How Many Panels to Run a Whole House? (Philippines)
TL;DR
A whole-house grid-tied system usually runs 3kW to 10kW+ depending on home size and bill: 3kW (~6 panels) for a small home or condo, 5kW (~10 panels) for a typical mid-size house, 8kW (~16 panels) for a larger home with aircon, and 10kW+ (~20 panels) for a big house or small business.
A whole-house grid-tied solar system in the Philippines typically runs 3kW to 10kW or more, depending on home size and monthly electric bill. A small condo or bungalow fits comfortably on a 3kW system (about 6 panels), a typical mid-size house lands around 5kW (about 10 panels), and a larger home running aircon through the day often needs 8-10kW (16-20 panels). There’s no single “whole house” number — it scales with how much power the household actually uses.
Why “whole house” doesn’t mean one fixed system size
Two households in similar-sized homes can need very different systems. What drives system size is monthly electric usage, not square footage or room count — a household running aircon units, a water pump, and appliances heavily during the day pulls a lot more power than one that’s mostly out until evening, even in the same size house. That’s why sizing starts from the electric bill, not the floor plan. See our guide on how many solar panels you need for the bill-to-panel-count formula this site uses throughout.
System size by home type and bill
| Home type | Typical monthly bill | System size | Panel count | Guide |
|---|---|---|---|---|
| Small condo / bungalow | ₱4,500-5,000 | ~3kW | ~6 panels | 3kW guide |
| Typical mid-size house | ₱7,500-8,500 | ~5kW | ~10 panels | 5kW guide |
| Larger house with aircon | ₱12,000-13,500 | ~8kW | ~16 panels | 8kW guide |
| Big house / small business | ₱15,000+ | ~10kW+ | ~20+ panels | 10kW guide |
These are starting points, not final specs — roof space, shading, and orientation all shift the ideal size for a specific property. Each linked guide breaks down installed price, monthly output, and payback for that size in detail.
Does a whole-house system mean 100% of the bill gets offset?
No, and sizing for 100% usually isn’t the smartest move. Net metering only credits exported power at roughly ₱5-7/kWh, well below the retail rate, so a system oversized to chase full offset ends up selling a lot of its output back cheaply instead of saving at full value. Most homeowners get a better return sizing to cover 60-90% of daytime and evening usage rather than every kWh on the bill. See what size solar system for my bill for that math in more detail.
What about homes with very high bills?
Homes with ₱18,000+ monthly bills, or small businesses running equipment through the day, sometimes need systems well past 10kW. At that point the math starts to resemble commercial sizing more than typical residential — worth a direct conversation with an installer rather than a general table, since usage patterns get more specific to the property.
Does a bigger house always need a bigger system?
Not automatically. A large house with an empty upper floor and a household that’s mostly out during the day can have a smaller bill, and therefore a smaller ideal system size, than a compact house running a home business and aircon all day. Bill size beats floor area as the sizing signal every time.
How do I find my exact number instead of picking from the table?
Run your average monthly bill through the cost calculator — it applies the same bill-to-kWh-to-kW math these guides use and matches it against current installed pricing, so you get a size and price range specific to your numbers rather than a home-type generalization. For current pricing by size across the board, check our price pages.
Frequently asked questions
How many solar panels do I need to power a whole house?
Most Philippine homes need somewhere between 6 and 20 panels, depending on home size and electric bill. A small condo or bungalow needs roughly 6 panels (3kW); a larger house with aircon needs roughly 16-20 panels (8-10kW).
Can solar panels really run a whole house in the Philippines?
A grid-tied system can offset most of a home's usage, typically 40-80% of the bill, but it doesn't replace the grid connection entirely. Panels don't produce at night, so the home still draws grid power for evening and overnight use unless paired with a battery.
What size system does an average Philippine household need?
Most single-family homes with a ₱7,500-8,500 monthly bill land around 5kW. Smaller condos or bungalows with lower bills fit 3kW, while larger homes running aircon and appliances heavily during the day often need 8-10kW.
Does whole-house solar mean I need a battery too?
No, a grid-tied system without a battery still works and is the more common, cheaper setup. A battery adds backup power during brownouts and typhoons, but it's a separate decision from sizing the panels themselves.
How do I figure out the exact size for my house?
Start from your average monthly electric bill rather than square footage, since bill size reflects actual usage better than floor area. Use the cost calculator or see our system sizing guide for the bill-to-kW math.
What if my roof can't fit the size I need?
Then you're choosing between a smaller system that offsets less of the bill, or higher-wattage panels to fit more capacity into the available space. An installer can confirm what actually fits during a site survey.