Parallel Setup SPF 3000TL 24V - Solar drops out

[SeekerII]

Hi,

I purchased two Growatt SPF 3000 24v inverters maybe year and a half ago, and they have been working great I had them setup working seperate from each other.. I finally got around to rewiring, and set them up in parallel, followed the manual thru installation and commissioning. They were working until the second day when I had no solar input. Shut down the units, and restarted and they found the solar input. Worked for a day, and then today the sun came up and the solar was not on line. Shut down and restart and they found the solar input.

Please advise where I should look, I followed the setup as indicated in the manual, they come up as master and slave, I verified all the settings are identical. Here are my settings:

1 - SBU
2 - 65
3 - UPS
4 - Disabled
5 - USE
6 - Enabled
7 - Enabled
8 - 120
9 - 60
10 - 2
11 - 20
12 - 23
13 - 27
14 - CSO
15 - OFF
16 - OFF
17 - OFF
18 - Enabled
19 - 27.4
20 - 27.4
21 - 22
22 - Disabled

UPDATE: Today, again no solar input, but the view screen showed the little solar panel, but it was not charging. So this time i cycled the "Master" unit off then back on (not removing the solar input or battery), and the units's started charging from the solar.

Sunny Florida

 

[MisterSandals]

I verified all the settings are identical

I'd start by posting your settings here with hopes someone spots something.

Pics of wiring usually results in someone finding an opportunity for improvement too.

 

[SeekerII]

Hi,


Sunny Florida

Wow, three weeks FOUR MONTHS! and not a comment, no one else has two of this units in parallel??