diy solar

diy solar

EG4 18kPV Q+A general thread

I noticed something cool yesterday, the EG4 18kpv throttled the charging current as the batteries approached full.
But why is this info not always displayed on the web monitoring ? You have to click on the battery.

BMS Limit Charge: 300 A - had changed to 150 A when batteries were around 95%
BMS Limit Discharge: 600 A
BMS Charge: true
BMS Discharge: true
BMS Force Charge: false
 
Quattrohead said:
I noticed something cool yesterday, the EG4 18kpv throttled the charging current as the batteries approached full.
But why is this info not always displayed on the web monitoring ? You have to click on the battery.

BMS Limit Charge: 300 A - had changed to 150 A when batteries were around 95%
BMS Limit Discharge: 600 A
BMS Charge: true
BMS Discharge: true
BMS Force Charge: false
Click to expand...
Just added this and still tweaking sir
 
Gotshocked! said:
I've been running off grid since 11/14. The latest firmware is in my inverter now. I decided to turn the grid back on because I'd like a little more heat in the morning in the master as the fireplace takes a little bit to get up to steam, so I plan to use heat strips on the downstairs hvac for 20-30 minutes on cold (20's) mornings, just until I can land on a damn mini split.

It was a cloudy day all day, but the panels pulled their weight. The inverter kept pulling power from the grid instead of the batteries. Flipping back and forth between the 2. I thought surely, with the latest firmware this issue would be resolved but now I think my inverters got a thing for grid power. Why does my inverter hate me?


View attachment 181875 View attachment 181877
Click to expand...
Your inverter doesn't hate you guy, you just needed Jarrett from SS to commission the thing, because your a technological dumbass.
 
Gotshocked! said:
Your inverter doesn't hate you guy, you just needed Jarrett from SS to commission the thing, because your a technological dumbass.
Click to expand...
Your right, bro, and please don't call me names.
Jarrett is a solid dude. Really nice guy and even sent me a thumb drive, personally, to get the latest firmware going as I couldn't get the goddamn original dongle to work to save my life. He also sent a different dongle and it worked with little effort. Damn near plugged itself in.
I am a happy camper and I'm truly glad that I made the decision to spend my $ with Sig. Solar. Between Kodi answering every little stupid question I had, sometimes twice, and Jarrett making it whole, I feel great about what I've done.
 
Just installing my new EG4 18kpv and need to find out about the breakers I need to buy for my panel.
Where can I look for that?
 
Is it the Main panel or Subpanel? Need more info. I am using a 30 amp, but plan on changing it to a 40amp after I get all the bugs worked out. For safety reasons. But if your panel meets the requirements you can use a 70 amp breaker. Don’t know if that help?
 
Last edited:
BKY2003 said:
Also keep in mind when sizing the subpanel amps, it really need to be less than the main panel breaker. Because when the battery goes to 20%(no output) and no solar, All the subpanel amps (loads) will pass through the main breaker.

Newest manual https://eg4electronics.com/backend/wp-content/uploads/2023/04/EG4-18KPV-12LV-Manual.pdf
Click to expand...
If the LOAD wiring and subpanel bus support it, though, do I really need a subpanel breaker smaller than 200a? I get that it could trip the main 70a breaker if I draw more than 70a, but having a sub panel breaker at 70a would trip too. I guess one is more annoying than the other but it's not a safety thing, no?
 
GregM said:
The breaker in the main panel (where this is to be hooked up) has a main disconnect breaker labeled "200".
Click to expand...
Just wire it like you would an appliance. On the bus. On the opposite end.of the bus as the main 200amp breaker.
 
nuke said:
If the LOAD wiring and subpanel bus support it, though, do I really need a subpanel breaker smaller than 200a? I get that it could trip the main 70a breaker if I draw more than 70a, but having a sub panel breaker at 70a would trip too. I guess one is more annoying than the other but it's not a safety thing, no?
Click to expand...
I have a 125 amp subpanel breaker. I was referring to total load of amps.
 
I wish I could have wired mine this way, But I have a Schneider with a subpanel and a SMA grid tie feeding the grid. So I had to go with the critical load sub panel for the 18Kpv, or at least that’s the only way I could figure to wire it.
 

Attachments

  • IMG_4456.png
    IMG_4456.png
    424.8 KB · Views: 12
GregM said:
The breaker in the main panel (where this is to be hooked up) has a main disconnect breaker labeled "200".
Click to expand...
Please clarify: you have a 200A main breaker on the load center and you are going to have the 18k supply the load center? Are you planning to do this by having the utility power go into the Grid side of the 18k and the Load side of the 18k goes to the 200A main breaker on the load center? Or are you trying to back-feed the load center through a breaker installed in the load center? No utility power, only solar? Or other configuration?
 
Zakharov said:
Please clarify: you have a 200A main breaker on the load center and you are going to have the 18k supply the load center? Are you planning to do this by having the utility power go into the Grid side of the 18k and the Load side of the 18k goes to the 200A main breaker on the load center? Or are you trying to back-feed the load center through a breaker installed in the load center? No utility power, only solar? Or other configuration?
Click to expand...

From the "Grid" on the 18k to a breaker on the load center.
From the "Load" to a breaker on the load center.

At least that is my current thinking unless that thinking is faulty.
If my thinking is correct, then I need to know what size breakers to put in the load center to attach these two items too.
 
The sum of the main service breaker plus 125% of inverter output (50amp) cannot exceed 120% (62.5 amp) bus bar rating. So 225amp bus bar 270amps, 200 amps bus bar 240 amps. 225 amp bus bar 70 amp breaker, 200 amp bus bar 40 amp breaker. someone correct me if I am incorrect.
 
GregM said:
From the "Grid" on the 18k to a breaker on the load center.
From the "Load" to a breaker on the load center.

At least that is my current thinking unless that thinking is faulty.
If my thinking is correct, then I need to know what size breakers to put in the load center to attach these two items too.
Click to expand...
From the "Load" to a breaker on the load center.

Are you referring to the critical load subpanel? If you are talking about coming out of the main panel and go through the 18Kpv back to the main panel you need to change to a different wiring diagram. Look at the feeder tap diagram in the manual.
 
Last edited:
BKY2003 said:
From the "Load" to a breaker on the load center.

Are you referring to the critical load subpanel? If you are talking about coming out of the main panel and go through the 18Kpv back to the main panel you need to change to a different wiring diagram. Look at the feeder tap diagram in the manual.
Click to expand...

Coming out of the main panel to the Grid input of the 18KPV and then back to the main panel from the Load output in the 18kpv to the main panel.
 
You must log in or register to reply here.

Similar threads

M
EG4 PowerPro or Ruixu for 18KPV?
2 3
Replies
43
Views
2K
murmeister
murmeister
B
EG4 18kpv + EG4 powerpro wall mount cargo trailer system
Replies
7
Views
218
MrThisIsME
M
T
EG4 18kPV AC Couple Questions
2 3
Replies
49
Views
3K
wheisenburg
wheisenburg
rhino
EG4 18kPV array output turning on and off
Replies
15
Views
684
#40Fan
#40Fan
SignatureSolarJess
Signature Solar 6000XP + 18Kpv Customer Code
Replies
5
Views
749
timselectric
T
Back
Top