Agreed; If you're not space constrained and want the most cost-effective system I certainly would not pay >$0.40/w for panels.
~All panels and cells are manufactured to roughly the same standard. I've never seen a significant difference in quality. I would never hesitate to buy panels from a company with a large scale manufacturing plant.
bewildered by panel choices for DIY system
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I do not know if they sell to DIYer, they may only sell to installers and quote based on quantity, but it does not hurt to askLeave a comment:
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S.P. still can have a higher power density at their top end panel (221 W/m^2), but for the same STC array size, the older, still avail. and still viable workhorse S.P. 327's at 200.1/m^2 will require more roof real estate than the REC 355's at 204 W/m^2 by just a bit. And they are not avail. for DIY.
The REC is a bit bigger, 1.74 m^2 vs. 1.63 m^2 for the S.P., but a bit lighter, at 19.5 kg, vs, 20.6 kg. for the S.P.
Still, the ~ 7% greater surface area for the REC panel is indeed an assembly consideration, especially on a windy day.Leave a comment:
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Solar Electric Supply
https://www.solarelectricsupply.com/...ce-solar-panel
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355w is still going to take up some real-estate, be heavy and act like a sail.
43 lbs, 68" x 40" , 20.3% eff
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Solar Electric Supply
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I just found out that the new REC alpha will be available in 355W panels in a couple of weeks for $0.75/W ($266 for 355 watts) which is quite nice for a panel of that quality
-0.26 temp coef
Cut Cell panel (6 strings of 20 cells)
92% production warranty at 25 years
20 years product warranty
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-0.26 temp coef
Cut Cell panel (6 strings of 20 cells)
92% production warranty at 25 years
20 years product warranty
No dates and price yet on the 380Watt version
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Yeah, I saw those. Doing ground-mount, I'm not so space-constrained. Nor do I have a rigid idea of how many watts I need.
I've made a spreadsheet to compare a variety of specific panels, configuration (number of panels and landscape/portrait), etc. I assume a $50 optimizer on every panel (Tigo TS4-R-O)Last edited by nwdiver; 11-07-2019, 05:44 PM.Leave a comment:
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