- Add up the watts of everything you run at the same time.
- Choose an inverter about 20 to 30% above that number.
- 4kW suits small homes with one AC; 6kW suits most family homes.
- When in doubt, choose the size up and a model that supports parallel use.
The most common question we hear is simple: “Which inverter size should I buy?” The answer depends on what you run at the same time, not on everything in your house.
Step 1: List what runs together
Use these typical power ratings as a guide. Check the label on your own appliances for the exact number.
| Appliance | Typical power |
|---|---|
| LED light | 10 to 20W |
| Ceiling fan (inverter fan) | 30 to 75W |
| Fridge | 150 to 300W |
| LED TV | 60 to 150W |
| Washing machine | 400 to 800W |
| 1-ton inverter AC | about 900 to 1,200W |
| 1.5-ton inverter AC | about 1,300 to 1,800W |
| Water pump (1 HP) | about 750W, more at start-up |
Step 2: Add 20 to 30% extra
Motors in pumps, fridges and ACs pull extra power when they start. Leave headroom so the inverter does not trip. Example: if your running load is 3,500W, choose a 4.5kW to 5kW class inverter or the next size up.
Step 3: Match the size to your home
| Size | Good for | Infinix options |
|---|---|---|
| 3kW | Small home or shop, fans, lights, fridge | Dynamic 3kW, Blaze Gold 3kW |
| 4kW | Small family home with one AC | Smart 4kW, Prism 4kW |
| 5kW to 6kW | Family home with 1 to 2 ACs | Empire 6kW, Recon 6kW, Everon 6.6kW |
| 8kW to 12kW | Large home or office, 3+ ACs | Everon 10kW, Everon 8 to 12kW |
What about a 5kW inverter?
Many people search for a “5kW inverter”. In practice, a 5kW load is usually best served by a 6kW inverter, which gives you safe headroom and space to grow. If your load is closer to 3.5kW, a 4kW model like the Smart or Prism Twin 4kW, both with 5,000W PV input, is the better value.
Frequently asked questions
Can I upgrade later if I buy a smaller inverter?
Some models support parallel operation, so you can add a second unit later. Ask us which models allow this before you buy.
Does a bigger inverter use more electricity?
A larger inverter has slightly higher idle consumption, but the difference is small. Buying the right size matters more.
Should the battery size match the inverter?
Battery size depends on how many hours of backup you want. Read our battery backup guide to work it out.
Need help choosing?
Send us your electricity bill or appliance list. Our Lahore team will suggest the right Infinix inverter and battery, and share the latest price.