How Many Solar Panels Do I Need for My Home in Phoenix?

Are you considering solar energy for your home in Phoenix? Now is the perfect time to harness the power of the sun and take advantage of significant savings through federal and state tax credits. Our team at Phoenix Valley Solar can help you navigate these incentives and maximize your savings. You can also use our Arizona Solar Calculator to get an estimate of your potential benefits.

If you’re considering home solar installation in Phoenix, one of the first questions you probably have is: "How many solar panels do I actually need?"

The answer depends on a few important factors — but the good news is that Phoenix

homeowners are in one of the best spots in the country to maximize solar power.

Here’s what you need to know when sizing a residential solar panel system for your Arizona home.

1. Start With Your Monthly Electricity Usage

The first step is looking at your past electricity bills. Specifically, you want to know your annual kilowatt-hour (kWh) usage — the amount of electricity your home consumes over a year.

In Phoenix, the average home uses about 12,000 kWh per year.

However, factors like pool pumps, electric vehicles, or larger homes can push your usage much higher.

🔹 Pro Tip: A good solar installer (like Phoenix Valley Solar) will ask for your utility history to size your system accurately.

2. Know How Much Sunshine Phoenix Provides

Phoenix is a solar powerhouse. With around 5.7 sun hours per day, you’ll need fewer panels compared to cloudier states.

The sunny climate means your panels will consistently produce more energy per panel, reducing the total number needed to meet your home’s needs.

This is why solar panel installation in Phoenix, AZ offers some of the fastest return-on-investment rates in the country!

3. Understand Solar Panel Wattage

Solar panels come in different wattages — typically between 350W and 450W per panel today.

Higher wattage panels:

• Produce more energy per panel

• Require fewer panels for the same system size

• Are ideal if you have limited roof space

🔹 Example: If you need a 10 kW system and choose 400W panels:

• 10,000 watts ÷ 400 watts/panel = 25 panels

Choosing the right equipment matters for both cost and efficiency.

4. Roof Space and Layout Matter

Every roof is unique. Key things that affect how many panels you can fit include:

• Roof size

• Roof orientation (south-facing is ideal)

• Shade from trees or neighboring buildings

• Roof angle (tilt)

A professional site evaluation from a trusted Phoenix solar company ensures your system is optimized for your specific home.

5. Future Energy Needs

When sizing your system, think ahead:

• Planning to buy an electric car soon?

• Adding a pool or spa?

• Expanding your home?

Your solar panel system can be sized slightly larger now to accommodate future energy use — saving you the cost of an expansion later.

Pairing your panels with home solar battery backup can also help you store energy for peak usage times, giving you even greater flexibility.

So, How Many Solar Panels Will You Need?

✅ For a typical Phoenix household (around 1,200 kWh/month): Expect 20–30 high-efficiency panels, depending on panel wattage and your goals.

✅ For smaller or ultra-efficient homes: Maybe only 15–20 panels.

✅ For high-usage homes (EVs, large A/C loads, pools): You might need 30+ panels and should also consider solar battery storage.

Ultimately, a personalized consultation is the only way to know for sure — and that’s where Phoenix Valley Solar comes in.

Work with the Best: Phoenix Valley Solar

At Phoenix Valley Solar, we specialize in:

• Tailored home solar installations in Phoenix

• Expert roof evaluations

• Full system design, installation, and activation

• Adding Tesla Powerwall battery backups for full energy control

We’re proud to be known as the best solar company in Phoenix — helping homeowners across Scottsdale, Mesa, Chandler, and the entire Valley go solar with confidence.

Ready to Find Out How Many Panels You Need?

Take the first step today. Contact Phoenix Valley Solar for a free consultation and a personalized system design — and start saving with solar!

Are you considering solar energy for your home in Phoenix? Now is the perfect time to harness the power of the sun and take advantage of significant savings through federal and state tax credits. Our team at Phoenix Valley Solar can help you navigate these incentives and maximize your savings. You can also use our Arizona Solar Calculator to get an estimate of your potential benefits.