Solar (PV) & Battery Sizing Calculator

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System Inputs

Your total daily electricity use. Check your utility bill. A typical home uses 5-15 kWh/day.
This field is required and must be positive.
Average daily hours of strong sunlight. Varies by location and season. Check local solar maps for accurate data.
Accounts for losses from dirt, wiring, heat, etc. 0.8 is a common conservative value.
The power rating of a single solar panel you plan to use. Common sizes are 350W to 550W.

Battery Inputs

How many days the battery should power your needs without any sun. 2-3 days is common for reliability.
Depth of Discharge (DoD) is how much battery capacity can be safely used. Li-ion has a higher DoD.
Should typically match the PV system voltage for simplicity and efficiency.

Advanced & Cost

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PV Array Size

1.5 kW

Panel Count

4

Battery Capacity

10.7 kWh

Estimated Cost

₹2,20,500

4 Panels

1.5 kW Array

10.7 kWh

System Sizing Results

Daily Energy Need 5,000 Wh/day
Required PV Array Power (with safety factor) 1,500 Wp
Number of Panels Required 4 Panels
Recommended Inverter Size ~1,875 VA
Required Battery Capacity (Ah) 321.5 Ah @ 48V
Required Battery Capacity (kWh) 10.7 kWh
MPPT Charge Controller Size ~40 A
Panel Configuration Suggestion 2S x 2P
Estimated Wire Gauge (PV to Controller) 10 AWG / 6 mm²

Estimated Cost Breakdown

Panels Cost ₹40,000
Battery Cost ₹1,60,750
Inverter, Controller, Misc. (Est. ~20%) ₹40,150
Total Estimated Cost ₹2,40,900

Calculation Breakdown