I dont get anywhere near the 27KW rating since i have east/south/west facing... right now with bad sun angles i get 12-14kw during peak...but this design allows an even production throughout day.
EG4 18KPV in full beast mode 24,000 watt test (2 inverters)
- Thread starter neo2299
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That fireplace is the only thing heating the house If electricity isn’t available. It’ll save me in an emergency.
The sticker on the box.
Zwy
Emperor Of Solar
Rule of 3,2,10 applies to any stack for biomass. If wind comes from opposite side of house, the stack may not draw correctly due to ridgeline and may actually suffer a downdraft.Lower the stack!!
Hedges
I See Electromagnetic Fields!
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Lower the stack!!
Thinking outside the box ...
We have a sign, "open damper before lighting."
How about, "Raise chimney before lighting"?
(would have been preferable to design and implement up front, or locate fireplace elsewhere. Too much work to retrofit.)
That chimney will make hard shadows when other panels in the string are getting full sun. If bypass diodes can't handle full current, they overheat and melt/break parts of the panel. Some manufacturers warn their panels can't handle it. Maybe some can.
Do you have any module level power electronics which might have their own current bypass mechanism? (I don't know if RSD or optimizer can actually handle that either.)
I have the panels that are hit by the shadow on their own string... the top row and left side are on their own string... this helps isolate the shadow panels... In the summer time this shadow is pretty much gone
Hedges
I See Electromagnetic Fields!
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That should help a lot, especially if that string is in parallel with unshaded strings - they keep voltage high, and current pushed through shaded panel(s) is low. If on own MPPT, they will carry Imp so long as enough unshaded panels to remain within MPPT operating range.
We've seen photos of melted junction boxes and cracked glass.
One company pitching optimizers said panels used cheap diodes that couldn't handle the current (but they can build an optimizer cheaper than an external bypass diode?) Probably designers (I won't call them engineers) selected a diode based on data sheet that said it handled a certain number of amps. Without looking at junction temperature rise, ambient temperature, heatsinking.
We've seen photos of melted junction boxes and cracked glass.
One company pitching optimizers said panels used cheap diodes that couldn't handle the current (but they can build an optimizer cheaper than an external bypass diode?) Probably designers (I won't call them engineers) selected a diode based on data sheet that said it handled a certain number of amps. Without looking at junction temperature rise, ambient temperature, heatsinking.
awesome...can you provide here?
Yea, this is why my panels aren't on the roof. Have to have the wood stove for those cold Missouri days. This might be a good usage case for some optimizers??? Either that or break those strings down to about 2-4 panels on separate SCCs but that doesn't help with your 18K AIO. I bet you could get allot more power out of that side of the roof. That or put them down on some ground mounts. That chimney is murder on your output.
All these are great points that i considered in length prior to install. Currently we have full sun and the panels with the shadow are averaging 270w per panel (8 panel). The string of 13 next to it is avg 330w. While it does hurt the output overall i considered this and added 4 additional panels to my original plans. I'm willing to take the hit during the winter as summer months have basically minor shadow issues. I do not have any ground mount options on my land due to trees and sloping yard. I also did the math on optimizers and the money / reward didnt seem worth it.
Well, get to mounting, slacker ?
Oh one more note - the west facing slope with no panels is a 10/12 pitch, 2+ story high and has a pipe jack dead center... I did consider panels but it would have been extremally difficult to get anymore than 6 installed.
Samsonite801
Solar Wizard
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Lower the stack!!
Switch to mini-splits...
Samsonite801
Solar Wizard
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A pellet stove might be another option (except they do use a small amount of electricity to run the fan and auger), but they burn super clean and don't put out any smoke. My parents have one and it just has like a foot long pipe that comes out of the basement wall with a rain shroud on the end, doesn't make any soot or anything. Kind of just looks like a dryer vent that sticks out a bit further than the siding.
Samsonite801
Solar Wizard
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Yes, similar to a small server or gaming GPUs x2. Everyone in my family has asked "whats that sound" when i have the storage room door opens. The fans stay silent as long as its under 6kw per inverter.
