Check on Your Generator Batteries this Spring
- by Joe Weber - updated on 3/11/2024
In many parts of the country, spring is storm prep time. Severe weather of all types will strike in different parts of the US. From blizzards to tornadoes, the United States will see it all.
Did you know that your home backup generator may have a battery? Keep reading to learn the importance of keeping tabs on your battery so you can see the signs of a weak battery before it's too late.
What Is A Generator?
It seems like a simple question but one that we should investigate. A generator is an electrical device that converts mechanical energy into electrical energy. They are generally powered by gas, propane and even diesel engines. They are often used on construction sites and as a home backup energy source.
How does a generator work?
In a generator, the engine drives a rotating shaft connected to the rotor, essentially an electromagnet with wire coils. This rotor spins within the stator's stationary magnetic field, created by electromagnets housed within a fixed cylinder. Think of it as the rotor "stirring" the magnetic field, creating an electrical current like ripples in water.
This cutting of the magnetic field induces an electric current in the rotor's coils, generating electricity that can be used to power all sorts of electronics from tools to appliances.
What are Generator Batteries?
It's worth noting that not all generators need a battery. Generators that don't need a battery are called direct current (DC) generators and have a self-contained starting system that doesn't require an external power source. If you recently bought or already own a generator, it is likely an alternating current (AC) generator with a battery. This is the most common generator on shelves today.
Like your car, your electronic ignition generator will not start without the battery. The battery in a generator will have two primary purposes, to provide power to the starter to get the engine running and to provide power to the digital controls and other components like USB ports and lights.
Importance of Routine Battery Inspections
You've heard from us countless times about maintaining your car battery. Your generator battery is no different. Keeping tabs on your battery regularly throughout the year is quick and easy, and you will be rewarded for your efforts with easy starts every time you need to use your generator.
If you neglect the battery you will have to deal with the consequences which will almost always leave you stranded without your backup power.
What to look for when inspecting your battery
- Visual inspection: Look for cracks, leaks, or swelling.
- Terminal condition: Check for corrosion, tightness and cleanliness. Remove any corrosion with a terminal cleaner and wire brush.
- Electrolyte level (flooded lead-acid batteries only): Ensure proper levels and top up if needed (refer to owner's manual).
- Voltage reading: Use a voltmeter to measure voltage, and compare it to recommended levels.
- Load test (optional): Assess battery health and capacity (professional help recommended, bring it to Batteries Plus and we'll test it for free!).
Signs of a Weak Generator Battery
Unlike the dimming lights or other common symptoms of a weak battery in a car, the generator doesn't have much to alert you to a failing battery.
A key indicator of a weak or failing generator battery is reduced cranking power or difficulty starting the engine. The best thing to do to stay on top of your battery health is to regularly inspect it as we detailed above.
How Do I Test Generator Batteries?
The testing process for larger generator batteries is the same as you would see for automotive batteries. Many generators actually use automotive batteries to power the engine and electronics. Smaller generators may use powersport or sealed lead acid (SLA) batteries. If you are unsure of the testing procedure for any battery, bring it to your local Batteries Plus to have it tested for free.
For detailed instructions on completing the testing process on larger lead-acid batteries, please read through our recent blog "How To: Test a Car Battery With a Multimeter?".
How Long Does A Generator Battery Last?
With proper care, your generator battery should last an average of 3 to 5 years. However, if you live in a hotter climate, use your generator frequently or don't maintain the battery, this time could be reduced.
How To Pick The Right Size Battery For Your Generator
Batteries Plus makes finding a generator battery as easy as breathing with our helpful fit finder. Just select the brand and model of your generator and we will present you with the best batteries that fit your generator.
The type and size of battery needed will also be presented to you in the generator's owner's manual. Another easy option is to look at the battery and search the original battery part number to find a replacement battery that matches the size, polarity and amperage that your generator requires.
Be Prepared and Stay Safe with Batteries Plus!
Keeping an eye on your generator's battery is important. When we need them, we need them. If your generator won't start on the job site, you're not making any money that day. If your generator won't start when the power goes out due to a tornado in the area, there is no A/C or furnace to keep you safe and comfortable.
Visit your local Batteries Plus, visit us online or give us a call to see how we can help keep your generator running when you need it most. We offer free battery testing too so bring in your generator battery and we will be happy to test it for you to see what condition it's in!
Are you in need of a generator? Don't forget to ask about the high-quality Champion generators available for you. Big or small, gas, propane or hybrid, Champion has a generator perfect for every demand.
Interested in some other form of backup power? Batteries Plus carries the trusted Goal Zero line of Yeti lithium power stations that you can use for anything from camping to home backup.