HOW SOLAR WORKS

Solar panels are made up of individual solar cells called photovoltaic cells or PV cells. These are similar to the PV cells you’ve seen at work in solar powered calculators, yard lights, and radios. When particles of sunlight called photons hits the PV cells on a solar panel, the photons are converted into electrons of direct current or DC electricity. From the solar panel, the electrons flow into an inverter. The inverter converts the DC power to AC power, which is what you typically use throughout your home for your appliances, lights, heating systems and more.

Any solar energy generated that is not used by the home goes into the electrical grid that the home is connected to. If the solar panels produce less electrity than the home needs, energy is seamlessly pulled from the utility grid. There is no interruption in the flow of electricity, and you’ll never notice the switch!

RESIDENTIAL SOLAR TIMELINE

We all know that solar panels are a great way of lowering your utility bills, and supporting the environment… but how long does it take to actually get a solar power system? Here’s your expected timeline of the process. 

  • MILESTONE 1: SIGNING THE PAPERWORK

    Everything gets started on the day you sign the paperwork and give the team the go ahead. This meeting won’t be the first time, it will happen after several meetings – if you’re buying, you’ve already gone through the process of getting estimates and such. In most cases, the paperwork can be quickly and easily completed, but in some rare cases, it may take more than a day to get all of the paperwork signed. If you’re waiting on a loan approval from a bank, for example, you might need to delay until that’s been settled.

  • MILESTONE 2: GATHERING SITE-SPECIFIC DATA

    Every house is unique, and many are subtly altered over time as owners and contractors make a variety of changes and improvements. It could take up to 2 weeks for the engineers to fully survey the house and gather all of the specific information they need.The gathered data isn’t limited to the house itself – the engineers will also be looking at your utility connections and generally making sure that the house is ready to have a solar system installed. This is rarely a problem for newer homes, but old houses may actually have faulty wiring or other issues. There is a small chance that an electrician may need to do some work before the solar installation can proceed – if so, you may experience delays until the electrician is available. Most electricians can complete a job on a residential home in several hours (at most).

  • MILESTONE 3: CREATING THE DESIGN

    Over the next Milestone, your installation team will work on creating a complete design for the upgrade of your home. This will detail all the relevant components of the job – where individual parts and pieces will go, how the wires will be connected, where additional systems (like in-home batteries) will be placed, and so on. This may take longer for particularly large or complex solar arrays, but most homeowners can expect to get the plan within 3 weeks or sooner.

  • MILESTONE 4: PERMIT SUBMISSION

    Once all documents have been signed and returned, the permit request will be submitted to the appropriate department. It can take up to a Milestone for the permit to be delivered, as your installation company may need to provide other information as well, and that data could take a few days to acquire.

  • MILESTONE 5: PERMIT APPROVAL

    This is where things get a bit tricky – and unfortunately, we can’t give you a perfect estimate on this. The length of time it takes to get a permit approved varies by region – some places can get them done in minutes, while others may take several weeks to stamp a seal on it, and that’s assuming there’s no reason to deny the permit. The only thing to do here is wait, although you can ask for an estimate of approval times in your area to get a better idea of how long it will take, a step we encourage you to do on Milestone 1.

  • MILESTONE 6: SCHEDULING THE INSTALLATION

    Once the permit is approved, the actual installation will be scheduled. This typically occurs sometime over the next two weeks, and on average it can be one Milestone until things get started. Many different variables go into this, but once you have a date, it’s usually pretty solid. If schedules need to be changed, you’ll be notified as soon as possible.

  • MILESTONE 7: INSTALLATION

    Actually installing the solar panels – finally – generally takes one or two days. As before, particularly large or complex systems may need more time, and you’ll be told what to expect before the workers get started.

  • MILESTONE 8: INSPECTION

    The local jurisdiction inspects the installation of the system. Once approved, the local jurisdiction sends the approval to the local utility company.

  • MILESTONE 9: COMMISSIONING (TURNING SYSTEM ON)

    The Local utility company will inspect the system, and if approve, set a bidirectional meter and allow the system to turn on..

  • MILESTONE 10: FINAL STEPS

    While about 2 months is normal for a solar panel installation process, there are many things that can influence it. For example, if permits can be submitted right away, followed by quick approval and an installation time just two or three days later – the overall installation time could be cut in half. On the other hand, some things may take longer – especially the permit approval process, which could easily double the length of this timeline. The bottom line is that there’s no exact guarantee on the timeline.