Repairing a MPP Solar LV6048 6kw split phase inverter
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- Опубліковано 6 вер 2024
- You could have more fun watching paint dry! Unless you don't have power - inverter failure , then you may wish you did watch this video :)
Fault 81 and 88 at 39 min mark
Ian, at 16:15 you comment "I never saw any reason to remove the dynamic ground bond screws" - I don't understand how this twin-inverter-in-a-box can have two N-G bonds, without violating the code (which requires a single N-G bond). Now imagine an installation with two or three of these MPP6048 units, now you have 4-6 N-G bonds. There could be energy flowing between the inverters on Ground.
For an RV or something like it, competely off-grid perhaps your comment makes sense.
For grid pass-through set up, I removed the screws, and ensured N-G bond is elsewhere(at the main panel), and only a single point using common neutral, no loops. Runs perfectly and no energy flows on G anywhere in the system. This may be even more important if you tie in a Reliance CLP to the system.
Enjoyed the video, thanks for taking the time to make this and post.
This type of self-destruction should be designed out of the inverters before going being put for sale!
This video really captures the annoyance of the damn beep. Need a switch on it so it can yell at you only when your not messing with it.
Change parameter to no beep on fault
After having this problem, would you recommend this unit ? If not , what alternative ? Thanks for some very good videos !
So what part actually goes bad with this fault? Is this something that you can desolder and replace it with a new part? And also in my personal experience you can absolutely get shocked by 48 volt or 52.3 in my case. Normally this does not happen but it is possible. Felt different than a shock from a 120VAC
Do you have anything like this video for the LV6548? I have not found anything on them. Mine died.
Great video. Thanks for your time.
Do you have a part number for that main control board? (The one that lies on the side, perpendicular to the main inverter board). I'm hearing that the LV5048 can be upgraded to LV6048 simply by installing a 6048 control board...
I'm not sure if it's common for BMS's to have a fault/cut signal output that could be used to open a contactor, but it seems a contactor on the AC output might be the best way to protect the inverter. At first I thought it could be a glitch in the MCU/MPU controlling the H bridge, causing a shoot through condition or something, but given that there is likely DC boosting occurring from Batt DC bus into the HV DC bus of the inverter H bridges, a decreasing Batt voltage would cause boosting to increase and/or Inverter H bridge duty cycle to increase, causing either popped FETs/IGBTs in the boost converter circuit or the inverter H bridge. It might be worth exploring installing a small UPS/battery/supercap on the first regulated/bucked DC bus after the Batt DC bus (for control power) to see if prolonged control power during cut-off would protect it...
If not, then a contactor that unloads the AC output, controlled by a BMS fault output could potentially protect the unit.
I have yet to install mine and test them. Of course I'd like to protect them and be able to repair them if needed. So thanks for your videos.
From Kenya, hello admin
Hi
I have a 4 years old MPP SOLAR LV5048. I just made a terrible mistake. I connected my new batteries without using a bleeding resistor, to precharge the inverter capacitors. Lots of sparks and a totaly dead inverter.
Can you give some guidance on wich components might have been damaged?? I know some expertise reparing electronics, but without a diagram, I'm totaly lost.
Any help is appreciated!!
How often is a loose connection inside the primary reason for failure?
Hello Ian, can you guide me on error f88 when I set split phase number 28, 2a2!
So if utility power is also used as a backup to battery power (output = SBU), then this F09 issue should technically, never be an issue, right?
Great video. Hopefully my 6048 doesn't have this issue. However, I do have an issue looking for feedback. Just installed the 6048 this weekend and it faulted with 01 - replace fan. Called seller and they indicated to cut the plastic on the left fan. What the heck does that mean? Maybe the cover or see if there is blockage somewhere. Any thought here would be good before I make the 3 hour round trip to the Ranch.
Unfortunately this old fella don't respond to comments
How much is a new board?
hey how are doing i am trying to find a control board for my growatt t spf 8000t dvm
How do you fix error f52
As a engineer I most say this design is the worst design for high frequency inverter those igbt used are very sensitive to heavy load low voltage drop any igbt that use external Shockley diodes to reduce inductive voltage ripple is not recommended for any battery inverter only mains dc use in welders smps I remember using igbt without internal diodes on a inverter design and all igbt blow just by turning it on and turning it off to test the turn on and turn off timing when I replaced with fgh60n60smd the turn on and turn off with perfect so don’t use the igbt that don’t have internal diodes for inverter
So, they designed wrong 😒, Is like a beginner engineering mistake 😒
A battery can cut it's power for any reason, especially when they are in parallel, a fault in communication from battery to battery can cause an emergency shut down, for the inverter to blow up for cutting the power is a design mistake, inverters especially need to be power loss resilient, no mater if MPPT charge the battery or not when the battery is cut off.
MPPT's throw power to battery up to maximum programmed voltage, if battery is disconnected the MPPT need to output maximum programmed voltage till AC power output is higher than the MPPT can give, when output power is higher than MPPT can give the voltage decrease and the inverter enter in low power protection, that's how such inverter need to be designed to work, not this garbage.