Solar calculator
Estimate Your Required Solar kW
Use your average monthly summer bill amount or average monthly summer units to get a quick solar capacity estimate based on the uploaded Uniteconomics sheet.
Required kW
Calculate from Summer Usage
Enter either value. The calculator uses less-than-or-equal-to slab logic from the Monthly Saving and Monthly Generation columns.
Enter billed amount to calculate.
Enter summer units to calculate.
Required Area
Calculate Your Required Roof Top Area to install the Solar system
Choose your solar system size, panel type and available wattage. The calculator uses the Area Required sheet logic to estimate panel quantity and roof area.
Required Solar Type
Find the Right Solar System Type
Answer these questions from the Solar Selection sheet to identify whether On-Grid, Hybrid or Off-Grid is the better fit.
Off-Grid Battery Calculation
Estimate Battery Capacity
Enter the Values column inputs from the Off-Grid Battery Calculation sheet. Actual Values are derived with the same margin and assumptions.
- Daily Consumption (kWh): This is the total energy your business or home uses in 24 hours.
- Autonomy Days: Number of days you want the batteries to supply power without any solar input.
- Depth of Discharge( DoD ): The percentage of the battery’s capacity you are allowed to use safely.
- System Efficiency: Accounts for energy losses. 1-Inverter conversion (DC to AC),2- Wiring losses, 3-Battery round-trip efficiency (charging + discharging)
Hybrid Battery Calculation
Estimate Hybrid Battery Capacity
Enter the Values column inputs from the Hybrid Battery Calculation sheet. Actual Values are derived using the same sheet assumptions.
- Daily Essential/Critical Load (kW of kWh): What must keep running during outage? (e.g., lights, fans, computers, fridge, small machines, billing system). Often 30–70% of total load.
- Decide backup duration (hours): 4–6 hours → Good for most businesses (covers typical UP power cuts). 8–12 hours → More comfortable (night + outage). 24 hours → Rare and expensive (closer to off-grid thinking).
- Autonomy Days: You do not need 2–3 days of full autonomy like off-grid. Most practical hybrid setups in India (including Uttar Pradesh) target 4–12 hours of backup for critical or essential loads.
- Depth of Discharge( DoD ): The percentage of the battery’s capacity you are allowed to use safely.
- System Efficiency: Accounts for energy losses. 1-Inverter conversion (DC to AC),2- Wiring losses, 3-Battery round-trip efficiency (charging + discharging)
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