Why You Really Need a Battery Backup for Your Tankless Water Heater

Tankless water heaters are amazing. They give you hot water on demand, save space, and cut down on your energy bills. But there’s one catch: they need electricity to work. When the power goes out, so does your hot water. And trust us, you don’t want to be stuck with a cold shower in the middle of winter. A battery backup steps in during these power outages, keeping your water heater humming along and your hot water flowing. It’s like having an insurance policy for your comfort, ensuring that you and your family won’t be left out in the cold—literally.

What to Look for When Choosing a Battery Backup

Picking the right battery backup isn’t just about grabbing the first one you see. You’ll want to make sure it checks all the right boxes to keep your tankless water heater powered up when you need it most.

Compatibility is Key

First things first, not all battery backups play nice with every tankless water heater. It’s super important to check that the backup system you’re eyeing is compatible with your specific water heater model. This way, you won’t run into any nasty surprises when you try to hook it up. Manufacturers usually provide a list of compatible models, so give it a look before you hit the buy button.

Power Capacity: How Much Juice Do You Need?

Let’s talk power capacity—it’s how long your battery can keep the water heater running during an outage, measured in watt-hours (Wh). To decide what you need, check your heater’s wattage and how long you want it to last without power. Higher watt-hours mean longer run time, but also a higher cost. It’s all about balancing price and performance.

Types of Batteries: What’s Inside Matters

There are a few different types of batteries out there, and each has its own perks. Lithium-ion batteries are the most popular. They last a long time, are lightweight, and have a high energy density. They’re a bit pricier, but you get what you pay for in terms of performance and durability. Lead-acid batteries are usually cheaper, but they’re heavier and don’t last as long. They’re great if you’re looking for something more permanent and don’t mind the extra weight. Deep cycle batteries are built for long-term use and can be charged and discharged many times without wearing out too quickly. These are a solid choice if you think you’ll be using the battery a lot during outages.

Installation: DIY or Call in the Pros?

Some battery backups are pretty straightforward to install, even if you’re not exactly an electrician. Others, especially the more complex systems, might require a professional to set up. Think about how comfortable you are with handling electrical installations. Sometimes, spending a little extra to have a pro do it is worth the peace of mind.

Cost: What’s the Right Price?

Let’s chat about money. Battery backups come in all price ranges—from affordable to pretty pricey. While it might be tempting to grab the cheapest one, keep in mind that you’re investing in something that could save you a lot of trouble later on. Typically, spending a bit more gets you better features, more power, and higher reliability. So, find a price point that suits you, but don’t cut corners if it means sacrificing quality.

The Best Battery Backup Options for Tankless Water Heaters

Now that you know what to look for, let’s check out some of the top battery backup options that can keep your hot water running, even when the power isn’t.

Goal Zero Yeti 3000X Portable Power Station

The Goal Zero Yeti 3000X is a true game-changer with 3,032 watt-hours of lithium battery power. It easily keeps your tankless water heater running during outages and handles other energy-hungry appliances. Plus, you can charge it with solar panels, making it a versatile and reliable backup option.

The Yeti 3000X is portable, but it’s on the heavier side, so you might not want to move it around too much. It’s also one of the more expensive options, but if you need serious power, it’s worth the investment.

Tesla Powerwall

If you’re looking for something that can back up your entire home, including your tankless water heater, the Tesla Powerwall is a top-notch choice. This is a home battery that stores a massive 13.5 kWh of power, enough to keep your essentials running for hours, if not days. It integrates seamlessly with solar power systems, so you can keep it charged even when the grid is down.

The Powerwall is definitely an investment, both in terms of money and installation. It’s not something you can just plug in yourself—you’ll need a professional to set it up. But once it’s installed, you’ve got a powerhouse that will keep your home running smoothly, no matter what.

APC UPS 1500VA (BX1500M) Battery Backup

For those who don’t need the heavy-duty power of the Yeti or Powerwall, the APC UPS 1500VA is a solid, budget-friendly option. It’s designed for shorter outages and can handle smaller tankless water heaters with ease. With a capacity of 900 watts/1500 VA, it’s enough to keep your hot water flowing for a while without breaking the bank.

The APC UPS is also compact and easy to install, making it a great choice if you’re looking for something simple and effective. However, it’s not ideal for long-term outages, so keep that in mind if you live in an area where the power goes out frequently.

How to Install and Maintain Your Battery Backup

Once you’ve chosen your battery backup, getting it set up correctly is key to making sure it works when you need it most. Here’s how to get it done right and keep it running smoothly.

Installation Tips

Whether you’re a DIYer or prefer to call in a professional, installation is all about making sure everything is connected properly. If you’re going the DIY route, read the instructions carefully and double-check that your backup is compatible with your water heater. Choose a location that’s easily accessible but away from extreme temperatures, which can affect the battery’s lifespan.

If you’re installing something like the Tesla Powerwall, professional installation is a must. It’s complex and needs to be integrated with your home’s electrical and possibly solar systems.

Maintenance Advice

After installation, you’ll want to keep an eye on your battery backup to make sure it’s always ready to go. Regularly test the system by simulating a power outage and checking how long it keeps your water heater running. Most systems will have indicators or apps that let you monitor the battery’s health and charge levels, so use those tools to stay on top of things. And remember, if your battery starts showing signs of wear, it’s better to replace it sooner rather than later.

If you’re using a portable battery backup like the Goal Zero Yeti, store it in a cool, dry place when it’s not in use to extend its life.

Safety Considerations

Keeping safety first is super important. Make sure your battery backup has plenty of ventilation to avoid overheating, which can be a fire risk. When it’s time to get rid of an old battery, make sure to dispose of it the right way according to your local rules. Batteries have chemicals that can be bad for the environment, so don’t just throw them in the trash.

Wrapping It Up

Getting a reliable battery backup for your tankless water heater is a smart move. It ensures that even when the power goes out, your hot water doesn’t. By choosing the right backup system, installing it properly, and keeping it well-maintained, you can enjoy uninterrupted hot water no matter what. Whether you go for a portable option like the Goal Zero Yeti or a whole-home solution like the Tesla Powerwall, the peace of mind that comes with knowing your home is prepared for any power outage is priceless.

FAQs About Battery Backups for Tankless Water Heaters

How long can a battery backup power a tankless water heater?

The length of time a battery backup can power your tankless water heater depends on the battery’s capacity and your water heater’s wattage. For instance, a high-capacity battery like the Goal Zero Yeti 3000X can keep your water heater running for several hours during an outage.

Can I install a battery backup myself?

Some battery backups are designed for DIY installation, while others, like the Tesla Powerwall, require professional installation due to their complexity and integration with your home’s electrical system.

What happens if the battery runs out during a long outage?

If the battery runs out during a prolonged power outage, your tankless water heater will stop working until the battery is recharged or power is restored. Having a solar-compatible battery backup can help extend usage during long outages.

Are there warranties on battery backup systems?

Yep, most high-quality battery backups do come with warranties. Take the Tesla Powerwall, for instance—it’s backed by a 10-year warranty. Other brands might offer warranties that range anywhere from 2 to 5 years, depending on who you go with.

Can a battery backup power other appliances in my home?

Absolutely! Many battery backups, especially the larger ones like the Tesla Powerwall, can power multiple appliances in your home. Just make sure to check the total power capacity to ensure it meets your needs.