Question 1

How do I size a microgrid for a community?

Accepted Answer

To size a microgrid for a community, first calculate the total daily energy demand by multiplying the number of households by average daily consumption (typically 10-30 kWh per household). Then factor in commercial and critical loads. Next, determine solar PV capacity based on peak sun hours and system losses, size battery storage for desired autonomy days accounting for depth of discharge, and select an inverter rated for peak simultaneous load plus a safety margin of 20-25%.

Question 2

How much battery storage does a community microgrid need?

Accepted Answer

A community microgrid typically needs battery storage sized for 1-3 days of autonomy. Calculate required battery capacity by dividing total daily energy demand (kWh) by the battery's usable depth of discharge (usually 80% for lithium-ion, 50% for lead-acid). For example, a community using 500 kWh per day with 2 days autonomy and lithium-ion batteries would need approximately 1,250 kWh of total battery capacity (500 × 2 ÷ 0.8).

Question 3

What is the typical solar PV capacity needed for a 50-household community?

Accepted Answer

For a 50-household community consuming an average of 20 kWh per day per household, total daily demand is 1,000 kWh. With 5 peak sun hours and accounting for 20% system losses, the required solar PV capacity would be approximately 250 kW (1,000 ÷ 5 ÷ 0.8). This translates to roughly 625-750 standard 330-400W panels depending on panel efficiency chosen.

Microgrid Designer

Community Parameters

Solar PV Configuration

Battery & Backup

System Design Results

📊 Load Summary

☀️ Solar PV System