Solar Owners Fear Squirrel Apocolypse!

Yes I said squirrel apocalypse! These furry monsters can be harbingers destruction to your solar array. This past spring we’ve had three calls of customers whose solar arrays were not working properly. In all three cases a service call quickly determined that squirrels had made a nest under the array and chewed through the pv wire. Why do they like to chew pv wire I have no idea but squirrel damage is not covered under any warrantee. The damage they caused was extensive and took many hours or wire splicing and replacement.

Most homeowners never consider the possibility of squirrels damaging their array. After you’ve seen pictures of the damage they can do you will not think they are so cute anymore. Luckily critter guards can be installed around the outside of the array to keep them out and are barely visible from the ground. If you are considering buying solar you should insist on this at installation. I have started quoting this standard for my customers. It will cost a little extra but it’s a necessity not a luxury if you live in the average American subdivision.
If you don’t have this extra protection and own a solar system I highly recommend you get it now or suffer the squirrel apocalypse!

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Taking your Well Pump Off Grid is a Viable Solar Option!

Let’s say the grid goes down for an extended period of time. The first day or two was not so bad. But now you are in survival mode. You may have a grill, propane or wood for a fire. So you have heat and can cook. But how long will you last with-out water? Where will you get it once what you have has run out?
This is a common concern voiced to me by many customers. So I went to work designing a solution that would use solar energy to take your home well pump off grid, last longer than any generator, be easy to maintain and give you water out of the faucet.
Using solar panels for well pumping applications has long been used in remote areas mainly in agricultural applications. A simple system can be designed where a few panels produce DC current and power a DC well pump. Water is lifted and fills a cistern until a float switch turns off the circuit when full.
This works well for irrigation and cattle but how about a home? Generally speaking you are not going to want to pump water to an elevated holding tank or cistern above ground and store it to drink later. The reason being that if the holding tank is not pressurized sooner or later bacteria will invade it. Legionnaire’s disease is a concern as well as the possibility of the tank freezing in winter. So is there any better option?

Here is a system I designed for a customer in Apex NC. It has 4- 235 watt solar panels on the roof with a small inverter and battery system specifically to take the well pump’s 20 amp 2 pole circuit breaker off grid! Now he is reducing his electric bill but more importantly he will have water if the grid goes down. This system has 4 deep cycle sealed gel batteries which are maintenance free. They will give him hours of continuous water pumping before they need to be recharged which the sun will do for you. The battery life time is determined by how much and how deeply you cycle the batteries. If you want to keep the batteries in stand bye so they last longer there is a switch that allows you to bypass the inverter and power the well pump using the grid. A third switch allows you to recharge the batteries using a generator or grid if necessary. A generator is no good after you run out of fuel, this system will run years off grid with only the sun to power it.
Posted in NABCEP, Off Grid Solar Systems, PV installations, Tax Credits for Solar in NC | Tagged , , , , , | 1 Comment

Solar Buyers Beware! Three stories from the front lines. Don’t let this be you!

I think we as americans in general have all heard the saying, “Its buyer beware!”  For a solar customer this is no exception.  In my years in the industry I have for the most part met fellow industry workers whom I can only describe as very kind, passionate, responsible collegues.  From what I’ve seen the majority understand that as representatives of an emerging industry we are responsible for how solar is percieved.  One happy solar customer tells a few friends but one unhappy customer tells everyone!

Unfortunately I’ve recently been seeing more and more horror stories from the front lines.  Customers who had a bad experience or were taken advantage of by a contractor.  With the economy in recession the solar industry has attracted many people seeking to change careers.  Some of those people have jumped in with no experience looking to make a buck.  As a result the number of unqualified installers is growing.  Here are 3 stories I’ve personally experienced from customers.

Beware of grandiose claims and understand what you are purchasing!

A Bad Install
1.)  Last month we had a customer call us saying he had a contractor install a solar water heating system with a heating coil connected to his HVAC system.  He paid $18,000.  The claim was that this system would heat his domestic hot water and in the winter supplement the heating load for his HVAC system.  It consisted of an 80 gallon storage tank with 2 solar collectors mounted on a steep west facing roof.  He claims the water was not getting hot and the coil to his HVAC system did nothing to reduce his bills.  He was very upset and plans to sue the installer.  In my opinon this should never had been sold to the customer and it seems both the customer and installer did not have a clear understanding of what it would do.   A steeply angled west facing hot water system will only produce about 80% max of what a southern facing hot water system will produce.  It will also produce very poorly in the colder months because there are less hours of sunlight, the angle of incidence is poor so the sun that does hit the panels will mainly glance off in the winter and the ambient air temperature is very low during the months he presumably wants the most heat production.  The most this customer can hope for enough to heat his water for showers and dishes during the summer months when the sun is more directly striking the panels and ambient temperature is higher.  Also the cost of the system was pretty high.  A normal hot water install would go for around 7,000-9,000 depending on the site.  So he pretty much paid 10,000 for a heating loop that was never going to work properly!

