So, you are considering a solar power system for your home or business… and why not, given the myriad of social, environmental and economic benefits! But how do you know if your roof is a good candidate? This is one of the top questions to consider carefully before investing in solar.
The size of your solar system is dependent on your usage needs and the amount you want to offset. However, it is not uncommon to find homes and businesses which are “footprint-constrained” - meaning their system size is limited by the space available.
A few things to keep in mind as you look at your roof and ponder how big is big enough… First, while there are many different solar panels they are typically the same size. Run on Sun uses LG panels which are about 65 x 40 inches and can be placed in either a portrait or landscape layout. Panel energy ratings vary, 280-305 watt panels are currently available from LG. For an average home (5 kW) that means you would need around 16-18 panels to offset the bulk of your electricity.
Another limitation is that the fire code requires three feet of clear space from all ridges. If you have an irregular shaped roof with many valleys and peaks it may make the layout very challenging. Given that the panels are rectangular and racking is mounted parallel to the roof, rectangular spaces are ideal.
Shading from trees, tall buildings, chimneys, or even parapets on flat roofs can significantly degrade the energy output from solar panels. Sometimes all that needs to be done is a generous trimming of that tree that’s gotten a little out of control over the years. Other times it means you really won’t get your money’s worth out of a solar system. But, if the shade elements are few and only during a short time each day, your roof may still be a viable candidate.
If this is the case be sure to talk to your solar contractor about inverters. We have written a great deal about the advantages of “microinverters” in handling shaded roofs, particularly those made by Enphase Energy. “String inverters” on the other hand would be a bad choice as the entire system would degrade when any single panel is shaded.
This may be the most important and frequently overlooked question to consider when researching if solar is right for you. Part of what makes solar a great investment is the 25+ year lifetime of the system. But if you have to re-roof during that time there are added costs to remove and re-install the system. If you are planning to re-roof during the lifetime of your solar array be sure you select components, such as the racking system, from companies that…A. will still be around 15-25 years later, and B. will be able to provide compatible replacement parts when pieces are lost during removal and re-installation. Avoid newer companies testing out “state-of-the-art” racking systems and cheap companies banking on the solar boom alone.
For this reason we always ask owners the age of their roof. In southern California, a roof over ten years old should get a makeover before installing solar. If you are unsure of the condition, it is a good idea to have a professional roofer take a look and give you an expert opinion. Sometimes solar contractors can offer this as part of their free assessment. (Run on Sun works with a very reliable roofer who is happy to take a look at any roof in question!) If the roof still has some life left in it but not enough to outlast the solar system you could re-roof only the area where the solar array will cover and plan to do the rest later. An added benefit is that the solar panels will actually protect your roof from the elements, helping it to last longer.
Unfortunately, you will likely be able to find someone willing to put solar on your roof even if it isn’t a good candidate. But if they aren’t discussing the above issues with you, then red flags should be flying! To ensure you get the best investment possible, do your research, take a good long look at your roof, and discuss all of your concerns with your solar contractor.
Pasadena Water & Power (PWP) is about to slash its rebates by as much as 55% effective May 1 - the first rebate reduction in three years. Here are the details…
We have said it before and we will say it again, our hometown utility gets the highest marks for running the best, hands down, rebate program around. Their folks are responsive, they have offered a consistent program since we got into this business, and their rebates have been among the highest offered in our service area. The present rebate rates: $0.85/Watt for residential and small commercial, $1.60/Watt for small non-profit systems have been at that level since 2012 - even while system prices dropped by 25%. (For large systems > 30 kW, the commercial rebate was 12.9¢/kWh of actual production paid over five years, while the non-profit version was 24.2¢/kWh.)
But all good things must end, including these great rebates - and they will, come May 1.
The new rates are significantly less generous - $0.45/Watt for residential and small commercial, $0.90/Watt for small non-profit. For larger systems the change is even more dramatic, with the rebate payout now only covering two years of production (instead of five) at the rate of 14.4¢/kWh for commercial and 28.8¢/kWh for non-profit. (One bit of good news, the threshold for systems to be paid rebates over two years instead of at commissioning is going up from 30 kW to 100 kW.)
So what do these rebate reductions really mean? Let’s look at a few examples.
A typical residential project of 5 kW (AC) that submitted a rebate application before May 1 would secure a rebate worth $4,250 (as opposed to na da in SCE territory). That same system will only receive a rebate of $2,250 - leaving an even $2,000 on the table. Ouch!
