₦airaland Forum

10th may 2024

Location: Apala
Scope of work: installation of the inverterand batteries.

Obnoxious2001:
4th May,2024

After so many I dey road dey come from SNR man.

We ended up mounting the 9pcs of 580w panels on the roof.
Just I and emeritus D great .

Low-key I was looking for who would assist us considering I was on the roof (asbestos) and emeritus on the ground. But it seem emeritus has finally put his weight lifting to good use .

After we had earlier installed the solar panels, we installed the battery and inverter on this day after @brightk was on malaria 🦟 break.
Battery was gotten from. @valto

17th May 2024
Location: ugheli afesire

Scope of work:
Installation of a DC/solar submersible pumping machine.


Material:
2700wp of PV (450w x 6)
1.5hp pumping machine


As usual we head out from Warri to ugheli via keke Napep

Got to the site and installed the solar panels and connected them to the pump controller.

18th May 2024
Location: FUPRE ugbomro (college of science)

Scope of work:
Installation of solar PV back up system for mathematics department admin office

Material :
2700wp PV
2 x tubular battery 220A
80A controller


This particular project was sponsored by students ( it was assigned as a project topic to the students) and so to avoid stories that matters the HOD of the dept reached out to solar guy (he was an alumni).

The structure we mounted it on is a 1 storey building, but the building height was exceptionally high.


The project featured emeritus the great, solar guy and me.

After our activities at ugheli we spent our weekend installing just the panels (we had installed the internals a day before)...

The job was challenging because the roofing was iron ( we couldn't install rails freely on the roof so we improvised).

Greetings from this side.

It's been long I updated this logbook, actually there are a lot going on behind the scenes (I have actually left Warri and am in Lagos) but my absence has not put any of my activities to halt.

Contractor has been handling our activities in warri, though blessed and emeretus have migrated to Lagos and cross River.

But it is what it is.

So recently, I picked up an after sale role with one of the solar companies in Lagos (I don't want to mention name) but I honestly must confess 9-5pm tuff die , but am in to enjoy the ride and experience that it comes with....

So if you are into repairs hybrid inverters you are all welcome to this space...

I will try to update you all from time to time.

Stay tuned.

I Will likely be posting how we repair and carry out troubleshooting of hybrid inverter.
Error 09, Error 52, Error 53, Error 57 etc.

Mind you I am hoping to pen down this fixs so I can get to learn more about fixing this inverters from senior men who are behind the scenes, then also to help lot of DIY/hobbyist carry out repairs too......

Hopefully I stay committed to updating this logbook.

Back from work and I am pumped up to pen down this amazing experience at work today. The most difficult 09 error i encountered so far

Prior to when I will be updating fault and fixes (I will commence in March) I will love to document This.

Few days back a 3kw hybrid inverter came in for repair, it had error "F09", as usual, we booked it in and followed all necessary procedure..

Fast forward to today, I picked up the inverter after I had a chit chat with the installer about the cause of the failure (obviously the fault was from the installer, but since inverter was under warranty he was very confident to bring it back knowing fully well that we would accept it)

I losed the inverter, did the normal check, found out some MOSFET and IGBT where Fault

Inside my head I was like this Na Moi Moi repair.

I initiated repair process thinking within 1hr it would be done.....

I replaced the high side igbt (this part is responsible for converting the high voltage DC to sine wave AC voltage via a H-bridge arrangements of the igbt)

Replace the battery side MOSFET (this is responsible for converting the battery voltage to high voltage DC which is the. Stored in the bus circuit.) for this particular inverter, it used a centre tap configuration.

I advance to checking resistor, transistor and
All the area bois within the circuit. It was all fine, then I tested the board.

It started normally no sign of failure, then it went completely off. This time around another 5 igbt gone (I had changed 4 earlier) with my MOSFET.

