SOL-I-AX-5P for Backup initially

[mojive]

Hi All,

To all here, Thanks for this Great forum and appreciate all the knowledgeable contributors.

Need advice:

Looking at installing for a friend an Axpert SOL-I-AX-5P with Pylontech US 3000 just for Backup now during loadshedding. Solar panels to be added later.

The backup loads will just be lights and essential plugs. No high power consumers.

Also using the SOL-I-AX-BACKBOARD for connecting the inverter.(see attachment)

Questions to clear up.

1. If the inverter is connected with the DB via a changeover switch (Inverter/OFF/Bypass) and it is on Inverter will the Grid power be limited to the AC power output of the inverter?

So there is no load shedding and the total loads are say 6.5 kW will this be a problem. The idea is to leave the inverter ON so will automatically backup loads during loadshedding.

The Bypass is for maintenance or inverter problems.

2. The other quandary I had after reading other posts here was about the N-E bonding and if this is necessary with the SOL-I-AX-5P. And if so how this will be done.

All good advice/ wiring diagrams will be appreciated.

Thanks in advance

Backplate-Wiring-Diagram-SOL-I-AX-BACKBOARD.pdf

[Coulomb]

On 2020/07/23 at 9:59 PM, mojive said:

The backup loads will just be lights and essential plugs. No high power consumers.

Also using the SOL-I-AX-BACKBOARD for connecting the inverter.(see attachment)

Sorry, I find that attachment totally confusing, with respect to how the changeover switch is wired.

On 2020/07/23 at 9:59 PM, mojive said:

1. If the inverter is connected with the DB via a changeover switch (Inverter/OFF/Bypass) and it is on Inverter will the Grid power be limited to the AC power output of the inverter?

It depends on how this changeover switch is wired.

On 2020/07/23 at 9:59 PM, mojive said:

So there is no load shedding and the total loads are say 6.5 kW will this be a problem. The idea is to leave the inverter ON so will automatically backup loads during loadshedding.

The Bypass is for maintenance or inverter problems.

Assuming you wire it up properly, your 6.5 kW loads (presumably not just the essential ones) won't go near the inverter, so that will be fine.

On 2020/07/23 at 9:59 PM, mojive said:

2. The other quandary I had after reading other posts here was about the N-E bonding and if this is necessary with the SOL-I-AX-5P. And if so how this will be done.

I don't know the South African situation well enough to comment.

[mojive]

Thanks for the response.

6 hours ago, Coulomb said:

Sorry, I find that attachment totally confusing, with respect to how the changeover switch is wired.

Regarding the wiring diagram(got it from the web) I see that the labels AC INPUT is shown twice which is incorrect.  It is a pre-built  board for the Axpert inverters.

Thus it is from the LHS  AC INPUT, AC OUTPUT and then Transfer Switch.

I have redrawn the wiring to the best of my ability here please see attachment.

Need to figure out the DB connections now.

Thanks

 

inverter_backboard.pdf

[Coulomb]

14 hours ago, mojive said:

I have redrawn the wiring to the best of my ability here please see attachment.

Your version makes much more sense.

[mojive]

Hi Guys,

Does someone have the specs for the SOL-I-AX-5P.  Need to plan the PV panels first and see what is accepted into the inverters Solar Charger, that is Voc and MPPT range and max power PV panels allowed.

[wolfandy]

7 hours ago, mojive said:

Does someone have the specs for the SOL-I-AX-5P.  Need to plan the PV panels first and see what is accepted into the inverters Solar Charger, that is Voc and MPPT range and max power PV panels allowed.

A quick googling brings up many links to the specs, e.g. here

[Coulomb]

18 hours ago, mojive said:

max power PV panels allowed.

This figure is hard to pin down. Someone reported a Voltronic Power tech saying that 120% of rated SCC power is acceptable. For most 5 kVA models, including the SOL-I-AX-5P, this will be 4800 W.

Edited August 20, 2020 by Coulomb
Added "SCC"

[mojive]

Thanks