Blown Inverter

[Brettxxx4]

Maybe i'm off base but what the heck is going on with the blue wire? Is this bringing solar voltage to the inverter?

View attachment 281980

Blue tape on it I believe it’s the ground. I have grounded from the combiner box to the. Ground on the inverter. To grounding rod outside.

 

[Brettxxx4]

Blue tape on it I believe it’s the ground. I have grounded from the combiner box to the. Ground on the inverter. To grounding rod outside.

 

[42OhmsPA]

But didn't he specifically say the inverter blew (and the SCC was ok)?

Good point.

 

[Brettxxx4]

So being not the most patient person I through the one switch or bank of panels to the MPPT and so far so good the new inverter has not blown.

 

[Hedges]

"Solar panel 13.13V" "battery 13.06V" I would call PWM, not MPPT.

The moment a BMS disconnects, PWM will pull voltage up to Voc, which is 4s PV panels, correct?

 

[42OhmsPA]

So being not the most patient person I through the one switch or bank of panels to the MPPT and so far so good the new inverter has not blown.

I highly doubt they are wired 4s if that's what you're seeing with 1 string running.
Are they in the shade?

 

[MisterSandals]

so far so good

Really?

 

[Hedges]

Any "s" is battery voltage, if not MPPT'ing

 

[MisterSandals]

I highly doubt they are wired 4s

This looks like it has to be 4S

 

[Brettxxx4]

I highly doubt they are wired 4s if that's what you're seeing with 1 string running.
Are they in the shade?

Like I knew with this instead of using like acronyms, I need like full names to know what you’re asking me

 

[Brettxxx4]

Like I knew with this instead of using like acronyms, I need like full names to know what you’re asking me

Four panels hooked up together positive to negative. The first end of the panel is the positive the last end of 4th panel is a negative and they both front down to my combiner box.
And if you look at the pictures, it is a very sunny day

 

[Brettxxx4]

Really?

View attachment 281985

The temperature always says that it’s not accurate

In the manual said LIFEPO4 batteries do not trigger the temp sensor.

 

[summit]

"Solar panel 13.13V" "battery 13.06V" I would call PWM, not MPPT.

The moment a BMS disconnects, PWM will pull voltage up to Voc, which is 4s PV panels, correct?

if so, 4s PV is >60vdc, that would smoke the 12v inverter

 

[jorby]

If that is a mppt controller, it has probably shorted the switching devices. That is why the batteries are pulling the pv voltage down to battery voltage. As soon as the batteries are full, the inverter gets over-volted and blows.

 

[Brettxxx4]

Can someone confirm that this is probably way too many panels for me running a bunch of small battery chargers and a fridge

 

[outboard1196]

Can someone confirm that this is probably way too many panels for me running a bunch of small battery chargers and a fridge

Need to know the specs of the charge controller?
Max input voltage / current
Need to know the solar panel specs ( all of them) on the back of panel.

 

[jorby]

Can someone confirm that this is probably way too many panels for me running a bunch of small battery chargers and a fridge

Not a problem unless the charge controller fails shorted.

 

[Fisherguy66]

View attachment 281973
3 of these

Love the panel mounting system They almost look the same as my camp panels Felicity Solar 100w

 

[jorby]

from amazon:

 

[jorby]

4 series is probably too high input voltage?

Edit: Spoiler: no, but 3 parallel to much power

 

[jorby]

Love the panel mounting system They almost look the same as my camp panels Felicity Solar 100w

Hey! That's just temporary!

 

[outboard1196]

from amazon:

View attachment 281990

Looks like they have 800w not sure how much over panel it handles.

 

[outboard1196]

Hey! That's just temporary!

The holes aren't though.

 

[jorby]

So I checked your first post where you said they were 12v panels, so 4 series should have been ok on voltage, but the controller is only rated 650w at 12v and 1300 at 24v. So if it does not self regulate the output power, it will fail if you have a really good solar day.

 

[jorby]

The holes aren't though.

From the screws? I always fill any holes with silicon when making changes.