Under traditional Net Metering, exported solar units offset imported grid units 1-to-1 at retail slab rates. Under NEPRA's Net Billing (Buyback) framework, self-consumed solar power saves you the full DISCO retail tariff (Rs. 42–58+/unit), while exported excess units are credited at the National Average Energy Purchase Price (~Rs. 11.00/unit). Maximizing daytime self-consumption delivers the highest ROI.

While Tall Tubular lead-acid batteries have a lower upfront cost (Rs. ~140,000 per 48V bank), they degrade rapidly in Pakistani summer temperatures with a cycle life of only 800–1,200 cycles (2–3 years at 50% DoD), requiring 3 to 4 complete bank replacements over 10 years. LiFePO4 lithium batteries last 5,000–6,000 cycles (10+ years at 90% DoD) with zero replacements, resulting in ~35%–40% lower cost per stored kWh.

Typical processing time across LESCO, IESCO, GEPCO, and other DISCOs ranges from 45 to 90 days. The turnkey process includes NEPRA generation license application, distribution transformer load verification, third-party inspection, and bidirectional meter installation.

Standard On-Grid string inverters shut down immediately during grid outages for lineman safety (anti-islanding). To run air conditioners during load shedding, you need a Hybrid inverter with either Tubular or LiFePO4 battery storage sized to handle compressor inrush currents.