My understanding is that the shadow of even one leaf will shut down a panel. I guess there are some situations where one panel is 100% clear and the other partially shaded, but seems rare. I'd say that over the past couple decades, my situation has been >95% eitherI have to say, more often than not, unless you are completely out in the open, there is partial shade. We go to forests often and there are trees all over and the shadows hit the panels differently all day. Even if you park in a clearing, you only have a few hours of full sun when the sun is directly overhead. Otherwise trees shade some of the panels. The vehicle also has a tall Air Conditioner on top and it shades some of the panels at various times of the day. I guess it depends where you go. Even if only one corner of a panel is shaded, it basically produces nothing.
Wow- how many watts per each of those panels? What are they?
Am I the only one confused here? How can a 100 watt panel output 1000 watts? Is there a datasheet showing that tolerance?Total of six Renogy Eclipse 100 watt panels with a tolerance of -5/+1000 watts. And this was a cloudy day at 9 AM.
I'm just as confused. No math that I know of allows that picture to be true...Am I the only one confused here? How can a 100 watt panel output 1000 watts? Is there a datasheet showing that tolerance?
I'm just as confused. No math that I know of allows that picture to be true...
Also, that's not a screenshot, it looks like a picture of a phone off of a website. What's going on here?
That is a very reasonable result. Keep in mind that the panel "official rating" is based on solar conditions in the high desert during the winter.John..........campground closed........Coronavirus.........so ran the gen set 1 hour and then drove 70 miles or so. SOC constantly rising. When it got to 100% the controller went to 0 output. So it’s "trying" to do the right thing. ??? Never reset, stays in float.
Anyway, the 100/30 smart Victron will be here tomorrow........good old amazon.........I now understand the 2 controller set up, but already wired for one controller.......(within my pay scale to R n R the controller)......no way for me to get on roof and butcher the installers wiring. Maybe a future project???
As far as panel output in general............watching my readout pretty much daily for 3 years or so, highest I ever saw was 83 watts, with a 100 watt panel. Midday summer Florida.
Is this true? Seems incredibly high for what is effectively an intelligent buck converter. Kisae advertises > 98% MPPT tracking for the DMT-1230/DMT-1250 series; this site says most modern MPPTs are around 93-97% (in the context of home systems). FWIW the Kisae DMT is also a buck/boost, so it can take 10.5v on the input and boost it.. this also lets it take ~12.0 on the input from the alternator and boost it to 14v+ to charge LiFePO4. Super happy with my Kisae DMT-1250 if it's not clear already.makes up for the say 15% or so lost conversion efficiency compared to more modern MPPT models.
My understanding is that MPPT is effectively a PWM (high frequency switch) with an inductor to store the change that a straight PWM controller effectively wastes when it's pulsed off. I can certainly imagine that a high quality PWM could, in some conditions, exceed a low quality MPPT design, but it seems like the general view is that MPPT is a newer, more refined and superior technology. Really curious what you think makes straight PWM superior?No, never superior as a general technology.
But a wonderful overall design functionality implementation will beat a crappy one, independent of that factor.
Bogart happens to make great stuff that overrides the lower efficiency.
The original founder Ralph Hiesey moved on years ago, and the new lot stopped innovating.
You inferred the opposite of what I meant.Really curious what you think makes straight PWM superior?