How to Calculate Your Solar System Size

How to Calculate Your Solar System Size

More often we have seen solar panels on rooftops. We have seen houses with a lot of modules and some homes with a smaller number of solar panels. A lot of homeowners think that a solar panel system is out of budget. Here is How to Calculate Your Solar System Size so it stays in budget.

First, I would like to tell you that with FreeVolt TX we make things easy for you to understand and “budget sense”.
Then, when you talk to one of our sales members, you will feel confident that the decision you are making is the right one. We make sure that the way to calculate the solar system size is the correct way.

How to calculate your solar system size

Putting the pieces together

Calculating the solar system size.

The best way to know how much power is needed to feed a house is by getting annual electricity usage. We ask for the yearly usage and how much the homeowner has spent in the last 12 months.

Also, we ask if the homeowner if in the future he is planning to add any electricity usage. For example, purchasing an electric car, adding a pool, etc. These are things to consider since they are not within the information gathered in the last 12 months usage.

Calculating the solar system energy production

Solar Engineering

After gathering the estimated yearly electricity usage, we take it to our engineering department. They will calculate energy production throughout the year. They take into consideration things like:

  • Azimuth
  • Orientation
  • The area designated for solar arrays
  • Shading
  • Humidity
  • Weather forecast
  • Roof inclination
  • Best inverter configuration
  • Fire and structural codes, etc.

Taking all that into consideration, they create a design and calculate the solar system size to produce the amount of electricity needed.

Solar Installation

Just to mention a few things involved in the installation:

  • Electrical and structural plans design by certified engineers
  • City permits
  • Load calculations
  • Mounting systems
  • Inverters and optimizers
  • HOA involvement
  • Modules
  • Labor, etc.

Solar Analysis

Now, to make “budget sense”, we consider the homeowner’s electricity spent. We calculate the inflation and the retail electricity increments cost per year. We make the system cost-efficient to each individual home.

So, as you can see, there are a lot of things involved to understand How to Calculate Your Solar System Size.

However, this does not have to be a rollercoaster to you, lets us do all that. We have seen so many DIY solar systems out there and those usually become a nightmare.

At FreeVolt TX we know solar, give us a call and get your free in-home energy evaluation, you got nothing to lose and a lot to discover.


You can find other solar-friendly blogs in our Power Blog