ahreno
New Member
I'm a bit confused by the numbers and how they stack together.
originally i was getting two powerwall 2 but its been changed and i'm getting a powerwall plus and a powerwall 2 for free and am looking to add on some panels. the powerwall plus has its own inverter.
i'm not too worried about blackouts, the grid is quite stable recently. i'd like to just get my pge bill down or erased.
I bought 26 Longi Hi-Mo-5 panels. 411w with up to another 140w bifacial gain. I can get more at $135 each
![1714709546508.png 1714709546508.png](https://diysolarforum.com/data/attachments/213/213016-84c83ad89e3815c64ea94088aef9d17e.jpg)
the inverter on the powerwall plus is:
![1714709492222.png 1714709492222.png](https://diysolarforum.com/data/attachments/213/213015-ce3d43faefa9dfd02039059907d5dfe1.jpg)
am i looking at the "maximum input voltage" of 600 / 48 = 12.5 panels per mppt?
or
operating input range 550 / 48 = 11.45 panels per mppt
or PV mppt voltage range of 480 / 48 = 10 panels per mppt?
i feel like i should max out 3 mppts. probably do a run facing west or at least south west and two facing south. how many more panels do i need to buy?
originally i was getting two powerwall 2 but its been changed and i'm getting a powerwall plus and a powerwall 2 for free and am looking to add on some panels. the powerwall plus has its own inverter.
i'm not too worried about blackouts, the grid is quite stable recently. i'd like to just get my pge bill down or erased.
I bought 26 Longi Hi-Mo-5 panels. 411w with up to another 140w bifacial gain. I can get more at $135 each
![1714709546508.png 1714709546508.png](https://diysolarforum.com/data/attachments/213/213016-84c83ad89e3815c64ea94088aef9d17e.jpg)
the inverter on the powerwall plus is:
![1714709492222.png 1714709492222.png](https://diysolarforum.com/data/attachments/213/213015-ce3d43faefa9dfd02039059907d5dfe1.jpg)
am i looking at the "maximum input voltage" of 600 / 48 = 12.5 panels per mppt?
or
operating input range 550 / 48 = 11.45 panels per mppt
or PV mppt voltage range of 480 / 48 = 10 panels per mppt?
i feel like i should max out 3 mppts. probably do a run facing west or at least south west and two facing south. how many more panels do i need to buy?