Hi guys,

I don't know much about Axpert inverters and it's my first time trying to figure these settings out.

I am helping a family member out because their electricity bill has gone up after installing solar.

I currently have a Deye inverter and have set it up to charge the battery only via solar during the day, and then to have a period where it will use the grid to charge it up to a specific value in time for the evening (if I had a bad day with production). - I have attached a photo.

I am trying to figure out how to do something similar on an Axpert inverter. Is it possible? I have been trying to change the output source priority and charging source priority with the use of timers, but I haven't come across an option to get it to a specific SOC %.

Does anyone know how to do something like this? They are using WatchPower, I'm wondering if using SolarAssistant will make this easier?

Inverter is a Axpert MAX E Twin 11KW

The 8:00 to 16:00 slot is conflgured to use eskom power to supply the load until the batteries reach 95%. So the PV is just used for battery charging and not for the load during the day. 

Unfortunately the axpert  does not have an system work mode that the deye and sunsynk has . 

There is only charge from pv or utility or both and they will charge to what volts is set in   bulk and float charge parameters . 

If charging from pv it will only charge in the day and battery will rest at night .

If charging from utility it will float  24/7  .

If you charging from pv only and you have a bad rainy  day or 2 intervals of load shedding at night you will have to manually set utility to charge between load shedding .

 

 

Edited June 22, 20232 yr by GMAC

Have a look at Solar assistant.

This will allow you to set the state of charge at different times and also allow you to make changes remotely.

Hi,

I can only relate to what I have my system do currently.

My source charge priority is Solar Only, but have also pre-set the following: Max Charge 30A, max utility charge 20A. Now it doesnt use the Utility, since I set it as Solar only, but when a rainy day hits, I just amend the Charge Priority to Utility, to charge up the batts.

I am also effectively load shedding myself between 8pm and 8am, running totally off grid.

What you can however try is set the following:

Output source to Solar First

Max Charge current to 10A

Max Utility Charge 2A

Charger Source Priority CSO - Solar Charge first priority

Now to charge batteries at 10A from Solar doesn't require much sun, but for a rainy day, this might fall down to 5A, but it will still charge. The moment the Solar falls too far and cant charge up the battery 2A will be drawn from Utility. This will keep bills low.

 

What I want to know is what is the electrical use requirement, do you run total off grid when sun goes down, or do you still rely on grid, and only use the system for backup, etc.

Cause if you actually try and use as little Eskom as possible, you can same as I did install a CBi astute at Inverter In.

If you use the system to power the house fully, but want some battery charge, just set the Astute to switch on and off between certain times, yes you wont be able to hit a specific SOC level, but frankly why do you really want to. a Cycle is a cycle, and difference between 80% and 90% as example makes little difference.

 

So broaden the specific requirement a bit further. Maybe something I am doing is aligned and may help with what you want to achieve.

 

As I understand you picture:

You want the grid to charge the batteries to 95% SOC between 4 and 6pm and then ensure the SOC is kept at 80%, until 8pm.

In other words if your system is able to have the battery at 80% by 8pm, you are golden.

Do you use Eskom power between 8pm and 4pm the following day?