Hey guys, has anyone noticed the strange values in the growatt server dashboard? They dont seem to add up all that well to me and I'm wondering if its the dashboard itself that's wrong or something on my end. 

 

Basically below you'll see that I've generated 10.0kWh from Solar, imported 4.6kWh from the grid, Discharged 0.1kWh from Batteries and Charged 10.0kWh, with a total consumption of 9.6kWh today.

But I think its reporting wrongly between the Solar today & Charge today. Since I've been running SBU today with SOL-only charge, there's no grid going into my batteries & I'm able to run all day just on Solar while charging as well with the occasional battery discharge. 

 

If my Consumption today is 9.6kWh & Grid import is 4.6kWh, it should mean that 5kWh went from my panels into my house consumption, meaning another 5kWh into battery?

This is the info from the growatt dashboard, saying they're calculating the charge using the entire Solar produced today and adding any grid charge to it, but surely that calculation is wrong then as it doesnt take solar consumed into consideration?

 

 

Btw I picked this up while building my Home Assistant dashboard a couple of months ago and revisited it today when I did some slight upgrades, think my HA dashboard is more accurate at this point:

 

Edited August 19, 20223 yr by thoc

Their PC app is full of mislabeled data.
The Phone App at least doesn't have the same amount of errors,
My inverter is truly off-grid. The header "Charged" contains my daily and total Solar, i.e. the same data under different labeled headers.

Thats why I use SolarAssistant to get a better overview.
  

Ok cool at least yours is also wonky so its something their end and not mine SolarAssistant is the raspberryPi thing right? 

1 hour ago, thoc said:

Ok cool at least yours is also wonky so its something their end and not mine SolarAssistant is the raspberryPi thing right? 

Correct
https://solar-assistant.io/shop

On 2022/08/20 at 4:30 PM, zsde said:

Correct
https://solar-assistant.io/shop

Hi,

Can you upload some pictures from growatt and solar-assistant dashboards to se the difference?

Than you,

Angel

1 hour ago, onzi said:

Hi,

Can you upload some pictures from growatt and solar-assistant dashboards to se the difference?

Than you,

Angel

Here you go. A full overview of SA

 

 

 

 

Edited September 2, 20223 yr by zsde

@zsde Do you use solar Assistant through the USB port? So the inverter itself is still in charge of management and solar assistant then just reports? 

As I understand solar assistant could be plugged in directly to the batteries instead of the inverter but then it takes over the management from the inverter?

2 hours ago, thoc said:

@zsde Do you use solar Assistant through the USB port? So the inverter itself is still in charge of management and solar assistant then just reports? 

As I understand solar assistant could be plugged in directly to the batteries instead of the inverter but then it takes over the management from the inverter?

Yes, I have SA connected to both the Inverter and my Battery. SA does not take over the Management, it only presents the data from both the Inverter and Battery if both are connected. What SA allows though is some setting changes that can be done on the Inverter itself via SA.
Having said that, SA does allow an override with the Battery SOC management whereby you have an expanded set of parameters to manage Battery SOC within selected time periods.

@zsde Sorry one more question, if your SA is connected to both inverter and Battery, is your battery then not connected directly to the inverter with the CAN/485 cable? Because my Dyness battery only has one port currently going to inverter.

25 minutes ago, thoc said:

@zsde Sorry one more question, if your SA is connected to both inverter and Battery, is your battery then not connected directly to the inverter with the CAN/485 cable? Because my Dyness battery only has one port currently going to inverter.

The Inverter BMS port is connected to the Battery CAN port with a standard Ethernet cable. 
The Pi USB is connected to the Inverter USB and the other Pi USB is connected to the Battery RS232 port with the applicable cable  https://solar-assistant.io/shop/products/hubble_am

Edited September 18, 20223 yr by zsde

Ok cool, my Dyness B4850 only has one CAN/485 available to go from the battery to the inverter & no RS232 ports. So rate I'd only be able to connect to the inverter & not the batteries then.

6 minutes ago, thoc said:

Ok cool, my Dyness B4850 only has one CAN/485 available to go from the battery to the inverter & no RS232 ports. So rate I'd only be able to connect to the inverter & not the batteries then.

That's a pity. Wonder if there is a way to read/extract the BMS data from the Inverter CAN connection independent of the Inverter's own data? 🤨
Maybe @WannabeSolarSparky has some ideas. He tinkers with all kinds of magic.