Hi,
Quite new to this.
I just had a look at the datasheet and it appears to say that although max PV input is 5500W, its over two strings. 2750W each.
The PV are all connected to PV1. Often generating >3.6kW . For instance today it got to 3.79kW on the App2.0 / FOX cloud graph. During August and a few days in September although not great weather in UK NW, there were many instances of full sun and on that 3.7kW ball park (even 4-ishkW reported on the actual panels on the 5 minutes window on App2.0).
Is this an issue?
Also, it shows flattened, which might suggest some clipping?!
Thanks a lot
H1 G2 3.7 - Maximum PV1 string power
Hi, sorry for delay.
The H1 G2 has served us very well. Not noticed any noise. Even when working at pace.
As it happens its in garage so its not something we'd notice if it did just occasionally.
The H1 G2 has served us very well. Not noticed any noise. Even when working at pace.
As it happens its in garage so its not something we'd notice if it did just occasionally.
H1 G2 3.7 / 1xEP11 / 11x405W (4455W) / South facing.
August 2024 install. UK NW
August 2024 install. UK NW
A reply to my own query no one answered 
Short answer: To avoid clipping, ensure the battery is not at 100% and has room to charge from PV (DC).
TLDR:
In Self Use, the priority order is: House (AC), Battery (DC), Grid (AC)
In Feed-In priority is: House (AC), Grid (AC), Battery (DC)
In the given scenario, I was in Self Use. At some point by mid day, after the little house load required, my battery was fully charged. So the inverter would be sending the rest to grid. However between house and what's left, it was over the 3.68 kw inverter could handle. After than point its either sent to battery no conversion required as its DC-DC. If battery is full then that energy is wasted and classed as clipping.
New strategy to deal with clipping. Now its March and PV generating nicely. The important part is no matter which mode you are on, to have enough available capacity for inverter to dump energy it can't handle..
Usually over winter I've charged the battery from grid at night to 100%, reduced to 90% now. For me in future may need to force discharge in advance of high sun if necessary.
As we approach summer, I will reduce the early battery SoC, likely 50 or 60%, to ensure there is capacity to absorb any charge inverter is left with after house load and grid export.
HTH
Short answer: To avoid clipping, ensure the battery is not at 100% and has room to charge from PV (DC).
TLDR:
In Self Use, the priority order is: House (AC), Battery (DC), Grid (AC)
In Feed-In priority is: House (AC), Grid (AC), Battery (DC)
In the given scenario, I was in Self Use. At some point by mid day, after the little house load required, my battery was fully charged. So the inverter would be sending the rest to grid. However between house and what's left, it was over the 3.68 kw inverter could handle. After than point its either sent to battery no conversion required as its DC-DC. If battery is full then that energy is wasted and classed as clipping.
New strategy to deal with clipping. Now its March and PV generating nicely. The important part is no matter which mode you are on, to have enough available capacity for inverter to dump energy it can't handle..
Usually over winter I've charged the battery from grid at night to 100%, reduced to 90% now. For me in future may need to force discharge in advance of high sun if necessary.
As we approach summer, I will reduce the early battery SoC, likely 50 or 60%, to ensure there is capacity to absorb any charge inverter is left with after house load and grid export.
HTH
H1 G2 3.7 / 1xEP11 / 11x405W (4455W) / South facing.
August 2024 install. UK NW
August 2024 install. UK NW