A 50 kW non-profit project would earn, over the next five years, a rebate worth approximately $92,400. But after May 1, only two years of payments will be made worth just $44,600 - a 52% reduction, leaving $47,850 blowin’ in the wind. Double ouch! The one side benefit, since this project is smaller than 100 kW (even though it is over the old, 30 kW threshold) it could qualify for the up-front rebate of approximately $39,200 at the time the system is commissioned - less money overall, but you get it faster.
A commercial project of 150 kW under today’s rebates would earn roughly $148,000 over five years, but for rebate applications submitted after May 1, that rebate drops to just $66,900, a reduction of 54.7% leaving nearly $81,000 waving bye-bye. Brutal.
All is not lost, yet. We still have a month and if you act RIGHT NOW you can still take advantage of the higher rebate rates! To lock-in the higher rebate, we need to get your energy usage, do a site evaluation, send you a proposal, have you accept the proposal and sign a contract, and we need to get your rebate application on file before May 1. (I feel a bit like our friends at KPCC - “we need 67 people to call in the next five minutes to meet this challenge…") Yeah, that’s a fair amount of work in a short time, but if you jump on this opportunity, we can make it happen and you can save some serious money! So don’t miss the boat… Call us, or click on the “Let’s get started” link here to begin.
New year, same battle.
We have reported for some time about efforts by the Investor-Owned Utilities (IOUs) like Pacific Gas & Electric (PG&E) to do what they can to make rooftop solar less attractive, if not kill it outright. This report from NPR demonstrates how that fight is playing out here in California, and elsewhere.
As we begin the new year, this story is an important reminder that supportive public policy doesn’t just happen, and there are forces arrayed against this industry that would like nothing more than to make rooftop solar - the sort that homes and businesses can use - go away completely. (Ironically, this is at the same time that utilities are investing ever more in their own solar facilities - such as this one in Colorado, or this one in California - as a hedge against carbon regulations and unpredictable fossil fuel prices.)
If we are to defend and expand the ability of average home and business owners to lower their bills while reducing their carbon footprint, we will need to be proactive this year in supporting the policies, and politicians, that allow that to happen.
Just in time for the start of the holiday shopping season, we are pleased to be offering Founder & CEO, Jim Jenal’s hit solar sensation, Commercial Solar: Step-by-Step at fantastic savings. What could be a better gift for the solar fans on your shopping list?
“I thought it would be dry like a textbook, but it reads like a novel!” Laurel Hamilton
Starting at 8:00 a.m. on Friday through Midnight on Monday night, you can purchase the Kindle e-book for just 99¢ - that’s 80% off the regular price! Still like your books in paper? No worries, we’ve got you covered there, too! The paperback edition is available for sale from our Run on Sun online store for just $5.95 - 40% off the list price!
“Whether you’re a potential solar customer interested in how to go solar or commercial solar sales professional, this is a must read–and I work for Jenal’s competitors.” Tor - Solar Fred - Valenza
So set your clocks and don’t miss out on this rare opportunity to own the most highly praised book about Commercial Solar available anywhere!
“Jim Jenal’s guide to commercial solar is a thorough, quick, and easy read. The text is manage-ably dense with information, but chatty and easy to understand. Jim knows what he’s talking about, which is nice for those of us who do not. The process is laid out in step-by-step instructions with examples to illustrate all parts. Thanks, Jim, for making commercial solar seem attainable.” Evyn Larson
We wrote back in May about the number of solar permits that were pulled in March of this year statewide for solar (PV) installs and were surprised to see San Bernardino county leading the field and in a big way. Well we just got a peak at the data for July—what surprises might it bring?
Compared to the March data, things have really heated up, with the statewide total of 6,521 permits representing a 67% increase over the previously reported 3,901 permits! Our leader board has changed dramatically as well, with San Diego County grabbing the top spot with 10.5% of the statewide total. San Bernardino drops from first to seventh, while Los Angeles County—far and away the state’s population leader—was just barely able to beat out tiny Placer county (home to a twenty-seventh of LA’s population).
Unfortunately the data does not report the size of these projects, merely their valuation, which can be an unreliable data point since it is not verified in the permitting process. In any event, total valuation for the month was in excess of $105 million, with Riverside county taking the lead ($13.9 million), followed by Orange ($7.9), Fresno ($7.5), Kern ($7.4) and then San Diego ($6.8). PV valuation in LA County was just $4.8 million. Of course, give the nightmare of doing business in LA County’s largest city—a topic we have discussed previously, and one to which we will return in future posts—LA County’s laggard numbers should come as no surprise.