diy solar

diy solar

Why my system will not run my fridge?

Sillyputty said:
Are you charging the battery with just with a solar charge controller or are you using a stand-alone battery charger at first to get it topped off (around 14.6V)?
Click to expand...
I was going to just connect itTo my midnight solar classic 150 charge controller
 
Sillyputty said:
This is a confusing thread and I may have missed something, but:
  • Did you fully charge your battery? What resting voltage (disconnected for an hour or so) was it when it was done charging?
  • What I've read says that you're using the battery at 12.9V which is only about 30% charge.
  • With the startup-surge of your refrigerator, combined with the low voltage disconnect of your inverter (12.7V), and the low battery voltage at the start (12.9V) it seems like it's the not fully charged battery that's the main problem.
  • The 8' cables from the battery to the inverter may be adding to this issue, by creating even more voltage drop.
Click to expand...
He's using LFP batteries? 12.9 isnt that low of a voltage for LFP. neither is 12.7 (that's 3.2 and 3.1 per cell respectively). If im not mistaken and he's using LFP, i suggest setting that low volt disconnect lower. Try 11.5. 10.5 is the recommended rock bottom discharge (2.5v per cell). 11.5 is conservatively over that.
 
When you connect the fridge to the inverter .... how long does it run before it gives the error?
 
DerpsyDoodler said:
He's using LFP batteries? 12.9 isnt that low of a voltage for LFP. neither is 12.7 (that's 3.2 and 3.1 per cell respectively). If im not mistaken and he's using LFP, i suggest setting that low volt disconnect lower. Try 11.5. 10.5 is the recommended rock bottom discharge (2.5v per cell). 11.5 is conservatively over that.
Click to expand...
Once I get it connected to the charge controller I’ll let you know so maybe you can help me set up the settings.
 
559sanchez93705 said:
Once I get it connected to the charge controller I’ll let you know so maybe you can help me set up the settings.
Click to expand...
just lower the inverter's low volt disconnect. see if that lets it start up your fridge. or did i not read enough? did yall already solve the problem?
 
Well .... We've all been on completely the wrong track. I think @circus is correct.

We've all been assuming that the inverter was shutting down immediately when the fridge tried to fire up .... and assuming always get you into trouble.

Here is a snippet from the Xantrex Prowatt 2000 manual.

1628208138686.png

We should have looked this up last night but we all followed @smoothJoey to the bar .... LOL

Most likely thing now seems to be that the inverter has a bad fan.

I have attached a copy of the manual for the OP to download for future reference.
 

Attachments

  • 1060-xantrex-prowatt-sw-2000-manual.pdf
    1.7 MB · Views: 2
Bob B said:
Well .... We've all been on completely the wrong track. I think @circus is correct.

We've all been assuming that the inverter was shutting down immediately when the fridge tried to fire up .... and assuming always get you into trouble.

Here is a snippet from the Xantrex Prowatt 2000 manual.

View attachment 59006

We should have looked this up last night but we all followed @smoothJoey to the bar .... LOL

Most likely thing now seems to be that the inverter has a bad fan.

I have attached a copy of the manual for the OP to download for future reference.
Click to expand...
Thanks for the menu I’ll look up to see how I can lower the voltage on that inverter.
 
559sanchez93705 said:
Thanks for the menu I’ll look up to see how I can lower the voltage on that inverter.
Click to expand...
I don't understand what you are trying to say with lowering the voltage .... you need to take the inverter apart and blow out the dust and see if you can get the fan running.
 
559sanchez93705 said:
Maybe I can put a fan in front of the inverter on high to keep it cool to see if it runs it
Click to expand...

That would be a good test, but it needs to have air pulled thru it with it's own fan.

You may have to take it somewhere to see if it can be repaired..... I advised to take it apart and try to fix or replace the fan ... but if you aren't comfortable with your ability to do that, then I wouldn't advise it.
 
Bob B said:
I don't understand what you are trying to say with lowering the voltage .... you need to take the inverter apart and blow out the dust and see if you can get the fan running.
Click to expand...
Ok I’ll do that when I get back home it will probably be around 7:30pm
 
Bob B said:
I don't understand what you are trying to say with lowering the voltage .... you need to take the inverter apart and blow out the dust and see if you can get the fan running.
Click to expand...
i mentioned low voltage disconnect was too high. but im not confident about anything i read up there or what was said. so scratch my tidbit and just move forward with Bob. He'll get you there.
 
Bob B said:
Going by the error code, it may not be coming on at all .... The fan should definitely be coming on before you get an over temperature alarm.
Click to expand...
Yea I thick ur right I’ll try putting a fan in front of it on high speed to if that make a deference.
 
Bob B said:
Going by the error code, it may not be coming on at all .... The fan should definitely be coming on before you get an over temperature alarm.
Click to expand...
Just seems that two minutes is way too quick to be in an overheat situation unless the draw was hard for it to cope with.
 
You must log in or register to reply here.

Similar threads

O
Will this work?
Replies
18
Views
525
Johneb
J
P
Can my system support Lithium Batteries?
Replies
13
Views
564
NVS
NVS
K
Xantrex Solar Charging System
Replies
4
Views
233
KronicPain
K
K
Low voltage when at 40% SOC. Why?
Replies
10
Views
358
Brucey
Brucey
H
Best set up for my RV solar project
2
Replies
32
Views
1K
hazed
H
Back
Top