How To Charge Solar Batteries With Generator [Details Guide]

Having power is one thing, but keeping it on and running is even more crucial, primarily in emergencies and cases when the batteries drain. This often begs the concerns of how to charge solar batteries with a generator.

Reasonably, you might not even need to have a solar generator to pull off this smart and thoughtful hack. This guide provides clear answers about the best ways to connect solar batteries to a gas-powered generator.

Can You Charge Solar Batteries With A Generator?

If you have a developed generator, you can charge solar batteries; you will most likely need an inverter to accomplish this task. Still, once you have the parts, the procedure is as easy as it gets. Then, quite directly, you can plug in and charge directly with no burden.

Can You Charge Solar Batteries With A Generator

If you use solar, wind or micro-hydro to charge your batteries, the three charging methods are great. Still, in using the generator, you should simply be operating a bulk charge, and this is mainly because the aim is to charge the solar batteries using a small amount of fuel as possible.

You can again use a gas generator to recharge a solar battery if you have access to a battery charger. The generator generates the AC power. This in turn is essential for the solar battery. The system then converts the AC power to DC power to charge the battery.

How To Charge Solar Batteries With A Generator

Sometimes, the sun just isn’t going to scrape it. Besides, your system can have other automated downfalls. Fortunately, with the right simple device and appliance, you won’t have to worry about the dark days ahead because your solar batteries will be available most of the time.

How To Charge Solar Batteries With Generator

To accomplish this, all you need is a small inverter. This is a plug-and-play activity. Attach your inverter to your generator, and then plug in your solar batteries to charge. After that, it is only a matter of time before your batteries are reading full power.

A WEN 56203i Super Quiet Portable Inverter Generator comes in handy when it comes to charging solar batteries. Portable and quiet generators weighing only 39 pounds are available. Furthermore, before shutting down, the efficient fuel shutoff uses up the extra fuel in the carburettor. This helps to extend the life of your generator. And so the issue of how to charge solar batteries with a generator is answered. You also get a one-year warranty, so you can put this generator through its paces without worry.

How Long Does It Take To Charge Solar Batteries

It takes a 200-watt solar panel that generates 1 amp of current between 5 and 8 hours to charge a 12-volt car battery. Charging time depends on numerous factors like the quality of solar batteries that are being used and the efficiency of the charge controller. The state of the battery and the amount of sunlight absorbed by the solar batteries are also factors to consider.

The entire charging time will alter, depending on the battery’s state. For example, a generator can charge the batteries within six to eight hours if fully drained. We have listed the various charging phases to provide a more thorough description of how long it would take to charge a deep cycle battery.

Stages of Charging

  • The voltage output is outlined and transferred to the battery in this stage. The controller maintains a constant voltage level. When the bulk stage is finished, the voltage drops.
  • As the voltage levels fall, the internal resistance of the battery rises till the battery has reached its maximum capacity.
  • The battery is almost fully charged, and upkeep comes into play.  The controller will permit enough current to flow into the battery to keep it charged.

How to Determine the Recharge Time of a Deep Cycle Battery

The overall charging time will be determined primarily by the capacity of the battery and the power rating of the energy resources used to charge the battery. That is, you must be aware of the following parameters: wattage, voltage, and amperage.

How to Determine the Recharge Time of a Deep Cycle Battery

What Exactly Is Wattage?

The wattage of a solar panel signifies how much power it can produce in optimal state. Factors like direct sunlight and warm temperatures should be taken into account.  A 200-watt solar panel should ideally have a power output of 200 watts. However, it is not as clear-cut as that.

What Exactly Is Voltage?

In a nutshell, voltage corresponds to the pressure exerted on the current. Therefore, voltage is the amount of electrical potential stored in your battery. Voltage is measured in volts (V).

What Is an Amp Hour (Ah)?

Amp-hours are an essential concept to understand. Amp-hour is a type of categorization that is used to describe the amount of power that a given battery can provide in one hour. Deep cycle batteries are classified according to their amp-hour capacity using an Ah number. You can calculate the amp rating for your 200-watt solar panels if you know the Ah rating of your 12V battery. Likewise, you can calculate how long it takes to charge your 12V battery if you know its amp rating.

The Method

To calculate the current produced by your solar panels in amperes, use the formula:

Power / Voltage = Amps

Safety Tips While Charging Solar Batteries

Because batteries are unsafe, adequate safety precautions must be taken whenever you are near The bank. Wear thick gloves and safety goggles, and avoid using any metal materials. You don’t want to be burned by acid. In the event of an acid leak, keep some baking soda and water close to the batteries so that the acid can be neutralized.

Safety Tips While Charging Solar Batteries

Sulfation, in which sulfur crystals form on the lead plates of the battery and prevent chemical reactions, is responsible for around 80% of failures. Sulfation happens when the battery’s charge or electrolyte level is low. Because of the risks linked with sulfation, it is critical to regulate, maintain, monitor and these two variables in flooded batteries.

The following are vital methods that should be adhered to and obeyed strictly when charging solar batteries with the generator.

  1. Never permit the connection of both terminals with an item.
  2. Don’t use bare hands as it leaves you in danger if the battery drops or shifts. Also, reaching for the battery is dangerous, leading to electrical shock.
  3. Practice careful and proper lifting methods. For example, do not use exposed hands to touch the battery.
  4. When batteries are mishandled, they can be extremely dangerous. They are large and heavy objects that, if dropped, can cause serious injury and damage, and they are also extremely corrosive. It can cause severe burns to the skin and corrode appliances that comes in contact. Touching batteries without the appropriate gear and practice can also result in high-voltage electrocution.


There’s no need to bother about your solar batteries running low if you have a generator and an inverter. Learning how to charge solar batteries with a generator should be simple.You can have all of your home and office devices running. Simply follow the guidelines in this article.

David Binion

Hi, I am David Binion, I am a technical assistant of a solar panel manufacturing company. I also have a solar panel selling and service providing shops beside my job. Because of my job & business, I have to face so many clients of the power tool users.

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