How Many Solar Panels Do I Need?

Our solar panel calculator makes it easy to size a solar array for your home. Answer the questions below to estimate how many solar panels you’ll need for your home, based on your location and utility consumption. Results may vary.

Solar Panel Calculator

On average, how many KiloWatt-Hours (kWh) do you use per month? (Refer to your electric bill)

Zip Code (Determines hours of daily sun you receive)

Recommended System Size


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How Much Do Solar Panels Cost?

How much do solar panels cost for my home? And how many solar panels do I need to eliminate my electric bill?

Solar panel costs and quantity are determined by your average electricity usage (kWh) and geographical location.

Standard solar panels cost around 65 to 75 cents per watt. Solar panels from well-known manufacturers run as high as one to two dollars (or more) per watt.

Thanks to federal tax credits and increasing demand, solar installation costs continue to drop, making it more affordable to go green. Installation costs fell over 70% in the last ten years, according to the Solar Energy Industries Association.

However, you can still expect to pay up to $10,000 or more (depending on the size of your home) for solar equipment. Then add solar panel installer costs, which can range from $5,000 to $10,000 depending on who you hire.

If you’re looking for the most cost-effective solar solution, DIY solar kits are the way to go. GoGreenSolar is the leading retailer in do-it-yourself solar systems, offering step-by-step installation support and a permit approval guarantee to help you save thousands of dollars. Start by using our solar panel calculator to estimate the cost of adding solar to your home.

Let us help you choose the perfect solar kit for your home!

Request a Quote call (866) 798-4435

Calculate Solar Panel Costs for Your Home

To use our solar panel calculator above, follow these steps to discover how many solar panels you need and estimate your costs:


Determine your average monthly electricity usage

You probably consume more electricity during certain months of the year. Refer to your electricity bills for the past 12 months, and calculate your average usage (kWh) over that period.

Sample electric bill


Calculate your daily kWh usage

Next, you can estimate your average daily kWh usage by dividing your monthly usage by 30.

For example, say your average kWh per month is 1,100. 1,100 kWh divided by 30 days (1 month) equals 37 kWh per day.


Estimate the amount of sunlight your solar panels will receive

Sunlight affects how much energy your solar panels generate. As a rough estimate, let’s assume that a 310W solar panel produces 1.24 kWh a day, and your location receives 4 hours of sunlight per day.


Factor in your potential solar power usage

Next, how much of your current kWh usage do you want to offset with solar power? 100%? 80%? 50%? Multiply this percentage with your daily kWh usage.

If you want your solar system to account for 80% of your energy consumption, here’s how the calculation would work: 37 kWh per day x 0.80 = 29.6 kWh.


Determine how many solar panels you’ll need

One solar panel produces about 1.24 kWh per day. In the example above, you would need 24 solar panels to account for 80% of your average consumption (29.6 kWh daily usage divided by 1.24 kWh per panel). Likewise, if you wanted to account for 100% of your daily kWh consumption, you would need 30 solar panels (37 kWh daily usage divided by 1.24 kWh per panel).

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Connect with a Solar Expert for a Free Quote

Still need help to determine how many solar panels you need for your home? We'll design and provide estimates on a solar panel system for your home. Here's how:


Custom Design

We use satellite technology to create solar panel layouts that fit your home’s unique specifications, and draft code-compliant plans to ensure you don’t run into roadblocks with your city, HOA or utility company.


Full Technical Support

Our solar kits come with step-by-step installation guides to help you set it up right the first time. Plus, receive dedicated phone and email support from a certified NABCEP professional.


100% Money-Back Guarantee*

We’re the only solar company to offer a money-back guarantee. If your permit isn’t approved even after following the proper steps, we’ll provide a full refund of your purchase.

*Some exclusions applied. DETAILS

Let us help you choose the perfect solar kit for your home!

Request a Quote call (866) 798-4435

Explore Our Top DIY Solar Panel Kits

Our 50+ solar panel kits come with installation support, permit approval guarantees and flexible financing options for a hassle-free experience.

String Inverter

String Inverter

Micro Inverter

Micro Inverter

PV Optimizer

PV Optimizer

Cost $ $$ $$$
Starting Price From $5,183.50+ From $4,645+ From $7,486.49+
kW Range 3kW - 40kW+ 2kW - 40kW+ 4kW - 40kW+
Battery Expansion Expandable, but only if planned for Easily expandable Expandable, but only if planned for
Shading Not ideal for homes with shade Ideal for homes with shade Ideal for homes with shade
Remote Monitoring checked checked checked
Monitoring Options All Systems Only Panel Level and All System Panel Level and All System
Mounting Type Ground Mount Roof Mount Roof Mount

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We'll help you figure out your solar needs!

Fill out the form for a complimentary solar panel quote that includes a custom solar panel layout using satellite technology and a breakdown of solar energy production, federal tax credit and energy offset.