I knew this was not normal so I started suspecting the pwm driver(sg3525 it's response for sending PWM signal to the MOSFET and IGBT for inverting and Charging)

I replaced it and the high side IGBT where okay even after testing...., but the low side was still burning MOSFET out and gives "Error 52" bus voltage low.
A simple transistor driver replacement brought back the invert back on line .

I actually felt reluctant changing it though because it read fine on the board, but since it was not working as expected, I just replaced it and it solved the problem.


This is a quite lengthy, but yes I have fulfilled my obligation to bookmark the most difficult 09 error I have faced about 3hrs of intense brain racking and trouble shooting...

Shout out to my co Engrs whose teasing drew my attention to details I left ....

Happy new month pals.
The time and moment has come .

So let's take it gradually and slow.
I definitely know folks who will like to carry out their personal repairs will be grateful I started this thread.
(Please feel free to ask and post your problems as well, If e pass my power, I go ask SNR man)

We will be starting with Error #bp
(I have used #the_error_code so it can be easy for you to find them when you search for it on the forum)

#bp = battery not present.
This is caused when the inverter can't recognise the battery it has 2 likely causes

1. When battery has been completely drained (some folks still ignore settings the right low battery voltage for the battery. Some will use lead LVD for lithium)

2. When their is short circuit in the inverter

Obnoxious2001:
Happy new month pals.
The time and moment has come .

So let's take it gradually and slow.
I definitely know folks who will like to carry out their personal repairs will be grateful I started this thread.
(Please feel free to ask and post your problems as well, If e pass my power, I go ask SNR man)

We will be starting with Error #bp
(I have used #the_error_code so it can be easy for you to find them when you search for it on the forum)

#bp = battery not present.
This is caused when the inverter can't recognise the battery it has 2 likely causes

1. When battery has been completely drained (some folks still ignore settings the right low battery voltage for the battery. Some will use lead LVD for lithium)

2. When their is short circuit in the inverter

Following

Obnoxious2001:
Happy new month pals.
The time and moment has come .

So let's take it gradually and slow.
I definitely know folks who will like to carry out their personal repairs will be grateful I started this thread.
(Please feel free to ask and post your problems as well, If e pass my power, I go ask SNR man)

We will be starting with Error #bp
(I have used #the_error_code so it can be easy for you to find them when you search for it on the forum)

#bp = battery not present.
This is caused when the inverter can't recognise the battery it has 2 likely causes

1. When battery has been completely drained (some folks still ignore settings the right low battery voltage for the battery. Some will use lead LVD for lithium)

2. When their is short circuit in the inverter

you're doing well,do you repair sachet inverter

obinna37:
you're doing well,do you repair sachet inverter

Yes I do

Obnoxious2001:
Yes I do

I have one that has low ac output voltage,it read 220v on the screen but if you multi meter to check it,it will read 125v

obinna37:
I have one that has low ac output voltage,it read 220v on the screen but if you multi meter to check it,it will read 125v

This is more of a feedback problem.

Obnoxious2001:
This is more of a feedback problem.

can it be rectify

obinna37:
can it be rectify

Definitely.

Obnoxious2001:
Definitely.

that's good, how do we meet

obinna37:
that's good, how do we meet

my contact is in my signature

Obnoxious2001:
my contact is in my signature

ok

Obnoxious2001:
Happy new month pals.
The time and moment has come .

So let's take it gradually and slow.
I definitely know folks who will like to carry out their personal repairs will be grateful I started this thread.
(Please feel free to ask and post your problems as well, If e pass my power, I go ask SNR man)

We will be starting with Error #bp
(I have used #the_error_code so it can be easy for you to find them when you search for it on the forum)

#bp = battery not present.
This is caused when the inverter can't recognise the battery it has 2 likely causes

1. When battery has been completely drained (some folks still ignore settings the right low battery voltage for the battery. Some will use lead LVD for lithium)

2. When their is short circuit in the inverter

Let me be defining some terms. To make this log easy to carry newbies who will be learning while following up

1. H-bridge /full fridge
Basically a H-bridge is a type of switching topology that mimics the Shapes of a "H" it is characterised by a high side and a low side.

