Charging a solar panel is one of the hardest things right now if you do not have the right materials and tools to do so.

A solar panel charge battery is a great way to use solar energy that is renewable and saves a lot of power, time, and money. 

All you need is to install a solar charger to get started. It is transferred to the battery and the solar panels make use of the energy to charge it up.

Similarly, these batteries take almost 5-6 hours in a day to get fully charged.  

And you can choose to go off-grid with the solar system. It is transferred to the battery and you will have to catch up with the best power from the national power grid system.

The solar panels produce immense energy and can last up to 4-5 days with just one time of charging. 

You need to charge a battery from a solar panel if you plan to get into the solar system.

This is an easy process that will have no damage to the batteries and will take hardly any time to do so.

You will need to check the back of the panel for the right wattage. You might see that 300W lists the charging of the back of the solar panels. 

How To Charge A Battery From Solar Panel?

The solar panels are designed quite effectively. It is used to produce the power than the voltage and they are rated as high as possible.

It takes almost 12V output, which might actually overcharge the damage under ideal conditions. 

If the solar panel produces more power than the battery, divide the voltage of the battery according to the solar watt. It can multiply the charger controller that is rated up to 30 amps. 

Often the charger controllers will be rated in multiples of 30 amps, you might take it to round up to the next move of highest ratings and cover up the solar panel to charge faster. 

This content will teach you the methods and processes that are needed to get started and know about how to hook up solar panels to RV batteries. You need to be sure about the energy grid along with the source. 

Choosing the MPPT charge controller is the best for efficiency. And, the PWM regulates the maximum voltage that the solar panel sends to the battery.

Harnessing solar energy in panels is one of the cost-effective and decreasing significant options with the progression of technology. 

Do You Know: How To Build A DIY Solar Generator

Materials Required- 

  • Solar panel calculator
  • 100 watt 12-volt solar panel
  • 12-volt battery
  • Renogy Wanderer 30A solar charge controller
  •  Inline fuse holder with 20 amp blade fuse
  • Heat shrink tubing & gloves 
  • Safety glasses
  • 12 gauge wire of 12
  • 12 gauge wire connectors
  • Cables of MC4 solar adapter 
  • MC4 cables of solar extension
  • 15 amp inline fuse MC4

Tools Required-

  • Screwdriver
  • Wire Stripper
  • Wire cutter
  • Wire stripper
  • Heat gun 

Best Methods How To Charge A Battery From Solar Panel.

How To Charge A Battery From Solar Panel?

Method:1  Leave the connector and the battery until it is charged 

  • The length of time takes to charge the battery is highly recommended 
  • The charge connector ceases the flow of the energy to the battery once done 
  • Leave the charger until it is needed 
  • Here you will get to see a digital display
  • Once you notice output dropping, it is likely to create a battery to close down and fully charged 

Method:2  Go through the output of the charge controller 

  • Charge connectors help in communicating the app and monitoring the voltage from the tablet and smartphone 
  • Multiple charge connectors have a digital screen that shows the output flowing from the battery 
  • If the reading is 0, double-check everything that is hooked 
  • Connect the wires with the controller to the solar panel with MC4 wires 
  • Connect male connector to female connector and do the reverse
  • Double-check the positive and negative cables with matching up of correction 

Method:3 Connect the MC4 connectors to the charge controllers 

  • Use the MC4 connectors with the connection of the wires to that of the charge controller 
  • Find the connectors whenever electrical and solar supplies by attaching them to wires 
  • Connect the wires from the controller to the solar panels 
  • Click when the connectors are seated securely 
  • Output wires on solar panels are fitted with the MC4 connectors with the long fitting and cylindrical connectors 
  • You must first look into what size solar panel to charge the 12v battery before attaching the wires. 

Method:4 Try to slide the wires end into the input of charge controllers 

  • Check the end of the wires and plug them into the charge controller 
  • Take care to connect the negative cables to the positive cables 
  • If you connect the 12V battery, you can use the 10 gauge and 16 gauge wires effectively 
  • In order to prevent sudden damage to the charge controllers, 
  • you must connect the solar panel attached to the new wires along the battery first 

Method:5 Put the solar panel in the direct Sun Rays 

  • Put the solar panel in the direct heat of the sun after the panel is ready 
  • In the mine, there is a flash of light that the battery is charging normally 
  • Once placed under the sun rays, you will see the charge controller indicate the battery when put into charge 
  • First, connect the negative solar cable and charge controller followed by the second 
  • The charge controller turns on the light up to indicate that the panel is properly connected 
  • The connection of the battery along with the charger leads to programming the charge controller for your battery type and voltage

Also Check: Things To Know About Solar Panels On Flat Roof 

How Long Does It Take to Charge a Battery from a Solar Panel?

How To Charge A Battery From Solar Panel?
  • Use the solar panel charge time calculator to figure out the real-time
  • If it is a 100 W solar panel then it will take 2 to 4 hours 
  • If it is a solar panel of 300W or 330W it will take 3-4 hours to get fully charged 
  • If you have a solar panel of 400W or even more, you will have to wait for a 1.5 to 2 hours 
  • For better charging, it is best to directly hook the solar panels to the battery

What do you need?

  •  12V, 33Ah lead acid battery
  •   50% battery depth of discharge
  •   100-watt solar panel
  •    PWM charge controller

If you are asking about how long solar panel batteries last then know that you can go for an average lifespan of 5 to 7.5 years for lead-acid and 11-15 years for lithium-ion batteries. 

Frequently Asked Questions

Q1. How do you charge a 12-volt battery with a solar panel?
Ans1. You can connect the 12v battery to the charge controller. Once you insert the stripped end of the negative battery cable into the negative battery cable you will be able to check the terminal on the charge controller. 

Q2. How do you charge a rechargeable battery with a solar panel?
Ans2. If you have a bit of knowledge of electronics, you will definitely know how to charge a rechargeable battery with solar panels including the Powerfilm SP3-37 to charge rechargeable AAA or sometimes AA to other size batteries. 

Q3. How big of a solar panel Do I need to charge a 12V battery?
Ans3. Charging a 12V battery will need 20 amps and 240 watts. So, we should recommend using a 300 W solar panel or 3X100 W panels to charge the batteries. 

Read More: Industrial Solar Energy Systems Advantages For Business