This guy cherry picked his products to make a review that would generate "clicks" for his you-tube channel.
One thing that matters is durability. A new system that is professionally installed will come with a 20-year warranty. That says a lot. Building electronics that can survive for 20 years on a roof is not easy. You at least need to know what can of plastics to use to withstand the UV radiation. How would you mount a flexible panel? Just lay it on a picnic table? he better panels are in frames and covered in weatherproof glass and will normally our live their 20-year warranty. Even if you got a free panel there is a cost to install it even if you do the work. You will need an inverter suitable to a grid tie setup and there are electrical code rules about how to connect them so they don't back feed the power grid when linemen are working. (Power companies are VERY strict about this.) The electric utility WILL need to inspect this and WILL need to come out and replace your meter. Basically, you are into at least $1,000 to hook up the system, even if it only makes 100W. Realistically the smallest system you'd want is about 10KW. All that said, Tesla will install the entire thing for free. No cost up front. They retain ownership of the system then they sell you power and bill you with a meter, you pay them as if they were a power utility. But Also efficiency matters. Some homes have limited roof space on the south side and you need high watts per square foot. This is the case with me. I only have space for about 10KW Another option. Here in So Calif on the "west side" home prices start at about $1M. So the math works differently from say Rural Oklahoma. A $25,000 electrical system only adds 2.5% to the price of the home and less percent to the more expensive homes. So if you are building a new house that will sell for over $1M (every house here is like that) Tesla's "solar roof" can "work" because you save the cost of a tile roof. https://www.tesla.com/solarroof People are skeptical of these so Tesla offers a lifetime warranty. They claim a "forever" warranty. Not many conventional roofers will offer a "forever" warranty but these are made of tempered glass and you would never need a new roof. On Mon, Mar 11, 2019 at 2:21 AM Gregg Eshelman via Emc-users <emc-users@lists.sourceforge.net> wrote: > > This guy in Australia tested a cheap $90 100 watt panel and one that cost a > lot more. The $90 panel significantly out performed the expensive > panel.https://www.youtube.com/watch?v=3-sc4rlV93g > Commenters noted that the cheap panel is using PV cells of the newest > technology, with all contacts on the back side and a matte finish so there's > zero obstruction to light and the non-glossy surface reflects less light. > The expensive panel has older style cells with buss bars across the front and > a super glossy surface. > > I wonder what $ those cheap panels are in American Dollars, if they're > even available here. Less than $1 per watt is like when hard drive prices > dropped to $1 a megabyte - for a 500 megabyte drive. > > On Sunday, March 10, 2019, 3:38:07 PM MDT, Dave Matthews <n36...@gmail.com> > wrote: > On Sun, Mar 10, 2019 at 5:15 PM Chris Albertson > <albertson.ch...@gmail.com> wrote: > > > You get about 17 megawatt hours ($2800 at my current rate) from one > > $400 panel before the 20 year warranty expires. That is a 30% rate > > of return on the initial investment. Itis no wonder that Telsa is > > offering to place panels on your roof for free, but they retain > > ownership of the panels. They just want your roof. A 30% return on > > investment look good to them. > > > > I wish I could get 17 Mwh / panel over 20 years. Based on my current > production rates I would expect about 6 Mwh per panel. I have a 40 > panel 10.4kw ground mounted array in western NY. It is facing dead > south and is almost zero obstruction. Production was 2016 - 13.2 Mwh, > 2017 12.4 Mwh, 2018 11.7 Mwh. Year to date is 1370 kwh. It all comes > down to location (42.7190° N) and how much snow piles up on the panels > in the winter. Solar is not even close to viable here. I put it in > when it was about 60% subsidized by the state and the feds. That made > is about a 10-11 year payback. Our rate including delivery is > $0.10/kwh. > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
