Our power costs are CHEAP here in the MidWest!

I just read a blog at my friend’s website (www.runonsun.com) and learned that folks in California are paying 22 Cents/Kwh for their electricity. That’s over TWICE what we pay here in the MidWest. This is very likely the reason there’s so much residential solar built up out West. Our energy prices here in Ohio, Indiana, Kentucky and Pennsylvania are all around 10 cents/Kwh, and we are blessed. But don’t think that our prices won’t go up. Coal fired plants are being closed every week because they are old, obsolete, or simply can’t meet the new EPA standards for particulate emissions. Yes, there are new gas turbine power plants being built, and yes, we are using LESS electricity (as a Country) than ever before, but this is not a balanced equation. Our prices have been held low due to coal subsidies from the government, and these will disappear with the coal plants. Solar panel pricing has bottomed out and prices are stabilizing in the 79 to 90 cents/watt range. We might squeeze a few percent out of inverter costs, but for now, we are riding near the all time price lows for residential AND commercial solar PV systems. It might be time to plan on installing that dream system in the early Spring, before demand begins to force component pricing to rise…

Best wishes and sunny days!
Joe

Warrantee work at East Fork

Had a small problem with an SMA Sunny Island grid backup inverter (6KW). After sending SMA the Smart Card data, they promptly sent out a replacement and even included return shipping! Back up and running and customer is a happy camper once again. Based on this event, I would highly recommend you look at the SMA Sunny Island if you’re planning a Grid backup or even OFF-grid system! Sorry, I forgot my camera this trip!

Finish phase 2 expansion at East Fork Stables

Racking goes up at East Fork Stables

Cinci Home Solar works with EFS to get racking up using 50% on hand materials.

Missed this photo on the first part of this adventure. The owner had materials on hand, and made the posts of Steel L channel, the beams from Steel S-channel, and the barn support brackets from 2 inch steel L material. The owner (George) is a VERY resourceful fellow – some might call him a scrounger, but I call him SMART! I passed along a great vendor deal on the solar panels and he purchased them direct. The BOS (balance of system) materials was purchased through Cinci Home Solar at great pricing, bringing the whole project in at about $3/watt, and this includes the battery bank and backup power inverters in addition to the Enphase micro-inverters behind each panel. The work was spread over 4 full days, with the helper crew varying from 1 to 3 guys and myself. Plenty of manpower to get this rather large project done in a timely fashion. Winter is really variable in Cincinnati, and whenever the weather was predicted to be above 40 and sunny, George called and we got the job done. Fortunately, this job was a quick drive from my home, and it wasn’t a problem. Normally, these 3 or 4 days would have been all condensed into one extended visit! I aim to please, whenever possible…

 

DIY Solar array expansion by Cinci Home Solar

DIY Solar expansion -adding 2 more rows to bottom of 32 panel array.

After we finished the 32 panel array, George saw that some minor grading of the ground near the bottom would allow plenty of room for 2 more rows! A week later he called me and said “Hey Joe, come on out and lets get these 2 rows installed – tomorrow’s weather looks great. So we did!  When I ordered the extra components, we also added 8 more rails – one under each of the 8 columns of the upper 4 rows. You can see them mid-panel in the picture to the right. This provided the extra strength and rigidity that the span required for both wind and snow loading. Splicing the extra rails that extend to the newly installed lower beam also provided a counterbalance to the free span above.
The two missing panels at the lower left were intentionally left off because of a stone access road to the hay barn that George didn’t want to move.

 

DIY Solar install of Enphase M215 Micro-inverters

DIY Solar installation of Enphase M215 Micro-inverters.

This is what the backside looks like after everything is in place. After the rails were set, the Enphase M215 Micro-inverters were mounted. Then the #6 bare copper ground wire was run in series to each inverter. We grounded BOTH ends of the #6 copper, just because we could. Next came the Enphase TRUNK Cable, mounted with stainless steel clips to the rails. Then the panels were added, the micros were plugged in to the trunk cable and the panel leads connected to the micros. One end of the trunk cable is sealed with a weather tight cap, and the other goes to a weatherproof junction box (white) to transition to standard exterior rated 12-3 with ground romex. The romex connects to a breaker box with a 20 amp 2 pole breaker for each string of 16 and 1 string of 14 panels. Then, the entire array is nicely dressed using tie wraps so that all the wiring is suspended between the panels and the bottom of the rails to keep it from whipping in the wind or getting snagged by anything.

