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I’ve just completed, well, other than a couple details, my 7.5 kw grid tied system. 24 Canadian solar 315 w panels, Enphase 7+ MI and Combiner panel and Iron ridge flush mount rack on my shop. I was a solar contractor back in the thermal days of the 70’s, until Ronald Reagan drove a stake...

I represented Rinnai for 27 yrs. you are miss reading the specs. Stand-by power is 2 w, operation is 40 w, and if the freeze protection kicks on it is 80-90 w. Properly placed/installed there will be no need for freeze protection. Don’t over-buy. What are your loads? You can buy a 120, 150, 180...

One of my best system builds for pool heating was installing poly tubing in the concrete skirting around the pool. It cools the concrete while heating the pool and being close by requires little pumping horsepower to supply the water. As to the domestic, you do not say how much water you are...

You do not list the pitch of your roof or the building orientation. I just finished my 7.5 kw system on an 8/12 pitch and it was, hmmm, difficult as I don't bend to those positions easily any longer. My orientation is 190* and the flush mount Ironridge hardware was excellent. I say that after...

If you go with recirc you have to map out your HW system to make the recirc system function properly. With a large floorpan as you describe, you should consider re-locating the water heater in the best location for minimizing water waste and what always seems like an interminable wait...

Yes, run the line to the kitchen. Do before and after tests an let us know how it goes. Plumbing codes will not allow 3/8", but the codes on pipe sizing have also not followed the flow restricted faucet/showerhead regulations. In the last drought, which actually continues here, my four neighbors...

You are correct on the gas line size issue. Amongst all tankless manufacturers it is the number one problem. Yes, also, you do need 120v, but look at the actual wattage consumed. The Rinnai’s I worked with drew about 40 W when they were at max fire. Standby is only 2W. If the unit needed freeze...

Your local Plumbing and heating and electrical supply houses stock Uni/super strut. I used the Ironridge mounting system and it is excellent.

I've just installed my system. Prior to the test start-up I pulled a hose onto the roof and sprayed the heavy pollen layer off the collectors. They cleaned up well with just the water, but sitting here in the foothills of the Sierra where we will likely not get much, if any, rain until Oct/Nov...

We put 1" pvc in the slab with parallel flow, reverse return from a 1 1/2" header. There was no engineering. It just seems like a good idea and it worked. I did some systems back in the 70's when I was in the business that were "built-in" to the roof as you describe. First you have to make sure...

I have to start this with the disclaimer that I have no business, investment or personal links to this company. I am solely a paying customer...but a happy one. I sourced my material for my 7.5 kw, flush mount, grid tied system from Wholesale Solar out of Shasta, CA. My system is complete, well...

As it happens we are supposed to get a bit of rain over the next few days and I will see how it does on the dust/pollen accumulation. The system is kind of my new baby, so I have to just watch it and not go nuts over it. Once I get everything up and running I'll watch the performance and figure...