@ I think it can cause a mismatch in the current produced by the panels. Some panels can act as a resistance, causing them to heat up. I’m not specialist…
@@jascfdrac I see what you're saying. Yes they will make different power due to the different angles but they're still close enough that it hasn't caused a huge impact.
Generally you want all the panels in a DC string pointing the same direction. Hot spots won't be an issue with that much ventilation but what will happen is that the panel with the lowest current capability (due to sun angle) will reduce the current on the remaining panels. At some point the panel with the lowest current capability will go into bypass, but it takes quite an effort to actually go into bypass without shading. So production may be limited in that arrangement. I personally would rewire it so the panels on the shed are the only panels on that string and the panels on the Pergola are the only panels on that string... assuming the panels on the Pergola don't exceed the voltage limits of the charge controller. (Sum of all VOCs + 25% must be under the absolute maximum voltage of the charge controller, sum of all VMPs should be within the MPPT voltage range). Another alternative may be to split the Pergola into two strings (so you have three total strings). Lets see. 5 panels on the Pergola x 40V (?) = 200V. Typically the MPPT needs 120VDC to start. Check to see if that will work. Most 240VAC systems only need 120VDC on the MPPT input to start due to being split-phase. Well, it will depend on the battery voltage obviously, not the AC output. -Matt
This is the setup I can appreciate. And they did a great job of making the panels fit in with their home 🏡
Very impressive, thanks
I couldn't help noticing. What a spaghetti full of mess! 😮
Who did your home wiring 😮
that was the customer's home, I'm sure the house was built 30+ years ago.
@minutemanprep
The work that was done yesterday, 30 years ago, or 100 years ago. That's no excuse.🫨😉
Not small at all
I’m concerned with the array with 2 different orientation. Besides loss of power, you could have hot spots on some panels.
Interesting, why would there be hot spots? The orientation thing I understand but that's what needed to be done to make it work the best.
@ I think it can cause a mismatch in the current produced by the panels. Some panels can act as a resistance, causing them to heat up. I’m not specialist…
@@jascfdrac I see what you're saying. Yes they will make different power due to the different angles but they're still close enough that it hasn't caused a huge impact.
@ I hope you don’t have problem.
Generally you want all the panels in a DC string pointing the same direction. Hot spots won't be an issue with that much ventilation but what will happen is that the panel with the lowest current capability (due to sun angle) will reduce the current on the remaining panels. At some point the panel with the lowest current capability will go into bypass, but it takes quite an effort to actually go into bypass without shading.
So production may be limited in that arrangement. I personally would rewire it so the panels on the shed are the only panels on that string and the panels on the Pergola are the only panels on that string... assuming the panels on the Pergola don't exceed the voltage limits of the charge controller. (Sum of all VOCs + 25% must be under the absolute maximum voltage of the charge controller, sum of all VMPs should be within the MPPT voltage range).
Another alternative may be to split the Pergola into two strings (so you have three total strings). Lets see. 5 panels on the Pergola x 40V (?) = 200V. Typically the MPPT needs 120VDC to start. Check to see if that will work. Most 240VAC systems only need 120VDC on the MPPT input to start due to being split-phase. Well, it will depend on the battery voltage obviously, not the AC output.
-Matt