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Journey to Solar – Part Three, Auditing & Evaluation

After determining that you want to go solar and deciding how you want to finance your project, you move on to making final decisions about your system and energy needs.

At this point, the solar company sends out an engineering team to verify that the initial architectural plan is doable and feasible. The team gets up on the roof, crawls through the attic, checks the current electrical system, and takes lots of lots of measurements and pictures.

This all leads to the final architectural plan. In our case, it did vary slightly from the original plan. The actual capacity of our roof to house the panels was a bit off, and our system is going to be just slightly less powerful than the original plan.

After the final solar architecture is done, the next step in Solar City’s process is to conduct a Home Energy Evaluation, a comprehensive audit of how your homes uses – and loses – energy.

During the evaluation, a team of people arrive your house, crawl through your attic, check your heating and air conditioning systems, and use crazy contraptions like these…

…to analyze the “leakage” of your heating and cooling systems.

They also check every appliance, every light bulb, and every window and crevice of your home.

They crunch all that information and provide you with a report card of the energy usage of your home.

The good news for us is that overall, our home is pretty efficient. It is well insulated, with little “leakage” of air from the outside in, and vice versa. Our dual-speed pool pump is a huge savings, as well as our LED and CFL light bulbs.

A few things they did recommend: eliminate one or more refrigerators (we have a kitchen fridge, garage fridge, wine refrigerator, and kegorator – yes, I know, it’s total over consumption – perhaps the next episode of ecofessions?); upgrade to more efficient air conditioning units; add an extra layer of insulation in the attic; and continue replacing any remaining incandescent lights with LED or CFL bulbs.

The good news is that although our system is slightly smaller than originally planned, by incorporating some of these energy-saving measures, we can keep our solar energy to on-the-grid energy ratio in tact from the original plan.

So now we are one step closer in the process. One step closer to our goal of living off-the-grid as much as possible. Getting closer…

Next up…part four, applying for government rebates and getting association approval (the most entertaining part so far, I promise).

Related Posts:

Journey to Solar – Part One, Making the Decision

Journey to Solar – Part Two, Financing

Journey to Solar – Part Two, Financing

Once you make the decision to go solar, the next step is deciding how you want to pay for it.

Solar has come a long way from the days of buying the panels outright.

Today’s solar is flexible and can accommodate many different budgets.

There are basically three ways to go solar:

1. Purchase – this is the oldest and was the most common way to go solar years ago. Basically, you purchase the system, and apply for and receive all your rebates from the Federal and State government directly. Once you have the system installed, it is yours forever, but you are on your own for maintenance and service outside of the warranties. These days, very few customers go with this option.

2. Pre-Pay – This relatively new plan allows you to “pre-pay” your solar energy usage for a set period of time – generally 20 years. You pay a set amount upon installation of your solar panels – essentially, what you would pay for the kilowatt hours (kWh) at today’s rates, and then get all of your solar energy at no additional cost for the next 20 years. In fact, if your solar system does not generate the guaranteed amount of kWh on an annual basis, the solar company will be sending a check to you each year. At the end of the twenty years, you can renew your plan (at discounted rates) or turn the solar panels back in to the company. This plan includes system monitoring, repair service, insurance coverage, and a performance guarantee for the duration of the contract term.

3. Solar lease or Solar PPA – Both of these options essentially boil down to a zero-money-down situation, where you pay a monthly amount to the solar company once your panels are installed and up and running. They offer similar financial advantages to the homeowner. The primary difference is that with a lease you pay a set amount per month, and with a PPA you pay per kWh. One of the benefits of the SolarPPA is that you can purchase the system any time after year five. Availability of SolarPPA and SolarLease vary by location based on what your local utility company prefers. This plan also includes a “buy-out” at the end of the term, or turning panels back in to the solar provider (if they even want them at that point). Both of these plans offer flexible payment options, system monitoring, repair service, insurance coverage, and a performance guarantee for the duration of the contract term.

One thing I like about going with a full-service company like Solar City, is that regardless of which payment option you choose, they take care of every step of the process —including engineering, financing, permits, installation and ongoing monitoring.

In our situation, the Pre-Pay plan was the best deal by far – even better than purchase. With an initial investment of $22,000, it was calculated that we would save $90,000 in energy costs over the twenty-year period. With the payment plan, we could invest nothing initially, pay a set $235 per month for twenty years, and save around $60,000 in energy costs over the lifetime of our contract.

So our decision was whether we finance through the solar company at a set price of $235 per month – effectively paying them $53,000 over twenty years, or find a way to pay them an initial investment of $22,000 (even if we have to borrow money to put that down). For us, the flat fee of $22,000 made more sense. Money is so cheap these days, with interest rates at all-time lows, we just think that the initial payment makes sense financially. If you have access to cheap money through a line of credit, or savings, or even selling some investments, I think it makes sense. I mean, what investment is going to guarantee a return of $90,000 over the next twenty years?

In both scenarios, we would still have a small electric bill depending upon our energy usage. Also, it was projected that we would save a few thousand dollars on our electric bill per year initially, but that amount moved up to almost $9000 per year in year twenty of our agreement. The reason the savings are so high is that unlike electricity, the payment to the solar company is set per month, with no increase, over the course of twenty years.

With energy prices rising approximately 39% over the past decade, and estimated to continue, by locking in your energy costs now, you save a bundle over the next couple of decades.

Even if we decide to sell our house, the solar agreement is transferable, or we can transfer the solar panels to a new home. What’s more, homes that have solar panels are shown to increase in value by 3-4%, which for most people, covers the cost of the system.

But everyone’s situation is different and each buyer has to make the decision that is right for them. The bottom line is that no matter what option you choose, you are going to save money in the long-term by going solar.

For more on solar financing options, you can check out this link.