Tag Archives: Solar FAQs

Do I need to own my building to go solar?

Well, most likely yes. If you own your building, then it will be much easier for you to decide to add a solar system on your building.

Ok, I own my building. Let’s go to the next question >>

Having said that, that does not mean you cannot go solar if you live in a condo or apartment building or if you are renting the house or commercial property you occupy.  You just will just need to convince your landlord to add a solar system to your building. There are various ways for renters and multi-unit buildings to go solar.

[Learn more about solar for renters and multi-unit properties]

There are also various options for renters to invest in and benefit from solar energy without necessarily placing a system on their building.

[Learn about community solar and crowdfunding solar systems]

The cost breakdown of a solar system

When purchasing a solar system it is important to understand its main components so you know what you are paying for, and if you are overpaying.

This is especially important if you are purchasing a solar-lease. You might be leaving a lot of money (savings) on the table if you are leasing a solar system versus owning or financing one.

Getting back to the main components of a solar system. There are really 3 main components to most grid-connected photovoltaic solar systems. These are:
1) the solar panels also called the solar modules
2) the inverter or inverters
3) the racking

As of mid-2015, the equipment costs of a typical residential solar system breakdown as follows:
Panels – 0.80 / watt
Inverter – 0.30 / watt
Racking – 0.30 / watt
Balance of system – 0.30 / watt
TOTAL: ~$1.70 / watt (for equipment)

On top of the equipment costs, the installer will incur various other “soft” costs like installation labor, sales & marketing costs, design, permitting, and project management. Here is a breakdown of average costs from a study that National Renewable Energy Laboratory (NREL) conducted. Based on this study the average cost of a residential solar system was $3.09 per watt in 2015 in the US.

NREL Resi Sys Cost Breakdown

In a recent presentation hosted by SDG&E and presented by Center for Sustainable Energy the presenter shared with the audience that the cost of a solar installation can range anywhere between $3 per watt to $6 per watt. The major factors that drive the wide range in pricing are follows:

1) Marketing costs
2) Roof replacement
3) Electrical panel upgrade
4) tree trimming
5 trenching (for ground mount installations)

If you are working with a local electrical contractor who you already know, obviously that contractor is not incurring the same level of high marketing sales costs as a large national solar company who sells with an aggressive sales force and on the premise of its brand. The “sales & marketing” costs end up being as high as $0.60 / watt. About 15-20% of the entire cost of an average solar install.

There could also be some other major costs that increase the cost of an installation. Roof replacements could cost $10,000 or more. But it is not always fair to include the roof replacement cost as part of the solar system since it is an expense that needs to be realized every 20-30 years or so. The other most common cost is the electrical panel upgrade. While most solar systems will not require this upgrade, when an upgrade is needed, it could increase the cost of an install by $1000-$2000 in most cases.

The above discussion covered the cost structure for residential systems which usually range in size between 4kw to 15kw. Once the system size goes up above 100kW, it is quite possible to build a system for a cost of $2.50 / watt or below.

Just how fast is the solar energy sector growing?

We think this quote by Ray Kurzweil (head of Google’s artificial intelligence, MIT professor and Founder of Singularity University) best summarizes solar sector’s unprecedented 20 year growth and it’s inevitable future dominance vis-a-via other types of energy.

“Solar power actually is doubling every two years and has been for 20 years. Regardless of all the political debates, the actual output in watts has been doubling every two years. It’s eight doublings away from meeting 100 percent of our energy needs. So when I presented this to the Prime Minister of Israel, he said, “But do we have enough sunlight to do this with?” I said, “Actually, we have 10,000 times more than we need.” After we double eight more times and can meet all of our energy needs with solar, we’ll be using one part in 10,000 of the sunlight that falls on the earth.”

And here is a graph that shows the rapid growth of the solar industry from 2007 to 2017:


Source: http://www.Ren21.net
Renewable Energy Policy Network for the 21st Century – 2018 Global Status Report