Course Content
Solar and Inverter Insallation
A solar and inverter installation involves mounting solar panels, connecting them to the inverter, and then wiring the inverter to the battery and/or the grid. Key steps include securing the panel mounts, attaching the panels at an optimal angle, and using appropriate connectors like MC4s to link the panels to the inverter. Finally, the inverter must be properly grounded and connected to a battery (for energy storage) and a main electrical panel or consumer unit, with all electrical codes and manufacturer instructions followed.  1. Prepare the site and install mounts Set up any necessary scaffolding and safety equipment. Install mounting brackets for the solar panels, securing them to the rafters or structure according to the manufacturer's instructions. Ensure panels will be positioned at an optimal angle for sun exposure.  This video demonstrates how to install solar mounts and panels, including 2. Install the solar panels Mount the solar panels onto the installed brackets. Ensure all bolts are tightened securely. Position the panels to maximize solar energy capture.  3. Connect electrical wiring  Connect the solar panels to each other, often in a series, using compatible connectors like MC4s. Route the DC wires from the panels to the inverter's location. Double-check that the total voltage and current from the panels are within the inverter's specifications.  4. Connect the inverter Securely connect the DC input wires from the panels to the correct terminals on the inverter, following the manufacturer's instructions. Connect the solar inverter to the battery bank using appropriate wiring. This allows for energy storage and use during cloudy times or at night. If your system includes a charge controller, connect it according to the manufacturer's instructions, which may be housed in a control panel along with isolators. Connect the AC output of the inverter to the consumer unit or main electrical panel, which will then distribute the power to your home. Install a meter to monitor the electricity generated.  5. Finalize and test the system Ensure the inverter is properly grounded to prevent electrical hazards. Double-check all connections for security and correct polarity. Follow local electrical codes and regulations for the entire installation. Once all connections are confirmed, turn on the power supply to test the system. 
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Training on solar and inverter| How to Size Breakers Between Inverter, Battery, and Loads
06:38
How to Size Solar Charge Controller
16:29
How to Size a Solar Power System for Your Home (DIY)
19:00
Solar and Inverter Installation
To size a solar charge controller, first determine the total wattage of your solar panels and your battery bank’s voltage. Then, calculate the required amperage using the formula: (Total Solar Panel Wattage) / (Battery Voltage) x 1.25. The 1.25 factor is a 25% safety margin to account for peak performance and potential losses. Finally, choose a controller with an amperage and voltage rating that meets or exceeds your calculated needs and matches your solar array’s maximum input voltage 
Step 1: Gather information
    • Total wattage of solar panels: This is the sum of the wattage of all your panels. 
       
       

      Battery bank voltage: Common voltages are 12V, 24V, 36V, or 48V. 

       
 
  • Maximum input voltage (Voc) of your solar array: This is the open-circuit voltage of your panels, which is listed on the panel’s datasheet. 
     
    Step 2: Calculate the required amperage 
 
  • Use the following formula: Required Current (A) = (Total Solar Panel Wattage / Battery Voltage) x 1.25. 
     
  • The 1.25 is a safety factor that provides a 25% margin for overloads and peak performance. 
     
  • Example: For a 1000W array and a 24V battery bank, the calculation is

    (1000/24)×1.25=52.08open paren 1000 / 24 close paren cross 1.25 equals 52.08

    (1000/24)×1.25=52.08

    amps. You would need at least a 52-amp controller. 

     
    Step 3: Verify the voltage rating 
 
  • Your charge controller’s maximum input voltage must be higher than your solar array’s total Voc, especially considering that cold temperatures can increase panel voltage. 
     
  • Series wiring: When panels are wired in series, their voltages add up. Be sure the total is below the controller’s max input voltage. 
     
  • Parallel wiring: When panels are wired in parallel, their currents add up, while the voltage remains the same. This may require a higher-amperage controller. 
     
Step 4: Choose your controller
  • Select a controller with an amperage rating equal to or greater than the calculated amperage. For the example above, a 60-amp controller would be a suitable choice. 
     
  • Ensure the controller’s maximum input voltage rating is greater than your solar array’s total Voc. 
     
  • If you are using a specific type of controller, such as MPPT, always check its maximum input power specification as well. 
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