When we say High side, this section, doesn't receive 0v directly from the ground or negative of the battery..

It "source" is connected to the drain of the Lower side MOSFET.



2. Push pull
this is a very popular topology used in inverters starting from the days of square wave -modified- sine wave (yes some sine wave inverters still uses it)

It consists of a transformer with a 3 terminal primary winding.
12v-0-12v (the transformer has 2 12v windings in 1. It has 0 as the common point)

3. Drivers/buffer
A driver/buffer is simply a power amplifier/amplifications stage that Receives signal from the oscillator circuit and sends it to the MOSFET (the MOSFET bank)

4. Totem pole:
this is an amplifier/type of drive circuit that uses 2 transistors (bjt) to increase current and drive voltage too.

It usually consists of an NPN and PNP transistor.


5. Oscillator:
This simply the part of the circuit that generates the on-off signal that operates the MOSFET bank.

I have included pictures of a H-BRIDGE and totem pole

Obnoxious2001:
Let me be defining some terms. To make this log easy to carry newbies who will be learning while following up

1. H-bridge /full fridge
Basically a H-bridge is a type of switching topology that mimics the Shapes of a "H" it is characterised by a high side and a low side.

When we say High side, this section, doesn't receive 0v directly from the ground or negative of the battery..

It "source" is connected to the drain of the Lower side MOSFET.



2. Push pull
this is a very popular topology used in inverters starting from the days of square wave -modified- sine wave (yes some sine wave inverters still uses it)

It consists of a transformer with a 3 terminal primary winding.
12v-0-12v (the transformer has 2 12v windings in 1. It has 0 as the common point)

3. Drivers/buffer
A driver/buffer is simply a power amplifier/amplifications stage that Receives signal from the oscillator circuit and sends it to the MOSFET (the MOSFET bank)

4. Totem pole:
this is an amplifier/type of drive circuit that uses 2 transistors (bjt) to increase current and drive voltage too.

It usually consists of an NPN and PNP transistor.


5. Oscillator:
This simply the part of the circuit that generates the on-off signal that operates the MOSFET bank.

I have included pictures of a H-BRIDGE and totem pole

following

This is my own issue
Summary is the inverter always shows battery voltage higher than what it actually is (the range difference is not consistent) so the inverter thinks the battery is full when its not and doesn't charge.
At first I had to get an external cc but It later worsened to the inverter showing 30+V and then shutting off due to over voltage so it has been in storage for months now.
Online search says its a voltage resistor or something that might be bad.
isolar smv 3kw

gadgetplanetng:
This happened again today and the weather is really sunny

I put on the inverter and it was around 27.6v

Connected to the house and the solar charging went off but battery was still draining

I turned off the PV breaker, the inverter then the battery

Turned on the battery breaker,

turned on the inverter it was 27.6v

Turned on the PV breaker, it started charging

When I put on the load in the house, the battery voltage ran up to about 28v plus then the solar charging line went off again

I just tried again, turned off everything

Put on the battery then inverter (27.1v)

Connected the load (It ran up to 28.3v??)

Then turned on the solar and its the same not charging but voltage is now down to 26.9v

I turned on my fridge and the voltage is up to 27.4v but still no solar charging

I'm lost now but the Voltage seems to be all over the place.

Obnoxious2001:
I Will likely be posting how we repair and carry out troubleshooting of hybrid inverter.
Error 09, Error 52, Error 53, Error 57 etc.

Mind you I am hoping to pen down this fixs so I can get to learn more about fixing this inverters from senior men who are behind the scenes, then also to help lot of DIY/hobbyist carry out repairs too......

Hopefully I stay committed to updating this logbook.

gadgetplanetng:
This is my own issue
Summary is the inverter always shows battery voltage higher than what it actually is (the range difference is not consistent) so the inverter thinks the battery is full when its not and doesn't charge.
At first I had to get an external cc but It later worsened to the inverter showing 30+V and then shutting off due to over voltage so it has been in storage for months now.
Online search says its a voltage resistor or something that might be bad.
isolar smv 3kw

Yes that's correct.

