How many months of electricity use should I enter?+
Use the average imported kWh from the latest 12 months when available. A full year captures seasonal air-conditioning, heating, pump, and occupancy changes. If the property or appliances changed recently, build a forward-looking load estimate instead.
Can I size solar from the bill amount only?+
Yes, but it is less exact. The calculator converts rupees to estimated kWh using a blended rate. Units from the bill are better because taxes, fixed charges, tariff slabs, fuel adjustments, arrears, and other charges do not represent electrical energy.
Will on-grid solar work during load shedding?+
A conventional grid-tied system normally disconnects when the grid fails to prevent unsafe back-feed. Backup requires a properly designed hybrid or backup-capable inverter, storage, isolation or changeover equipment, and a defined critical-load circuit.
Is net metering the same as net billing in Pakistan?+
People still commonly say net metering or green meter, but NEPRA’s 2026 prosumer framework describes net billing: imported kWh are charged at the applicable tariff and exported kWh receive a separate purchase credit. Existing agreements may have different treatment, so check the signed agreement and current DISCO bill.
How much roof space does a solar system need?+
It depends on module dimensions, wattage, tilt, row spacing, shade, setbacks, and roof obstructions. Enter clear usable area, not total plot size. The result is a screening estimate; an installer must prepare a measured module layout and structural plan.
Should I oversize the system to earn from exported units?+
Usually the stronger first objective is to cover high-value daytime consumption. Exports can still help, but their credit is separate from the retail tariff, and a proposed grid-connected capacity must also satisfy sanctioned-load and network-feasibility rules.
Are solar EMI results guaranteed?+
No. They are comparison scenarios. The bank decides eligibility, vendor acceptance, valuation, benchmark, spread, fees, insurance or Takaful, security, down payment, and final schedule at approval or disbursement.
What must an installer verify after the calculator?+
At minimum: 12-month load profile, site shade, module layout, slab or roof condition, wind and mounting design, inverter and battery compatibility, protection and earthing, cable routes, sanctioned load, DISCO feasibility, warranties, monitoring, bill of materials, and the exact filing scope.