Bad Product
2.) A second customer came into my office saying he purchased an off grid solar battery back up system from Northern Tool’s website.  He admits that he purchased it not knowing exactly how much power he would get out of it and wanted me to explain if I could what home loads he would be able to run and for how long before the batteries needed to be recharged.  He said it was sold to him with the impression it could power the major circuits of his house.  He paid $2000.  After doing some math it was aparent that his expectations were way out of line with what the systems capabilities were.  The batteries has 1.5kw hours of capacity.   That is enough to power a microwave for 1.5 hours or 15 – 100 watt light bulbs for 1.5 hours.  It would not power larger loads like his refridgerator at all.  There were 2 solar panels he thought would help power the system however they were 100 watt panels.  At that rate it would take 11 hours of full sunlight to fully recharge the system.  So if the power ever went out he would be able to power a few lights for a few hours then he would have to charge the system for 2 or 3 days to fully recharge his batteries.  Again, it seems this system was not what it was made out to be and the customer did not have a clear understanding of what he was purchasing.

Purchasing Kits Online
3.)  I like to say “We live in the Walmart age” meaning as shoppers we’ve become conditioned to search and search for the cheapest price with the understanding we can always get it for less somewhere else.   I recently stopped a customer from making a costly mistake.  I spoke to a customer on the phone who was interested in a 5 kwDC system.  I quoted him a price installed.   He then went online to try to do some detective work and see if he could figure out exactly what the cost of materials would be if he bought them himself.  He emailed me back a link he found online of a kit for sale less than half of what I quoted him with kind of a snotty email saying asking if the rest was labor.  I checked out the link he sent me and guess what?  It wasn’t what it was made out to be.  First of all the panels were a very low wattage and low efficiency of 120W, normal wattage is 230-240 these days.  So they were probably an older model of panel on clearance.  There was an inverter a fusebox, a surge arrestor and 50 feet of wire.   Sound like anything is missing?  There was no mounting system at all!  If he would have purchased this how would he put it on his roof by nailing it down?  Also the fact that the panels were such low wattage meant that to get the full 5 kw DC he would need  42 panels and that would not fit on this roof.  The lower the efficiency of the panel the less watts you can fit on a given space. Also missing from the kit was proper system grounding and other misc items.
Luckily for that guy I stopped him from making a mistake that would have cost him several thousands of dollars but many people purchase kits online not knowing exactly what they are getting or what is missing.

Lessons Learned
These are just a few recent examples of customers who made mistakes with their solar purchase.  I truely wish none of them had ever happened.  Remember to always  always use a reputable contractor, the best thing you can do is insist to see and check your solar installers NABCEP certification.  NABCEP ‘s goal is to raise the standards of solar installation and demand all installers follow a code of ethics.  Its not easy to get that certification either I know!  Also check the references of your contractor, ask to see some of their work and do your price shopping with the understanding in mind that you will get what you pay for.  Finally, make sure you understand what you are purchasing!  Know the products used, what its expected performance will be as well as maintenance needed.  I hope these stories help you my readers avoid the same or similar mistakes.

 

 

 

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An Explanation of Solar Tax Credits offered to NC Home Owners

To get the quickest pay back on your solar system you will want to take full advantage of any tax credits available.  I’ve outlined the basics about the personal Federal and State Solar tax credits available to North Carolinians and … Continue reading

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Thoughts on the Solar Industry’s black eye called Solyndra.

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The Solyndra debacle has recently become a black eye for The American Solar Industry. A black eye that has not gone away and one that I fear will not go away for some time because the issue is now being … Continue reading

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Thinking of going off the grid? Here’s what you can expect. “A look at solar PV systems with battery back up.”

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“Why can’t I just go off the grid?”  That’s a question I hear from about a third of the people who call me interested in solar.  Some of them are very persistent as well.  “If I’m paying thousands of dollars … Continue reading

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Hurricane Irene makes solar owners think, “What If?”

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The area that got hit hardest was the coast. But for the rest of us hurricane Irene was a close call. However it got me and thousands of others thinking “what if?” and go re-read our homeowners insurance policies. So … Continue reading

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TIGO vs Enphase? (TIGO wins…big time!)

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Until recently I haven’t known the answer to this big question, who performs better TIGO or Enphase? Answer… TIGO blows Enphase out of the water! I’ve installed many Fronius, SMA and PVpowered String inverter systems as well as Enphase systems … Continue reading

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Should I use TIGO or Enphase?

I’ve been in the solar industry for 4 years and have heard this question over and over industry people as well as customers. Not wanting to seem a pushy salesman I’ve always tried to empower my customers with information and … Continue reading

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I passed the NABCEP Exam!

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I passed my NABCEP PV installer exam!  I was so excited when the certificate came in the mail I shouted “Whoo hooo!” and the guy next door cutting his grass looked at me like I was crazy.  It was a long journey from … Continue reading

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