ArthurEld
Solar Wizard
I was asking questions in the Enphase thread and Ampster recommended that I start a new one.
I am about to install a new grid tied hybrid system and I want to use some Enphase Iq7 micro inverters because I have shade and different angles.
Since I knew that batteries are DC I was hesitant to use micro inverters on all the panels. I remember hearing somewhere that it is more efficient to charge the batteries with DC as much as you can within reason. I would enjoy hearing what others have to say about this subject. There are obviously smarter people than me around here. The attached picture was in the email.
This is part of the email conversation I had with Sol-Ark tech support-
Thank you for the information Yang.
I actually want to use micro inverters. The manual shows different ratios of AC to DC described as "Best", "Good", "OK" and "Poor"
Since I am designing my system from the start, I want to set mine up "Best" not "Poor"
Please tell me if the way I placed the panels and micro inverters are going to work well. I can add more micro inverters or take some away. I just want to be sure to do it in the best possible way so the system will work efficiently.
Here's a picture of my roof.
The two strings of 9 panels are facing West. Also the one string of 4 panels with micro inverters is facing the same West direction. There is a string of 8 panels on the East side of the roof. And there is one string of 4 panels with micro inverters facing South. I'm sure there are other possibilities. There are some shadows from 2 palm trees starting to show on the 15' x 43' flat roof. They will move over about half of the panels in the afternoon.
Thank you,
And here's the answer-
Thank you so much for the additional information.
Yes, your plan will definitely works well.
Since you are grid tied, you don't need to worry about derating of AC coupled and batteries.
Generalized application
MPPT1: 2*9*330=5940w
MPPT2: 1*8*330= 2640w
AC:. 2640w
Total: 11220W
Above is my recommendation for your layout
Feel free to contact me yang@sol-ark.com
Or support@sol-ark.com
Best regards,
Yang Chen
Sol-ark engineer support
I'm persistent so I asked this too-
Thanks so much for confirming my setup.
Can you please tell me the maximum # of micro inverters I can AC couple while staying in the "Best" efficiency? I plan to use 50kwh of batteries. And I will use 34 330W solar panels.
reply-
I want to specify even though you can put up to 7.6 AC coupled stuff on Gen input, but there is a max number of Power that can be feed into a 12K.
In your case, 3kW is the max number you can put on the AC coupled side.
And we our Voltage-based on our battery input. As long as your battery is 48V nominal, our system will work with them
We do have some battery partners (Communication to the 12K)
Blue Ion, Discover, Pylontech, Dyness, and fortress eflex (In progress) are some of the common ones that we communicate directly with (no battery setup needed on our system)
I am about to install a new grid tied hybrid system and I want to use some Enphase Iq7 micro inverters because I have shade and different angles.
Since I knew that batteries are DC I was hesitant to use micro inverters on all the panels. I remember hearing somewhere that it is more efficient to charge the batteries with DC as much as you can within reason. I would enjoy hearing what others have to say about this subject. There are obviously smarter people than me around here. The attached picture was in the email.
This is part of the email conversation I had with Sol-Ark tech support-
Thank you for the information Yang.
I actually want to use micro inverters. The manual shows different ratios of AC to DC described as "Best", "Good", "OK" and "Poor"
Since I am designing my system from the start, I want to set mine up "Best" not "Poor"
Please tell me if the way I placed the panels and micro inverters are going to work well. I can add more micro inverters or take some away. I just want to be sure to do it in the best possible way so the system will work efficiently.
Here's a picture of my roof.
The two strings of 9 panels are facing West. Also the one string of 4 panels with micro inverters is facing the same West direction. There is a string of 8 panels on the East side of the roof. And there is one string of 4 panels with micro inverters facing South. I'm sure there are other possibilities. There are some shadows from 2 palm trees starting to show on the 15' x 43' flat roof. They will move over about half of the panels in the afternoon.
Thank you,
And here's the answer-
Thank you so much for the additional information.
Yes, your plan will definitely works well.
Since you are grid tied, you don't need to worry about derating of AC coupled and batteries.
Generalized application
MPPT1: 2*9*330=5940w
MPPT2: 1*8*330= 2640w
AC:. 2640w
Total: 11220W
Above is my recommendation for your layout
Feel free to contact me yang@sol-ark.com
Or support@sol-ark.com
Best regards,
Yang Chen
Sol-ark engineer support
I'm persistent so I asked this too-
Thanks so much for confirming my setup.
Can you please tell me the maximum # of micro inverters I can AC couple while staying in the "Best" efficiency? I plan to use 50kwh of batteries. And I will use 34 330W solar panels.
reply-
I want to specify even though you can put up to 7.6 AC coupled stuff on Gen input, but there is a max number of Power that can be feed into a 12K.
In your case, 3kW is the max number you can put on the AC coupled side.
And we our Voltage-based on our battery input. As long as your battery is 48V nominal, our system will work with them
We do have some battery partners (Communication to the 12K)
Blue Ion, Discover, Pylontech, Dyness, and fortress eflex (In progress) are some of the common ones that we communicate directly with (no battery setup needed on our system)