Last Updated on April 15, 2023
Are you wondering which power source is more suitable for your sump pump, a battery backup system, or a generator? Many homeowners face the same dilemma regarding keeping their basements dry.
At first glance, both solutions seem similar, but some key differences between them can make a big difference for sump pumps. A battery backup system may be more compact and portable than its generator counterpart.
While batteries are powered by electricity, most generators run on gasoline, diesel fuel, or propane gas.
Let’s look at the key differences between sump pump battery backup vs generator to decide what’s most suitable for your home. All these factors will be covered, from cost and maintenance to fuel availability and environmental impact. So read on to find out which option will fit your needs right.
Sump Pump Battery Backup Vs Generator: 10 Differences
When shopping for a sump pump backup system, knowing the distinguishing features between battery and generator options is vital. Here are the key differences between the two:
01: Power Source
A battery backup runs on electricity stored in a rechargeable battery, while a generator is powered by fuel such as gasoline, diesel, or propane. This means the battery backup will draw its power from an electrical outlet, while the generator must be manually refueled to produce power.
Battery backups have the advantage of being more reliable since they do not require manual fuel refilling. Still, generators are generally more powerful and can provide more energy for larger sump pumps.
02: Portability
Battery backups are typically smaller and more portable than generators for powered sump pumps, making them suited for places where mobility is essential. Generators can be quite heavy and may require additional equipment like wheels or trailers to transport them.
Due to their lack of moving parts, battery backups are often quieter than generators. This makes them better suited for locations where noise might be an issue.
03: Cost
An important factor when evaluating these two options is cost. Generally speaking, battery backups are less expensive than generators when powering a sump pump.
This is because the up-front cost of purchasing a generator can often be prohibitively high compared to a battery backup system. Also, ongoing costs associated with running and maintaining a generator should be considered when comparing prices between the two options.
04: Maintenance
Another notable difference between battery backups and generators is the amount of maintenance each requires to operate properly for powering a sump pump.
Deep cycle battery backups typically require little maintenance because they don’t have any moving parts. Generators may need regular oil changes and refueling to keep them running efficiently over time.
Also, depending on how often it is used, some parts may need to be replaced periodically on both systems to ensure optimal performance.
05: Fuel Availability
A battery backup system is an efficient and reliable way to power a sump pump during a power outage. Unlike a generator, it does not require fuel and will continue operating indefinitely while connected to an AC outlet, provided the battery remains charged.
Furthermore, in comparison to a generator, it is more nature-friendly as no exhaust or toxic fumes are produced. This makes it ideal for use in areas where access to fuel might be limited or during natural disasters when supplies may be scarce.
06: Noise Level
The noise level of a battery backup system for powering a sump pump is virtually inaudible. The lack of loud sound ensures that there will be no disruption or distraction for any nearby residents or businesses.
On the other hand, generators are quite loud when running and can create significant disturbance in residential areas or places of business. Also, due to their size, they can take up quite a bit of space and can prove difficult to transport from place to place when needed.
07: Duration of Power Supply
Battery backups typically provide power for several hours depending on the size of the battery and the wattage load required by the sump pump. It’s essential to remember that once the battery runs out of energy, it must be recharged before it can run again.
On the other hand, generators can provide power for days on end as long as fuel is available. This makes them more suitable for extended outages or natural disasters where access to resources may be limited.
08: Installation
Homeowners have different options when installing a battery backup or generator for powering a sump pump.
Installing a battery backup is typically easy and can be completed with minimal effort, time, and cost. The installation requires connecting the battery to the existing electrical system in the home and does not require any specialized tools or expertise.
On the other hand, installing a generator for powering a sump pump usually requires professional assistance due to its complexity. Generators must be wired into the home’s electrical system and may require additional components like transfer switches and exhaust systems that professionals best install.
09: Environmental Impact
There is a clear difference when comparing the environmental impact between a backup and a generator. Battery backups use stored electricity from renewable sources like wind or solar power pumps when electricity is interrupted.
This eliminates emissions from fossil fuel combustion while providing reliable backup power during outages. Conversely, generators burn oil or gas to produce electricity, releasing emissions into the air that can affect air quality and contribute to global climate change.
10: Application
Battery backups and generators can provide reliable backup power during outages, but their applications differ significantly. Battery backups are most commonly used for sump pumps because they’re designed specifically for this and don’t take up much space.
Generators are more versatile than battery backups since they can power multiple devices. In contrast, they often require larger areas for installation and more money for fuel costs than batteries do.
What Specs Should You Look For in A Sump Pump Deep Cycle Battery?
When shopping for a deep cycle battery for your sump pump, you’ll want to consider a few key specs. Battery capacity, or ampere-hours (Ah), is essential as it determines how long the battery will last. Generally, a higher Ah rating is better.
Voltage also matters. You’ll need a battery that matches the voltage of your sump pump. Common types of deep-cycle batteries are lead-acid and AGM. Each has pros and cons, so be sure to do further research before purchasing.
Reserve capacity is another crucial spec, as it lets you know how long the battery can operate when running on its own power. Cold-cranking amps (CCA) rate how quickly the battery can power up in cold weather conditions.
Cycle life determines how often the battery can be discharged and recharged until it reaches its end. This should be considered when selecting the right battery. Lastly, size and weight should also be considered since most sump pumps are in smaller spaces.
Use a smaller, lighter battery that provides enough ampere-hours for your needs whenever possible. While heavier batteries need stronger support structures during installation, some brands perform better than others.
If you would like more information about which deep cycle battery may better suit your needs and budget, check out our blog on the best deep cycle battery for sump pumps.
Can You Use a Battery Backup Instead of a Generator to Power a Sump Pump?
Battery backup systems are becoming increasingly popular for powering sump pumps due to their convenience and reliability. Unlike generators requiring regular maintenance and refueling, battery backup systems can be left unattended without worrying about running out of power or failing.
A battery backup can also protect against power outages, as they can continue running even during an outage. Aside from that, battery backups are typically much quieter than generators, allowing homeowners to use them without the disruption associated with generator noise.
How Many Years Does a Sump Pump Battery Last?
The life of a sump pump’s battery depends on several factors, including the frequency of use, the overall quality of the device, and how well it is maintained. Generally speaking, batteries should be replaced every five years to keep the system operating efficiently and effectively.
During regular checkups, homeowners should pay close attention to the battery indicator light. If it remains green consistently over time, it usually indicates the battery functions correctly.
Also, many modern-day sump pump systems come equipped with audible alarms that alert homeowners when it is time to replace or recharge their batteries.
Is a Battery Backup Sump Pump Needed If a House Has a Generator?
While it is true that having a generator in the home will provide some backup power, you cannot rely solely on it to operate the sump pump in case of an extended blackout.
A generator may be unable to supply enough continuous energy to keep the sump pump running for hours, depending on its size and output capacity.
Furthermore, suppose there are any issues with the generator starting or running for prolonged periods without electricity. In that case, this could also lead to flooding in the basement due to insufficient pumping capacity from the sump pump.
Therefore, a whole-house generator and battery backup system will help guarantee that your basement stays dry during periods without electricity.
Decide on Your Sump Pump Power Source: Battery Backup or Generator?
When choosing a power source for your sump pump, understanding the differences between a battery-powered backup system and a gasoline-powered generator can help you make an informed decision.
Battery backups tend to be more compact, less noisy and are ideal when access to fuel is limited or in cases where a longer duration of use isn’t necessary.
On the other hand, generators offer more power, come with larger tanks that allow them to run much longer than batteries, and are ideal for homes that need extended coverage against power outages.
Ultimately, your chosen solution depends on your needs, budget, and access to fuel sources.
