Sump Pump Battery Backup vs Generator: which is right for you?


A sump pump is generally an “out of mind, out of sight” product since it is set up in the basement. It saves your home basement from over-flooding due to heavy rain or stormy weather. In fact, it provides peace of mind by protecting your valuables.

But on a rainy day or harsh weather conditions, load shedding is common. What if load shedding happens in your area for a prolonged period? Without electricity, the sump pump will stop operating, and your basement will become a mess.

In order to avoid this issue, either you have to install a Sump pump battery backup vs generator.

So, which one to choose?

Let’s look at the key differences between these 2 types.

Sump Pump Battery Backup vs Generator – What are the Key Differences

We will look into the pros and cons of each backup system. This will help us to make a wise buying decision.

Sump Pump Battery Backup – Pros and Cons

This is the most common type of sump pump that you will find in the market. It requires buying the pump itself along with the battery separately.

Run time

After installing a battery backup pump with a brand new battery, you will get 7 – 8 hours of service without interruption. Over time, the capacity of the battery reduces, and the working time starts reducing as well.

For example, a 3-year old battery gives 3 – 4 hours of backup during a power outage. It is crucial, and after 5-years significant reduction happens.


The lifespan of a battery backup sump pump is limited. Top-rated manufacturers advise replacing the sump pump battery after 3 years to get the best performance from the pump. If you don’t do so, the pump may malfunction too frequently, which is not good at all.

Pumping Rates

The power range of the battery backup sump pump is within ¼ – 1/3 HP. According to the pump’s power, the pumping rates range is 800 – 2000 GPH. The point to be noted is, this rate is only applicable for only new and fully charged battery backup sump pumps. After 2 – 3 years, this capacity reduces.


As stated earlier, you will find a battery backup sump pump in almost every store and home. Due to its availability, it is very popular among homeowners.

You will have to cost between $200 – $900 to buy the pump itself. Battery cost is excluded because you have to buy it separately.

The battery type is similar to a car battery, and most models require only one battery to run. Generally, the price range of a battery is $150 – $250.

Be noted that replacement is necessary every 3 years. So, the overall cost significantly increases over its lifespan.

Sump Pump Generator Backup – Pros and Cons

Who doesn’t love to get complete peace of mind? The house generator backup system is the complete answer.

Potentially Unlimited Run Time

Just after a power outage, a backup generator for the sump pump turns on the sump pump without late, allowing you to stay relaxed during a prolonged load shedding. You will remain worry-free that your sump pump will stop functioning and your home basement will flood.

A decent portable generator continuously runs for 12 – 16 hours.

A generator backup system is beneficial if you live in a load shedding prone area. This system saves you from basement flooding, and your home’s electrical equipment remains functioning.

But one drawback is, it won’t let your sump pump work automatically. A portable generator backup system works only if you’re around to connect it.

No Replacement

Sump pump generator backup is an ideal solution for many landlords because the time to time replacement is entirely unnecessary. Generally, house generator systems are reliable and long-lasting, and you will get many years of service from them.

As a result, it helps you to save valuable time, money, and effort.


In terms of cost, sump pump generator backup is a pricey choice. A good enough portable generator will cost you $500 – $1500. Some expensive options are also available which are good for industrial use. Since you require it for use at home, you shouldn’t spend too much money.

One thing you need to keep in mind, if you decide to install a whole generator system, consider installing 2 electric sump pumps alongside it. Thus, if any of the sump pumps stop functioning for any unwanted reasons, the other one starts operating quickly, and there will always be a working sump pump in your basement.

Final Thought

When comparing sump pump battery backup vs generator, remember, both choices have their benefits and drawbacks.

Also, whatever model you choose, make sure it meets your requirements. Moreover, the service life of a sump pump depends a lot on care and maintenance. Since you can’t invest in battery or generator backup from time to time, periodic maintenance is mandatory.

So, which model do you prefer? Do you have any other queries? Let us know by contacting us!

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