Electric Generator Battery: 6 Important Answers for Beginners

Electric Generator Battery: 6 Important Answers for Beginners

Electric generators have batteries! This may be insane for non electrical workers. However, I have found some important questions about generators batteries, I decided to answer these questions. Let’s get started.

Why does an electrical generator need battery?

Batteries are an integral component of the generator‘s set. The primary function of an electrical generator battery is to provide the engine start-up of the generator with energy when a power interruption occurs.

Based on configuration is used in the generator system, batteries may also be able to provide:

  • Power supply to electronic control panel
  • During generator operations, batteries may supply electricity to the other pane small motors that operate using DC current and any DC-connected device inside the enclosure.

The battery plays a vital role in sensing when power is cut off so that the engine can begin to run immediately after a power outage. Electronic components need to be operated as well; it’s just like the car battery; it plays a role in generator operation. The generator starts with the battery since it would not begin without it.

During maintenance of generators, the battery is among the components checked to ensure that it’s working in good working order. If it becomes weak, your generator technician will inform you that it’s time to change the battery.

If you have the batteries working correctly, you can assure that it will turn on the generator when power is cut off.

Types of batteries used in Electrical Generator Systems:

Most generator sets utilize the standard lead-acid battery. There are two kinds of batteries:

Maintenance Free: is Sometimes called a sealed battery. It cannot add electrolytes or even check the specific gravity of the battery.

Conventional: cells come with separate caps for filling with electrolytes and testing them.

How Does a Generator Charge its Own Battery?

We have portable generators in my workplace, The charging system is a simple Dynamo (DC generator, like the one in you car) that is directly connected to the batteries. It charges the batteries when the generator is working. If the generator is stand by, then we use a separate charging supply to keep the batteries charged.

However, Some Generators have two types of charging system, with the capability of charging, which performs two functions:

1. Recharge the battery

2- Generates current during operation

Two types of charging system generators employed are a DC charging system and an AC charging system. Both generate the alternating current, but the difference lies in converting the AC into a direct current (de) to charge the battery.

Dc Charging System: A dc charging device has a generator and a regulator. The generator generates electric power and rectifies the electrical current using brushes and commutator bars.

The regulator has three functions:

(1) It shuts and opens the charging circuit.

(2) it stops overcharging of the battery as well.

(3) it restricts the output of the generator to safe levels.

Ac Charging System: An AC charging system comprises two components: an alternator and a regulator. Its alternator is an AC generator. As with generators, it also produces an AC current, but it rectifies it electronically with the help of diodes. They are generally smaller than generators with equal output and greater current output at lower engine speed. The regulator of an AC charging system limits an alternator’s current to a safe set amount.

The charging system operates in three steps:

  • while starting, the battery provides the entire load current
  • when the generator is operating at its peak during peak operation, the battery assists the generator to supply current and
  • in regular operation, the generator provides all current and charges the battery.

In both systems of electrical power, the battery is the one that initiates the electrical circuit that provides sparks to start the engine. The engine is then driven by the alternator or generator that generates current to control lighting, ignition, and other loads.

The battery also helps the alternator or generator in peak operation times when electrical loads are high. However, once the engine is running, the generator and alternator are the “work horse,” providing current to the ignition and other circuits. Likewise, generators supply current when the engine is in motion and operating. If the engine slows down or stops, the battery will take most of the burden.

Why my generator not charging the battery reasons and solutions

if the generator is not charging the battery, all possible reasons are mentioned below:

Battery Itself Is the Problem

If a generator fails to recharge the battery, we accuse the generator. But the generator isn’t always the cause. The factors that could stop batteries from being charged are:

Batteries have a short lifespan. They’re not built to last forever. So, if the battery you have is old or in the case of a defective cell, you can’t believe it will keep its charge for an extended duration.

Also, think about the possibility that your generator could charge the battery. However, the battery may not maintain the charge. Instead, it continues to charge at a constant rate even when the generator operates.

The generator is In Storage for A Long-time

If the generator is put in storage for an extended time, the battery can discharge at that end; it cannot be recharged furthermore. In the absence of a regular charge, you’ll decrease the battery’s capacity and lifespan and reduce its capacity to maintain its charge.

