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Presently designing a 15KW DIY grid tie system. There will be two 80' long panel arrays. I need a resource that will help me determine the spacing between the two rows so that the more southerly one does not shade the 2nd array. It's not a simple a geometry problem as you might think. thx in...

Grid tie solar so no power if the utility is down. RV has a 7500 watt gen and very large gas tank (100 gal) which is always full waiting for the next road trip so power would be available for even an extended outage. Cost to install was just over $1000 for the outside isolation breaker, 4 pole...

In the design phase for a system. I will need some disconnects and they always have ratings for AC. Does NEC require any different ratings for DC? I'm thinking specifically of the disconnects for the DC feeds from the panel strings. thx to anyone taking the time to offer advice. mark in MN

I am in the design stage for a ground mounted grid tie solar system. I've seen that RSD's are required for roof mount solar but have been unable to determine if they are required for a ground mount system. Doesn't seem like they would be needed if the inverters were mounted on the PV structure...

I am in the design stage for a ground mounted grid tie solar system. I've seen that RSD's are required for roof mount solar but have been unable to determine if they are required for a ground mount system. Doesn't seem like they would be needed if the inverters were mounted on the PV...

What is the projected life of a conventional solar panel? Assuming it is kept clean does it's output decrease over time? Is there a graph of output vs. age? thx to anyone taking the time to share info or links. mark in MN

Ground mount grid tie system design questions. Panel string (310w. X 11) will max out at approx 525v DC and approx 13 amps. Big box store THHN 14ga. wire rated at 600v. per string would be adequate if I did my numbers right. Tentative design is 4 strings DC fed approx 90' conduit to...

Central MN. 60mph typical max for winds. (never seen it higher than that in 20 years.) I am presently researching option for the supporting structure design for a ground mounted fixed array of 50 panels. Options are wood or steel. Wondering what arrangements are used to secure the panel...

ground mount. Looking at pics many of the designs have support members running under and parallel to each side frame of the panels. Other merely have support elements running at right angles to the panel frames which makes for a far simpler structure. support elements paralleling the panel...

panels are 73" tall mounted at 45 degrees with bottom 1' above grade oriented straight south. zip is 56310 what is min space between rows to prevent shading even in winter with sun low in the sky? thx to anyone better at the geometry than me. mark in MN

I figure someone else has already had this idea so I thought I'd solicit input here. For reasons unrelated to a back up power system I am considering replacing my diesel UTV with an electric one. As I researched the elec utv it occurred to me that the battery bank in the utv represents a...

Rookie here. In the planning stages. Initial estimates indicate I'll need a charge controller rated for 100+ amps. Looking for a reason NOT to go instead with a split system and 2 smaller (60amp) controllers with independent but identical battery banks. cheaper and has redundancy. I can't...