Regular Member
Joined: 30/06/2019
Location: AustraliaPosts: 43
| Posted: 03:40am 01 Jan 2023 |
Hello All
My grid inverter MPPT's have a minimum of 150V, and the home-built one use <100v.
Now I have a 3 x 3.3kwatt solar array, basically 12 panels for each array.
So for my Grid (Mppt's) 2 strings of 6 panels (180V open circuit) and for my home built I have 4 strings of 3 panels (90v open circuit).
So basically what I would like to do is if my battery is not fully charged I can add another solar string to charge the battery and if I don't need the extra string (ie during Summer, feed back into the grid), Come winter I will want all string into the battery's.
What I was wondering is if can I use home-built (mppt) PCB with different components for my Grid (mppts) panels.
I understand I would need to change the Power Mosfets and Diodes to take the large voltage, as well as the Inductor size to make it work.
I have found these items to replace the components.
MBR40250TG
https://docs.rs-online.com/7950/0900766b814b2dca.pdf
IRFB260NPBF
https://4donline.ihs.com/images/VipMasterIC/IC/INFN/INFN-S-A0012490438/INFN-S-A0012837889-1.pdf?hkey=6D3A4C79FDBF58556ACFDE234799DDF0
Thanks
Andy