Faulty Charger

The generator charger could stop it from charging your battery. Unfortunately, charger problems are not easy to identify because they may appear from various angles.

Some generators have cables running between the battery and the generator. that become faulty sometimes; you must purchase and install these cables following the directions in the manual to allow your generator to recharge the battery.

However, that’s not always the problem. Generators can also be affected if their chargers are defective. For example, a defective charger could stop that generator from charging its battery.

Malfunctioned Voltage Regulator

Many people don’t realize how it is the voltage regulator is an essential component during the process of charging. This device determines the amount of power that is delivered through the battery.

In addition, it makes sure that the voltage flowing from the alternator is sufficient to recharge the battery. If the voltage regulator fails and the battery stops charging. It may also begin to drain at a faster rate.

Tripped Breakers & Fuses

Be sure to inspect the fuses and breakers. Tripped breakers or mangled fuses could affect the generator’s capability to charge the battery.

Generators can provide power to your home if some breakers are tripped. Unfortunately, many people are unaware of this. As a result, they do not think to examine the breakers and fuse as the generator continues to supply electricity to a few of their devices.

Solution to fix the Generator Battery Not Charging

To fix this “Generator not charging” issue, first identify the source of the issue. Then, the most efficient solutions are:

Replace The Fuse

This is the most straightforward problem to solve. If the fuse inside the transfer switch is blown, it is easy to replace it. If you’ve worked using electrical tools, the process shouldn’t take too long.

If the fuse does not seem to be the issue, then look at the breakers. A tripped breaker could hinder the generator’s ability to charge the battery fully.

Replace The Voltage Regulator

If your voltage regulator is damaged, then you should replace it. If not, the battery will continue depleting because the regulator can’t supply enough voltage to maintain its charge.

Replace The Old Battery

It is worth replacing the battery if you own an older generator, mainly if you do not use the generator regularly. If the multi-meter has told that your battery cannot keep its charge, purchase an upgrade. There’s no alternative in this instance.

How do you test generator battery?

Here we discussed two types of tests performed separately for Dry Batteries, also called maintenance free batteries and Led-Acid Batteries called electrolyte batteries.

Conductance Test (For Maintenance Free Batteries):

For most conductance testers, you will see the voltage reading and the light green/red, or pass/fail. The typical voltage for a 12-volt battery is 12.6 volts. Consistency is the key to indicating the health of the battery. When conducting conductance tests monthly, it will become apparent that a pattern is emerging.

If you notice a noticeable decrease in voltage during testing every month, the battery is damaged and requires replacement. The inspectors will be looking for voltage fluctuations or a failure designation in the test report. It is crucial to remember that temperature is integral in conductance readings.

If batteries are located outside, and in the open air, the temperature of the surrounding air when conducting conductance test must be recorded. If your tester displays Cold Cranking Amps, the reading should be in or close to the amperage stated by the manufacturer on the device.

If your tester shows a green/red or pass/fail rather than actual amps, note the results in your test record.

Hydrometer Testing (For Electrolytes Batteries):

Utilize a hydrometer to determine the exact gravity and level in charge for the sulphuric acid within the battery using following Method:

  • Do not add to the water that has been distilled.
  • Maintain the barrel is standing up. Inject enough electrolyte into each cell so that the float can glide around without issue.

Then, you should read off the hydrometer from eye level.

  • 1.270 to 1.280 SG Full Charge.
  • 1.220 to 1.230 SG Half Charge.
  • 1.150 to 1.220 SG Discharged.

The readings from each cell should remain within 0.030 points. If the deviation is more significant than 0.030, your battery probably requires replacement.

If all cells are consistently low, the battery could likely be able to be repaired, but we suggest replacing the battery immediately if it is feasible. All Battery maintenance is best done by a certified technician familiar with batteries.

Can you jump start a generator battery? (i.e., deadly battery)

Yes, we can jump start a generator battery. To get a generator jump start, you only need to correctly connect an external power source to the generator and then generate the power. Although the job may seem effortless and secure, you cannot be 100% certain of these aspects, which is why it is imperative to carry a safety kit at all times.

This kind of issue rarely appears to be serious. The positive side is that, in most instances, a tiny amount of electrical current will help you solve the problem. For example, this method starts a generator using the aid from an outside power source is referred to as “Jump Starting.”

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