 

 

Power panel mounted below array

Power Panel beneath the array, mounted to the side of the hay barn.

Here’s the power panel. Public Utility Commission in Ohio says any array over 6Kw must be metered by a UTILITY GRADE meter. Got one on Ebay for $35. Breaker box on left contains the 3 solar breakers. That feeds through the meter to the master breaker box on the right. Master breaker box connects to the utility grid via a buried conduit over to the other barn that had power in it already. Below the utility grade meter is the Enphase ENVOY monitoring unit that ties all this to the internet so George can watch things from his home computer. He can share a link with his friends as well. I’ll post this link soon as I get it from George! The Utility voltage here is rather high – close to the limits for most inverters, at 254Vac. This causes a few of the inverters to occasionally shut down (to protect themselves). I’ll be looking into this further on my next visit to see how we might correct this…

 

Almost finished array by Cinci Home Solar

Almost finished DIY solar array accomplished with a little help from Cinci Home Solar!

Here’s the finished array. Still need to trim the excess rail length at the bottoms. If you look close, you might just spot some mis-alignment within the array. George got 2 pallets of panels. Same part number, same vendor, but one pallet was 1/2 inch shorter on the long side (out of spec…). We didn’t catch this till 5 were mounted in the top row. George, being a prudent and thrifty fellow, called the panel supplier and negotiated a compromise that didn’t require a return of the panels. The size only affects the esthetics slightly, and a cost reduction is pending!  The Enphase ENVOY normally communicates over the power lines, but there’s a half mile of them back to the house and that’s too far for it to work, so I added an Engenius EOC-1650 at the house as an access point, and atop the array as a client/bridge. It works great – with 100% signal integrity, and also provides WIFI to his customers and visitors! The EOC-1650 is that little white gadget at the top right of the array.

What it takes to keep your power UP when the grid is DOWN!

It’s been a long time coming, and I’ve been hesitant to make the investment, but recent power outages caused by the weather, combined with the state of affairs around the globe, have given me the motivation to finally make it happen. Please come back here at least twice a month to check my progress on this project! I’m doing this at my “bunker” in the mountains of Ohio. I’ve already got a 2400 watt system running using the older Enphase M190 micro-inverters along with 12 assorted PV Panels, and it’s covering 90 to 100% of the electric bill. But, I lost a refrigerator full of food when the power was down for too many days… so, I’m adding all the parts to keep the power flowing when the grid is down! Here’s a list of the parts I’ve got on the way:

  • Magnum Distribution panel 250/30A-2P
  • Magnum MS-PAE 4024AE 4kW 240VAC Pure Sine Inverter
  • Magnum LCD Remote Panel (for programming and monitoring inverter status)
  • Magnum BP-MMP Metal Mount for MMP enclosure and inverter
  • ROLLS 6V 530AH Wet 40000S EKG Battery (X4=24 Vdc)
  • Battery Box fan 24volt, 6 CFM
  • ROLLS R+ Recombination Caps (X12) keeps battery watering to a minimum
  • Outback Spill Control Tray for the batteries – in case of a case crack or acid spill
  • #4/0 gauge flex wire with lugs for battery interconnections and inverter hookup

There’s also a whole house SMART SWITCH and some other parts to modify the incoming service wiring…

That pile of parts is worth about $4500 if you’re considering doing this. Well worth the price if the grid goes down for ANY reason! I’ll take pictures as I go and do updates to describe my trials and tribulations!
DIY Solar is affordable and reliable ( and a great way to prepare for Zombie Armageddon ) just kidding… and have a SUNNY day!

DIY Solar Install getting great results

DIY Solar - March electric bill

March 2012 Electric Comparison from Duke Energy

I’ve been getting great results with the system I installed on our home in Newtown, Ohio. Lately it’s been pretty cool and the days are getting longer. My 20 panel system generates a maximum of 4.3 kilowatts of power and the days are now long enough to pass 30KW Hours in a single day! Sometimes when LENTICULAR clouds go over and CONCENTRATE the sun’s energy, the panels have gone as high as 4,500 watts! No matter how you slice it though, the solar is doing it’s job nicely, as you can see from the info sheet that the power comnpany sent out… it’s funny, the paragraph below the one shown says “you can STILL lower your bill farther!” I don’t think that’s possible!!