve energy, reduce bottled water usage, and enjoy instant hot water whenever you need it.

Tankless water heaters are becoming increasingly popular due to their many benefits.

The best thing about these systems is that they eliminate the hassle of having to purchase large amounts of water each month.

This allows homeowners to save money and cut down on their monthly utility bills. 

In addition, since tankless water heaters don’t store water, you’ll never have to worry about running out of hot water when you’re not home. Finally, they also allow you to enjoy instant hot water when you need it.

Frequently Asked Questions

How Much Does A Tankless Water Heater Cost?

The price of a tankless water heater depends on the brand and model. Some brands sell at prices between $500-$1000.

What Size Should I Get?

As mentioned earlier, most tankless water heaters come in two sizes: 20 gallon and 40 gallon.

If you plan on installing one in your home, it would be best if you opt for the larger version since it will save you money in the long run.

Can I Install My Tankless Water Heater Myself?

Yes, although you might want to hire someone to help you install it properly.

Will My Electric Bill Go Up When I Install A Tankless Water Heater?

This question has been asked by many homeowners. In fact, some people even think that installing a tankless water heater could increase their monthly bills.

But the truth is that installing a tankless unit will actually reduce your monthly utility costs because it uses less energy than a conventional water heater.

Are Tankless Water Heaters Safe?

Yes! Tankless water heaters are completely safe. There is no danger of explosion or fire.

What Kind Of Maintenance Should I Expect?

Like all other appliances, tankless water heaters (see also ‘Water Heater Repair Cost Guide‘) also need periodic maintenance. Make sure that you check the manufacturer’s instructions before doing anything.

Is It True That Tankless Water Heaters Are More Expensive Than Conventional Ones?

Tankless water heating systems are not more expensive than traditional models. In fact, they are quite affordable.

Which Type Of Tankless Water Heater Should I Buy?

It really depends on what you prefer. For example, if you like the idea of controlling your water temperature with a thermostat, then you should consider buying a programmable tankless water heater (see also ‘Richmond Tankless Water Heaters Review And Buying Tips‘) .

On the other hand, if you don’t mind having a constant hot water supply throughout the day, then you should probably opt for a non-programmable tankless water heater instead.

Should I Buy An Under-The-Counter Tankless Water Heater? Or Should I Install It Above Ground?

Under-the-counter units are usually installed inside the kitchen cabinets. While this may look attractive, there are several disadvantages associated with them.

First, they take up valuable space in the kitchen. Second, they are difficult to clean. And third, they are prone to leaks.

So unless you have enough room in your kitchen, it would be better to install your tankless model outside the house.

How Much Does A Tankless Water Heater Cost?

The price of a tankless water heater varies depending on its features, size, brand, and so on. However, most manufacturers offer free installation services.

So make sure you ask about these offers when shopping for a new tankless water heater.

How Long Do Tankless Water Heaters Last?

Most tankless water heaters come with a warranty period ranging from 3 to 5 years.

Can I Use My Existing Gas Line To Connect My Tankless Water Heater?

Yes, you can. Just make sure that the pipe diameter matches the one used by your current unit.

Are Tankless Water Heaters Eco Friendly?

Yes! Tankless models are environmentally friendly because they use less electricity compared to conventional models.

Does A Gas Tankless Water System Work In Cold Weather?

A tankless water heater works just fine in cold climates. You can keep your home warm during winter months without worrying about running out of hot water.

author avatar
Anthony Barnes
Anthony Barnes is the founder of Water Heater Hub and a second-generation plumber by profession. Before developing Water Heater Hub, Anthony Barnes was a full-time plumber, and he has undertaken a wide variety of projects over the decades. As a second-generation plumber, it was easy for Anthony to get used to the technicalities of all from a tender age


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