Fronius bug/discrepancy Donator vs Free


Hi folks,

I have now got a few months worth of data collected from my system using two different upload methods:

  1. PVOutput Donator-based service. More or less correlates with data from

Settings: Fronius Daily Log
SolarAPI v1 - Logdata - Data by HTTP POST every 1h / /

  1. PVOutput free service (same inverter, different settings, does not correlate with (1) or

Settings: Inverter to PVOUTPUT
SolarAPI v1 - CurrentData - Inverter by HTTP POST every 5m / /
Settings: Meter to PVOUTPUT
SolarAPI v1 - CurrentData - Meter by HTTP POST every 5m / /

There are discrepancies between the datasets - more or less, once the system starts generating power
the power used figure in the free system (2) is wrong. I have experimented with various settings on (2) to try to bring it into line with (1) without success.

Am I doing something wrong, do I need to update firmware, or is this a bug (‘feature’)?
The meter is the generic modbus “Fronius Smart Meter” I think the model is a 63A-3.

Is it possible to get this meter and inverter combination to show solar data correctly on using the onboard settings and a free PVOutput account (if so, how?), or is it never going to work properly unless my status is ‘Donator’?




Hi Saliya ,jim here.i see in the Detailed year view each system has the same numbers for the 6 stats it records ,small difference’s will be seen in the live views because 5 min data is averaged over 5 min and the hour log push is averaged over 1 hr, so because one is 5 min and one over a hour the curves will slightly different, however as the year view says both systems are doing exactly the same in all 6 recored parameters, hope this helps.


Hi Jim,

really appreciate the response, thanks. I don’t think it’s to do with
the logging interval but happy to try different settings out (e.g. hourly

It seems to me that the Energy and Power Used figures that don’t agree;
and they only disagree while the system is making power.

For example, if you look at yesterday’s data in both views:


between say 7am and 4pm, you’ll see what I mean.

Is this expected behaviour?




So, you’re basically concerned about discrepancies in the red consumption lines in the two systems, is this correct?
Consumption doesn’t come from the inverter - the inverter system has no idea what you’re using, it only reports the green generation line.
Consumption comes from the meter system - so best to concentrate on the meter upload commands in each system.

System 1 red consumption line looks fine.
The pattern in the second system, where during sunlight hours consumption drops to zero and has gaps with no data, usually means you have a ‘net’ setting wrong - and the system is subtracting the green generation line from the uploaded red consumption data, and getting negative numbers (which plot as 0 or blank).

Check, for both systems, the settings page in the ‘Advanced Settings’ section that you have consistently the same settings for ‘Net Calculations’, ‘Net Power Tracking’, and ‘Net Method’.

Also, in System 2 your Meter upload line has ‘&n=1’ (which indicates the data should have the net calculation done) while the System 1 Logdata line does not have a ‘net’ setting in it. Try setting ‘&n=0’ in the System 2 ‘Current Data Meter’ upload line instead to turn off the ‘net flag’ and see what happens.



Donation mode allows the additional hourly ‘Log Push’ which usually matches the data sent to solarweb. The 5-minute push feed between the inverter and the net meter can sometimes be unreliable depending on the firmware / setup etc.