Take a home on the 151–300 unit slab without time-of-day billing, where the energy charge is ₹7.05 a unit. With its own net meter, each solar unit set against its bill saves the full ₹7.05. Through virtual net metering the same unit first loses 5 to 10 percent to line losses, then wheeling (₹1.19) and cross-subsidy surcharge (₹0.67) are charged on each unit credited. It is worth roughly ₹4.70 to ₹4.90. If the additional surcharge applies, about ₹1.10 more comes off.
That is the trade: a shared unit is worth about two-thirds of a unit from your own net meter, and in return one roof can serve members who have none.
