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Solar Generator Capacity Formula:
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Solar generator capacity refers to the amount of energy a solar generator can store and deliver, typically measured in kilowatt-hours (kWh). It determines how long the generator can power electrical devices based on their energy consumption.
The calculator uses the solar generator capacity formula:
Where:
Explanation: The formula calculates the required energy storage capacity by multiplying the load power by the desired runtime, then dividing by the system efficiency to account for energy losses.
Details: Accurate capacity calculation is essential for designing reliable solar power systems, ensuring sufficient energy storage for your needs, and preventing system overload or underperformance.
Tips: Enter load in Watts, time in hours, and efficiency factor (typically 0.7-0.9 for most systems). All values must be positive numbers with efficiency between 0.01 and 1.
Q1: What is a typical efficiency value for solar generators?
A: Most solar generator systems have efficiencies between 70-90% (0.7-0.9), accounting for inverter losses, battery charging/discharging losses, and other system inefficiencies.
Q2: How do I determine my total load?
A: Add up the wattage of all devices you plan to power simultaneously. Check device labels or manuals for power consumption specifications.
Q3: Can I use this for off-grid solar systems?
A: Yes, this calculator is suitable for estimating battery bank size for both portable solar generators and larger off-grid solar installations.
Q4: Should I include a safety margin?
A: It's recommended to add 20-30% capacity margin to account for unexpected load increases, battery aging, and reduced efficiency over time.
Q5: How does temperature affect capacity?
A: Battery capacity decreases in cold temperatures. For operation below 20°C (68°F), consider increasing calculated capacity by 10-20%.