6.6kW Solar System: Price, Load Capacity, How Big, and More

How Much Will a 6.6kW Solar System Save?

Installing a 6.6kW solar system can lead to substantial savings on your electricity bills. On average, a 6.6kW solar system can save you up to $2,048 per year. Over the 25-year lifetime of the solar panels, this amounts to a total savings of $51,191.

Rising Cost of Electricity

The cost of electricity has been on the rise for the past 40 years. In fact, there has been an increase of 270% in electricity costs during this period. This trend is expected to continue, making it even more important to find alternative sources of energy.

Electricity Costs

Source: U.S. Bureau of Labor Statistics

See also: Solar Panel Systems: The Ultimate Guide to Going Green in 2023

Electricity Saving

One of the main advantages of installing a solar system is the ability to generate your own electricity. The more electricity you generate, the less you rely on utility companies, ultimately resulting in lower utility bills.

Solar Energy for a Profit

In addition to saving on your electricity bills, you can also sell back the excess electricity you generate to the grid. This means that what you don’t use can be turned into profit. With current electricity costs, you can expect a 20% return on your investment per year on the panels alone.

6.6kW Solar Panel System Price

The typical cost of a 6.6kW solar system is around $13,200. However, it is important to note that the prices of solar panels have come down substantially over the past 10 years, making it a more affordable option for homeowners.

Solar Panel Costs

Source: The National Renewable Energy Laboratory (NREL)

6.6kW System with Battery Backup

If you are considering a solar system with battery backup, there are two main types of batteries to choose from – lead acid and lithium polymer batteries. For a 6.6kW system, the battery sizing will differ based on the type of battery chosen.

For lead acid batteries, the sizing calculation would be: 6.6kWh x 2 (for 50% depth of discharge) x 1.2 (inefficiency factor) = 79 kWh

For lithium batteries, the sizing calculation would be: 6.6kWh x 1.2 (for 80% depth of discharge) x 1.05 (inefficiency factor) = 42 kWh

Lithium batteries are highly recommended as they offer better efficiency, allowing you to use half as many batteries. Purchasing batteries and panels together can also help reduce the overall cost.

6.6kW Off-Grid Solar System

If you are looking to go completely off-grid with your solar system, you will need to consider additional factors. For a 6.6kW off-grid system, you will need to purchase at least 22 panels. Additionally, you will require approximately 42 kWh worth of lithium polymer batteries to ensure a full cycle. The typical cost of batteries required to run a 6.6kW system is around $19,543.

How Many Panels Are Needed?

Most solar panels have a capacity of 300 watts. To achieve a 6.6kW solar system, you will need at least 22 panels or more.

If you need different power requirements, check out 6 kW solar systems

How Big is a 6.6 kW Solar System?

Since each panel occupies approximately 17 sqft of space, installing 22 panels for a 6.6kW solar system will result in a total footprint of 374 sqft.

How Many kWh Does a 6.6kW Solar System Produce? (Load Per Day)

A typical 6.6kW solar system can generate around 33 kWh per day. However, this output is dependent on the panels receiving at least 5 hours of sunlight. This equates to 990 kWh per month and 12,045 kWh per year.

There are also 7 kW solar systems if you need a different sized system.

How Many Batteries Needed For a 6.6kW Solar Panel System?

The number of batteries required for a 6.6kW solar panel system depends on the type of battery chosen. If you opt for the recommended lithium polymer batteries, you will need approximately 42 kWh worth of batteries. You can choose to buy a single battery system or wire several batteries of smaller sizes together.

Is a 6.6kW Solar System Worth It?

If you reside in an area with ample sunlight, a 6.6kW solar system can generate approximately $2,048 worth of electricity every year. This translates to a 20% return on investment based on the current costs of panels. Considering the initial cost of $13,200 for this system, it is evident that investing in a 6.6kW solar system can greatly benefit you financially in the long run.

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Elliot has 20+ years of experience in renewable technology, from conservation to efficient living. His passion is to help others achieve independent off-grid living.

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