Step6: Inverter Sizing

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 Parameters recap:

1. Daily Energy Consumption: 20.75 kWh

2. Total Peak Power:3430 W

3. Days of Autonomy: 2 days

4. Solar Hour: 4 hours

5. Calculated Solar Array Value: 6.48 kW

6. Number of Solar Modules: 22 pieces of 300W modules

7. Battery Bank Size: Approximately 960.65 Ah at 48V (with 90% DOD).


To size the inverter for this solar power system, we'll follow these steps:

1. Determine the Total Power Requirement: This typically involves calculating the total power (in watts) that your inverter needs to supply simultaneously to your appliances and devices. Since you've provided the "Total Peak Power" as 3430W, this value will serve as our baseline for determining the inverter size.


2. Add a Margin for Safety: It's common practice to add a margin to the peak power requirement to ensure the inverter can handle brief surges in power demand, such as when appliances start up. A safe margin is around 20-25%.


Let's calculate the appropriate size for the inverter:

1. Total Peak Power Requirement:  3430 W

2. Safety Margin (25%): (3430 x 0.25 = 857.5W


Adding these together gives us the minimum power rating for the inverter:


3430W + 857.5W = 4287.5W


Rounding this up to the nearest commonly available inverter size, you would be looking at an inverter rated at approximately 4.3 kW.

Then, assuming a power factor of 0.8 (common for inverters), we convert this power to VA (since inverter ratings are often in VA or kVA):

Required Power (VA)} = Required power with Safety Margin (W)/Power Factor

= 4287.5/0.8 = 5359.375VA


To get this value in kVA and round up to the nearest thousand, we convert VA to kVA and round:

Required Power (kVA) (Round up to nearest thousand) =5359.375/10005

=5.0kVA


Thus, for your solar power system, the inverter size, considering real-world availability and rounding up to the nearest thousand, would be approximately 5.0 kVA

Summary:

1. Daily Energy Consumption: 20.75 kWh


2. Total Peak Power:3430 W


3. Days of Autonomy: 2 days


4. Solar Hour: 4 hours


5. Calculated Solar Array Value: 6.48 kW


6. Number of Solar Modules: 22 pieces of 300W modules


7. Battery Bank Size: Approximately 960.65 Ah at 48V (with 90% DOD).

8. Inverter Sizing: 5KVA inverter is ideal for the system 

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