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Assumptions
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Blue on yellow = editable input. Black = calculated from the inputs above it.
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RTS system and household detailsInputUnit
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System size3.00kW
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Specific yield3.00kWh/kWp/day
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Annual generation3,285kWh/yr
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Household consumption350units/month
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Annual consumption4,200kWh/yr
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Consumption across the day
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Share in solar hours (approx. 8am-5pm)30%
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Share in the evening peak (6-10pm)40%
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Share in all other hours (5-6pm, 10pm-8am)30%
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Solar-hour consumption1,260kWh/yr
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Evening-peak consumption1,680kWh/yr
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All-other-hours consumption1,260kWh/yr
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Daytime surplus available to export or store2,025kWh/yr
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Battery
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Usable battery capacity5.00kWh
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Cycles per day1.00
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Round-trip efficiency90%
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Assumed battery life10years
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Capex and other costs
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Solar capex₹55,000₹/kW
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PM Surya Ghar capital subsidy₹78,000₹
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Battery cost₹22,000₹/kWh
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Hybrid inverter upcharge₹30,000₹
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Net capex, solar only₹87,000
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Net capex, with the battery above₹227,000
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Added cost of battery + hybrid inverter₹140,000
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Tariff and settlement
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Retail supply tariff (normal / off-peak)₹8.00₹/kWh
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Evening-peak uplift20%
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Solar-hour discount0%
Not considered as the consumer has its own rooftop solar and will consume the first from the RTS system
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Evening-peak tariff (6-10pm)₹9.60
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Solar-hour tariff₹8.00NA
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Export compensation rate₹2.00₹/kWh
For the units compensated at the end of the billing cycle
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Time-of-day tariff applies to all consumers? (1 = yes)1
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Storage subsidy
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Storage subsidy, as a share of the added battery cost50%
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Storage subsidy in rupees, at the battery size above₹70,000
This is for a 5 kWh system
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