There is a short circuit on the resistors at the battery terminal side.

It's a fix you can easily carry out.

I will provide images as soon as I can get hold of it.

It should be something like this.

This is a voltage divider resistor network, that measures the voltage of the Battery input

Thank you so much

Obnoxious2001:
Yes that's correct.

There is a short circuit on the resistors at the battery terminal side.

It's a fix you can easily carry out.

I will provide images as soon as I can get hold of it.

It should be something like this.

This is a voltage divider resistor network, that measures the voltage of the Battery input

Obnoxious2001:
I Will likely be posting how we repair and carry out troubleshooting of hybrid inverter.
Error 09, Error 52, Error 53, Error 57 etc.

Mind you I am hoping to pen down this fixs so I can get to learn more about fixing this inverters from senior men who are behind the scenes, then also to help lot of DIY/hobbyist carry out repairs too......

Hopefully I stay committed to updating this logbook.

Following!!! Mind to tell us the solar company u working with? 😁😁😁

Drgreatone:
Following!!! Mind to tell us the solar company u working with? 😁😁😁

Sako

Obnoxious2001:
Happy new month pals.
The time and moment has come .

So let's take it gradually and slow.
I definitely know folks who will like to carry out their personal repairs will be grateful I started this thread.
(Please feel free to ask and post your problems as well, If e pass my power, I go ask SNR man)

We will be starting with Error #bp
(I have used #the_error_code so it can be easy for you to find them when you search for it on the forum)

#bp = battery not present.
This is caused when the inverter can't recognise the battery it has 2 likely causes

1. When battery has been completely drained (some folks still ignore settings the right low battery voltage for the battery. Some will use lead LVD for lithium)

2. When their is short circuit in the inverter

Back to this bp case.

From experience, I have found out that onces there is open circuit between the 200ohm and the 10ohm resistor, it leads to error BP.
(There might be burnt MOSFET in the high side assuming the MOSFET are not replaced)

The circuit between C124-D59 is a totem pole drive circuit as I explained earlier

Mind you the MOSFET bank in hybrid inverters doesn't receive ground directly...

It's a whole complex systems (I am still even trying to figure out how the design came about)


Also, a very rare case of BP error is when battery terminal gets damaged

Are you good with felicity inverters also?

Antony061:
Are you good with felicity inverters also?

Yes

Obnoxious2001:
Yes that's correct.

There is a short circuit on the resistors at the battery terminal side.

It's a fix you can easily carry out.

I will provide images as soon as I can get hold of it.

It should be something like this.

This is a voltage divider resistor network, that measures the voltage of the Battery input

Pls what's your location so I send this across from Port Harcourt.

gadgetplanetng:
Pls what's your location so I send this across from Port Harcourt.

Am In Lagos State presently. If you are within Lagos it will be easier

Mehn this log book still exists .

Have compltely forgotten about it

Obnoxious2001:
Mehn this log book still exists .

Have compltely forgotten about it

Some of us are following. 😉 Keep up the good work.

Happy Sunday pals and oga I get plenty for here .

So in the spirit of technicality and sharing knowledge, I have finally decided to create a YouTube channel where I post just repair videos(while offer last) but you know Wetin weak me pass?

Na the video editing , for now we just need to manage what we see .

By the way it's going to be purely Pidgin English for the voice over( I am obviously going to stress other folks who are not Nigerians)

Then I will also be providing a PDF free downloadable documents guiding with images every points/parts that needs to be checked.


Why have I decided to do this?

I couldn't find a Nigerian YouTube channel that successful taught repair (the technicality) we have lot explaining block diagram and all....

But I go cast everywhere for free meanwhile I go need still tender official apology to all the senior men whey dey the business....

But till then, you can always ask your questions and I will definitely find ways to help out if possible