Before anyone quotes you a system, pull out your last electricity bill. Most people only look at the amount due. But the bill has a lot more on it, and a few of those numbers decide what kind of solar system you can and should install.
1. Your last 12 months of units
Most DISCO bills, including LESCO, print your units for the past 12 months. Look at the highest month (usually June or July) and the lowest (usually January). That gap tells you how much of your use is AC and cooling.
If your summer months are three times your winter months, cooling is your big load. Size for that, and think about a battery for evening AC hours.
2. Sanctioned load
This is the load your connection is approved for, written in kW. It matters more now than before. Under the 2026 net billing rules, a grid-connected solar system cannot be bigger than your sanctioned load. If you want a 10kW system on a 5kW connection, you will need to get the sanctioned load increased first.
3. Single phase or three phase
Most homes are single phase. Bigger houses, offices and factories are often three phase. This decides which inverters you can use. Infinix has single-phase models up to 12kW, and three-phase Everon models from 15kW to 125kW.
4. Tariff type
Residential, commercial or industrial, and whether you have peak and off-peak (TOU) metering. Commercial and TOU users often save more with solar because their daytime and peak rates are higher.
5. Units in a typical day
Divide a month’s units by 30. A home using 600 units a month uses about 20 units a day. That number, plus when you use it, is what panels and batteries are sized around.
A quick checklist
- Highest and lowest monthly units
- Sanctioned load (kW)
- Single or three phase
- Tariff type
- Rough daily units
Got those? Put your appliances into our solar load calculator and you will have a fair idea of the system size before you speak to anyone.
Send us your bill
A clear photo of your latest bill is all we need to suggest the right system. WhatsApp it to our Lahore team.