Hi everyone, I bought a new battery and would require a new CoC after installation. I would appreciate it you could let me know if there are any red flags on my current setup that I could fix prior to getting someone out to do the CoC. Thank you.

2 hours ago, mocodo said:

Hi everyone, I bought a new battery and would require a new CoC after installation. I would appreciate it you could let me know if there are any red flags on my current setup that I could fix prior to getting someone out to do the CoC. Thank you.

Wouldnt you just be removing the positive and negative and connecting the new battery with comms cable? Or did you change the DC Isolator/Breaker also? I dont see where the complication is if you had an exisitng install.

Is it a replace battery situation or added a new battery?

On 2026/02/25 at 12:35 PM, mocodo said:

red flags

Is there a neutral to earth bonding device?

@mocodoLet me give this a bit of a shot....but just remember, treat a comments, not as gospel.

I'm not an Electrician, just an engineer with a bit of OCD, and these are some thing you may need to pay attention to:

1) Split AC & DC ...shouldn't run in the same conduit.

2) Conduit / trunking for DC should preferably be made of metal.

3) I believe from end last year, new SANS regulation specifies even split conduit for PV wiring. TBC.

4) Labelling....lots of it. I see no labelling (unless it is on the Inverter cover), but even inside the new DB's, every item needs to be labelled. The next guy that owns/going to work on it doesn't need to figure out what is where.

5) Warning Signs..Lot's of it, especially on the other (main & sub) DB's in the house.

6) You didn't specify if you are adding a master battery or just adding another slave. If slave, add a disconnect for that battery, and a master disconnect for all batteries. Yes it's a schlepp, but it does make maintenance easier when the time comes (much later). Alternative, you need to ensure that the fuse in the current disconnect is upgraded to handle the increase amperage. (only for adding a slave battery)

General:

1) If possible, get the comms cable sorted between Inverter and battery. Just make life a bit easier with knowing a bit more of what is going on your system.

2) As already mentioned, Earth/Neutral bond, if applicable to your grid supplier.

3) What's with the yellow & blue wires going to the Aux port? Try and keep all types of AC wiring the same. Running out of Red wire is a lame excuse.

4) The wires to the load port looks very thin to me. You should try and route the 3 AC port directly down to the trunking, one set of wires in each flex conduit. Try and find another way to route your CT coil. Maybe rather use one of the empty ports behind the PV ones. I used one of the 3 comms ports (behind each other) next to the big battery port.

5) The plug for the Prepaid. Where is the RCD and CB for that.?

6) If you Inverter is going to work very hard (as most 5kW's do)...then make provision for fans, either at the bottom or on top to push/pull the hot air out.

7) In Change Over DB: From rhs. in position 3 & 4. Look like the have a LED illuminated of sorts. If it is the Grid and Inverter "Live" indicators, then good.

8) Same for position 3 & 4 from lhs, those looks like type 2 SPD's. Good if so. (may just be a reflection, like on your PV DB).

5 minutes ago, Sidewinder said:

@mocodoLet me give this a bit of a shot....but just remember, treat a comments, not as gospel.

I'm not an Electrician, just an engineer with a bit of OCD, and these are some thing you may need to pay attention to:

1) Split AC & DC ...shouldn't run in the same conduit.

2) Conduit / trunking for DC should preferably be made of metal.

3) I believe from end last year, new SANS regulation specifies even split conduit for PV wiring. TBC.

4) Labelling....lots of it. I see no labelling (unless it is on the Inverter cover), but even inside the new DB's, every item needs to be labelled. The next guy that owns/going to work on it doesn't need to figure out what is where.

5) Warning Signs..Lot's of it, especially on the other (main & sub) DB's in the house.

6) You didn't specify if you are adding a master battery or just adding another slave. If slave, add a disconnect for that battery, and a master disconnect for all batteries. Yes it's a schlepp, but it does make maintenance easier when the time comes (much later). Alternative, you need to ensure that the fuse in the current disconnect is upgraded to handle the increase amperage. (only for adding a slave battery)

General:

1) If possible, get the comms cable sorted between Inverter and battery. Just make life a bit easier with knowing a bit more of what is going on your system.

2) As already mentioned, Earth/Neutral bond, if applicable to your grid supplier.

3) What's with the yellow & blue wires going to the Aux port? Try and keep all types of AC wiring the same. Running out of Red wire is a lame excuse.

4) The wires to the load port looks very thin to me. You should try and route the 3 AC port directly down to the trunking, one set of wires in each flex conduit. Try and find another way to route your CT coil. Maybe rather use one of the empty ports behind the PV ones. I used one of the 3 comms ports (behind each other) next to the big battery port.

5) The plug for the Prepaid. Where is the RCD and CB for that.?

6) If you Inverter is going to work very hard (as most 5kW's do)...then make provision for fans, either at the bottom or on top to push/pull the hot air out.

7) In Change Over DB: From rhs. in position 3 & 4. Look like the have a LED illuminated of sorts. If it is the Grid and Inverter "Live" indicators, then good.

8) Same for position 3 & 4 from lhs, those looks like type 2 SPD's. Good if so. (may just be a reflection, like on your PV DB).

Awesome feedback, thanks @Sidewinder

Looks like my best option is to bite the bullet and get a professional to sort it out.

Can't beleive I ever got a CoC for this system. Must have been a back handed deal with the installer.