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diy solar

diy solar

Blown Inverter

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.
 

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"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? :eek:
 
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?
 
Any "s" is battery voltage, if not MPPT'ing
 
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
 
"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? :eek:
if so, 4s PV is >60vdc, that would smoke the 12v inverter
 
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.
 
Can someone confirm that this is probably way too many panels for me running a bunch of small battery chargers and a fridge
 
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.
 
4 series is probably too high input voltage?

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

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