Step One : make sure your inverter can link to the cyber , and you know about the OSS plantform， and should know the real reason
the website is : https://server.growatt.com/login?lang=en enter your shinephone's account and password is OK
WHY the warning appeared ? the essential reason is because inverter system detect the connected grid voltage( L1-L2, L1-L3, L2-L3) ************ exceeds ********************************** its internal 9 values : they are item 52,53, 56,57, 60,61, 64,65 and 80. in another words, THREE grid voltages exceeds NINE limits
Step Two : measure the realtime voltage of the tapping point (grid connection point) , Six voltage , here is the template (N for Neutral , G for ground ）: (the grid with N will supplement when i encounter this grid topology )
SN: QGEQCLG005 Issue : AC V outrage without Neutral L1-L2 =388V L1-L3 =382V L2-L3 =389V L1-G =220V L2-G =225V L3-G =221V SO THE MAX voltage is about 390V, THE MIN voltage is about 380V (voltage L1-L2, L1-L3, L2-L3 ) the grid working voltage is about 380V-390V We Can imagine the scope of limit should be about 350V~430V (just for nine limit setting)
2.2 now we begin to read the limit item 52,53, 56,57, 60,61, 64,65 and 80. in the inverter, and i will tell you why the warning code 300 appears:
↑ WE CAN SEE THE item 52-53 a pair is ( considering the 4222/10=422， 4050/10=405，） dont completely include the grid voltage ( 380V-390v)--so 300 appears. item 55-56 is a pair (287.8V-405V ) , compared to the grid(380V-390v) , meets the condition. item 59-60 is a pair(215.9V-405V) , compared to the grid(380V-390v) ,meets. item 63-64 is a pair (387V-405V ) , compared to the grid(380V-390v) ,meets. item 80 , we assumes it meets. *** note: on the 9 items, if any item do not include the grid exceeds , there will be warning AC 300, this is why it is so often.
Step Three : change the 9 item to make sure it includes the grid voltage range.
3.1 the grid voltage is about 380V -390V , We can set the nine item to include the scope ,for example : 350V-430V , so the item would be 52-53 : 3500-4300 56-57 : 3500-4300 60-61 : 3500-4300 63-64 : 3500-4300 item 80: 4250 ,pls see the follows : ↓↓↓ then it will include the grid fluctuation (3800-3900) in .
3.2 read batch of 52-67 ( password is growatt+date) -select the [advanced set] you can also read 80-82 in batch 232-234 in batch ( item 232 adapts to your grid has no Neotrul line , you should make it into 1 ) [by the way, 54,55 they are the Frequency limit ]
3.3 write one by one ↓↓↓ 52,53, 56,57, 60,61, 64,65 and 80.
3.4 read again to make sure you really changed the value , here is mine ↓ （similar to item 80 )
↑↑↑ after you change the 9 items , you will see the inverter will change its state from abmormal/malfunction into wait , and will normal the AC V outrange(code 300) disappears . in a word , 3 VOLTAGES adapts 9 items , you can also change the 9 items by shinebus or shinetools(i will intro later)
Summary： (1) the 3 grid value should stay in the 9 items , these are the basics , there is still some details sorry i cant totally tell for it is a little dizzling and difficult ...) (2) sometimes the grid is in fluctuation , inverter will turn into normal automatically when the gird voltage returns the normal level . so this is a proper phenomenon ,just relax , dont be nervous , you can even ignore it. (3) dont adjust the 9 item value into too high or too low , or the inverter will **EXPLODE** , just consider the factor 1.1, or 1.2 , for example : 350V *1.2= 420v, then 4200 will be OK for the upper limit.