In the last post, we mounted the solar panel array. Now it was time for the solar power system low-voltage wiring. The array is about 50 feet from my shop, where the batteries and inverter are located. I planned to use two strands of #6 UF direct-bury cable to conduct the predicted maximum of 36 amperes to the shop.
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In a previous post, we selected a site, cleared trees and installed foundations. Now we were ready for framing. There were four 8-inch concrete piers defining the four corners of the array. The plan was to mount two 10-foot 4-by-4 … Continue reading →
With the Solar Generator Project underway, it is time to mount the solar panel array. Last May, I purchased eight Renogy 270-watt solar panels similar to those in the Solar Rainwater Project. At 65 by 39-inches, and weighing 65 lbs., they require a substantial mounting system. In the Solar Rainwater System, I had the advantage of an existing building with a south-facing roof that could hold four panels.
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Two years ago, I installed a small solar system to pump water at the ranch. This solar generator makes us independent from the grid by insuring we can always pump water — even in a grid down event. I’ve learned a lot about solar power and want to continue. What about refrigeration? In a power failure we cannot refrigerate food or produce ice.
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The Solar Powered Rainwater Project began about eight months ago, although one might argue it is the culmination of my rainwater system dreams beginning in 2002.
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The solar-powered rainwater system was complete — except for more panels, and a cable to isolate the rainwater power from the rest of the system. Construction on the rainwater system began in 2002, when I trenched the various wires and pipes into the ground. I needed power for the rainwater system, and tapped into an underground wire originally intended to supply power to the well.
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With all the parts in stock, it was time to assemble the whole Solar Powered Rainwater Project. I cleaned out a space in the garden shed, and added plywood to the wall for attaching the various components. We would be mounting the inverter/charge controller, solar panel combiner/breakers, A/C transfer switch and related wiring.
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You may recall from an earlier post that the Solar Powered Rainwater Project requires substantial battery storage. In our original calculations, we decided we would need 15,796 watt/hours of storage to provide three days of autonomy (or days without sun).
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It’s been a while since I reported on the Solar Powered Rainwater Project. Since that early-April post, I’ve been gathering the rest of the parts, and we took our annual trip to the Red Power Roundup — this year at the Iowa State Fair in Des Moines. The biggest part of the delay was waiting for the inverter/charge controller. I wasn’t thrilled with the delivery delay on the device, but it turned out well in the end.
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The new 250-watt solar panels arrived very quickly. I was eager to install them, but they were just a bit larger than I could handle safely on the garden shed roof. Fortunately, I didn’t have too wait long, and my neighbor Jason was available a few days later.
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