clayswen
New Member
Is there a good rule of thumb on overpaneling? Maybe by 10% or 20%? I won't have a battery right now and I'll be grid tied and net metering. What does the inverter do with anything over the max wattage per mppt?
The SCC pulls the current it can use, up to the max that the array can supply.What does the inverter do with anything over the max wattage per mppt?
That makes sense. I will leave it at 9.2kw array since it is 9kw max output. I do have another grid tie inverter that I can AC couple when I do the other array.Overpaneling makes less sense when you're exporting, because the lost production is lost export credits.
Wow. Sounds impressive though.The most that I have overpaneled is 400%.
It was a bit wasteful. lol
I hit peak production soon after sunrise. And kept it at peak until sunset.Wow. Sounds impressive though.
The most that I have overpaneled is 400%.
It was a bit wasteful. lol
Didn't phase it at all. lolHehe I bet you were having a good time when it rained for 2 weeks straight!
Solar panels have gotten so cheap that you can overpanel as much as you have physical space for it. I've only used about 1/10 of my backyard so far with my 6kw array. So I could actually go as much as a 60kw arrayDidn't phase it at all. lol
Thats the thing though, if your trying to capture more on poor days, how does over paneling really help? Trying to wrap my head around it.For off grid and zero export systems, overpaneling makes a lot of sense, cause at a certain point you're just trying to drag up poor days production good days are going to waste either way.
I know this. The more I read the more I look in the mirror and look like Forrest Gump….”I am not a smart man Jenny”Thats the thing though, if your trying to capture more on poor days, how does over paneling really help? Trying to wrap my head around it.
Example;
If we have 1200w of panel and 1000w of SCC we are over paneled but the SCC will see more time at max power and be better utilized.
If we have 1200w of panel and 1500w of SCC capacity, we are not getting the most use of the SCC but we will never loose the extra 200w of solar panel capacity.
In low light, as long as your string is setup correctly, how does over paneling help the panels capture more in low light? Is this an issue with large MPPT and voltage range? Is this an SCC capability issue?
My strings start pulling in at about 1-2w and climb from there. I have both over and under paneled. Doesn't seem to make much difference on the lower end.
What am I missing here?
In low light conditions, panels may only produce 50% of the rated output. Twice as many panels will double the production in low light conditions.Thats the thing though, if your trying to capture more on poor days, how does over paneling really help? Trying to wrap my head around it.
ExactlyExample;
If we have 1200w of panel and 1000w of SCC we are over paneled but the SCC will see more time at max power and be better utilized.
So if I double my number of panels but I am not maxing out my SCC, I get the best of both worlds? Max at low light and max at high light?In low light conditions, panels may only produce 50% of the rated output. Twice as many panels will double the production in low light conditions.
Exactly
Nothing wrong with doing so.So if I understand it correctly, we really just need to add more SCC? SCCs are cheap enough, why not?
That's not overpaneling.So if I double my number of panels but I am not maxing out my SCC,
Better option, if you can.we really just need to add more SCC?
Using SCCs implies having batteries and batteries have max charging rates. So that is one "why not?"; there is a limit to just adding more.So if I understand it correctly, we really just need to add more SCC? SCCs are cheap enough, why not?