On-Grid vs Hybrid Solar: How to Decide for Your Home in Pakistan
Understand the differences between on-grid and hybrid solar systems, and learn which is right for your home based on your area's load-shedding pattern.
The Real Question in Pakistan
You’ve decided solar makes sense for your electricity bills. But now comes the hard choice: should you go with an on-grid system (no battery, tied directly to WAPDA’s grid) or a hybrid system (solar plus battery backup for when the grid is down)?
The answer depends almost entirely on one thing: how many hours of load-shedding does your area see each day?
On-Grid: No Battery, Simpler System
How It Works
An on-grid solar system is the simplest design:
- Solar panels generate power during the day
- You use that power immediately to run your appliances
- Excess power flows back to the grid (if you have net metering approval)
- At night or cloudy days, you buy power from WAPDA as normal
- No battery, so no backup during load-shedding
Cost & Payback
- System cost: Roughly PKR 120,000–160,000 per kilowatt (panels, inverter, wiring, no battery)
- Monthly savings: For a typical 300 kWh/month home with a 5 kW system, expect to save PKR 8,000–10,000 per month
- Payback period: 5–7 years in most cases
Who Should Choose On-Grid
Choose on-grid only if your area experiences less than 2 hours of load-shedding per day, and that shedding happens during daylight hours (not evening).
Why? Your solar generates power exactly when you need it (daytime), so you offset your bill. At night, you’re back on the grid anyway. A 2-hour daytime outage is annoying but not a dealbreaker — you flip a switch, wait it out, and keep running on grid power.
The NEPRA Catch
If your on-grid system is 5 kW or larger, you’re eligible to apply for net metering with WAPDA, which lets you export surplus solar and earn credit. But three things to know:
- Your system size cannot exceed your sanctioned load. Check your WAPDA bill for the kilowatt figure at the top. If it says 5 kW, you can’t install an 8 kW solar system.
- You need a smart meter (costs ~PKR 18,500) and AEDB certification from your installer.
- NEPRA’s new 2025 rules use net billing, not 1:1 net metering. That means excess power you export earns credit at the utility’s “average purchase price,” not your full retail electricity rate. Still good, but not as generous as pure 1:1 metering.
Hybrid: Solar + Battery
How It Works
A hybrid system adds a battery (usually 3–10 kWh):
- Solar panels generate power during the day
- Battery charges when solar is abundant and you’re using less power
- During load-shedding, your battery kicks in and runs critical appliances (lights, fans, fridge, WiFi, maybe an AC)
- At night, you use battery power, then switch to grid if battery is depleted
- No export to grid — batteries prioritize your own backup
Cost & Payback
- System cost: PKR 120,000–160,000/kW for panels + inverter, plus PKR 150,000–250,000 per kWh for battery
- Example: A 5 kW solar + 5 kWh battery system costs ~PKR 900,000–1,200,000 total
- Monthly savings: Slightly lower than on-grid (because batteries aren’t perfect; they lose ~10–15% of energy to heat and inefficiency) — perhaps PKR 7,000–9,000/month
- Payback period: 8–12 years (longer because of battery cost, but you get backup)
Who Should Choose Hybrid
Choose hybrid if:
- Your area has 2+ hours of load-shedding per day, especially in evening or night hours
- The outages are predictable (you know when to expect them) and happen when you’re home
- You want peace of mind — you don’t want your family sitting in the dark during peak evening hours
- You have critical loads: a fridge full of medicines, a home office where you work, or elderly family members who need fans
Rightsizing a Hybrid Battery
You don’t need a massive battery. Work backwards from your critical load:
- Critical load example: Ceiling fans (75W), lights (60W), fridge (150W on average), WiFi router (15W) = roughly 0.3 kW continuous
- Longest outage: 4 hours (check your local load-shedding schedule)
- Battery needed: 0.3 kW × 4 hours = 1.2 kWh
In practice, installers round to 3–5 kWh for margin. A 5 kWh battery can keep your essential lights, fans, and fridge running for 15+ hours.
Battery reality check: Batteries degrade over time. A 5 kWh battery is really giving you 4–4.5 kWh of usable power after 5 years, and it’ll need replacement every 7–10 years if you cycle it heavily.
The Decision Flowchart
| Your Load-Shedding Pattern | Recommendation | Why |
|---|---|---|
| < 2 hours/day (rare or morning only) | On-grid | Grid is mostly available; solar handles daytime load |
| 2–4 hours/day (moderate) | Hybrid with 3–5 kWh battery | Evening outages affect your comfort; small battery solves it |
| 4–8 hours/day (regular) | Hybrid with 5–10 kWh battery | Long outages; larger battery needed |
| > 8 hours/day or unpredictable | Hybrid (large) or Off-grid | Severe unreliability; consider going mostly independent |
A Word on Seasonal Reality
Remember: your solar system’s output varies by season.
- Summer (May–July): 6.5 peak sun hours/day — your system is cranking
- Winter (Dec–Feb): 3.8 peak sun hours/day — your system is 40% weaker
A calculator might show you need 5 kW for 300 kWh/month. That works in average conditions. But in winter, that same 5 kW system might only produce ~400 kWh/month (not 450), so your battery becomes more important as days get shorter.
Questions to Ask Your Installer
Before committing, ask:
- Is my sanctioned load enough for the system I want? (Check your WAPDA bill)
- What’s the longest typical load-shedding in my feeder area? (Call your local LESCO office)
- If I go hybrid, what’s the real usable capacity after 5 years? (They should give you a realistic degradation curve)
- Are you AEDB-certified? (Required for net metering approval and warranty)
- What’s included in maintenance? (Cleaning panels, battery checks, software updates)
The Bottom Line
- On-grid is cheaper, simpler, and works great if your area has minimal or daytime-only load-shedding.
- Hybrid costs more but gives you independence from evening outages and peace of mind.
- The decision is really about load-shedding hours, not about being “green.” If you have 6 hours of regular evening cuts, hybrid isn’t optional — it’s practical.
Not sure which is right for you? Use our savings calculator — tell it your monthly electricity usage and your area’s load-shedding pattern, and we’ll recommend one and show you the payback timeline.
Or give us a call — we’ll visit your site, check your sanctioned load, and design the system that actually fits your life in Pakistan, not a catalogue package.