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Updated:  17/05/2012 06:00 
 

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    Solar PV Generation - Live Performance Data

    There are few software solutions to gaining access to the inverter data, all require the use of a pc. The inverter comes with Aurora Communnicator CD pdf manual, there is also Aurora Monitor, a Java application, Aurora Monitor and a command-line program for Linux Aurora

    My aim is to write a php script(s) to run on my server, which will do away with the need for a home pc, the script will be called by a cron job every 2 mins, generate the data as seen below and also produce graphs. See the eNet-232 Ethernet to Serial converter section below for more information.

    Check out also Data gauges - Solar map - Data table only


    Newquay Weather Solar PV Output

    SkyCam - NW    		 Power One 3.6 PVI OUTD - ONLINE
     
    17 May 2012 Sunrise : 05:26 Sunset : 21:06
    Inverter Data Updated Every 2 Minutes
    1 - Week starts Sunday
    2 - install date 4/3/2012
    3 - Slight difference of 40w
    4 - Max 3614 W UK Model (G83)    		 5 - For other codes see manual
    6 - Data entered manually [from meter]
    7 - Efficiency, power out / string total %
    8 - GMT all year    		 9 - Checked 0800,1200,1600,1800
        Reset after check
    10 - C02 conversion factor is
        0.542 kg CO2 saved per kWh
    Last Update 17/05/2012 06:12 String 1 6 W Grid Voltage 246.5 V
    System On Time 6 16/5/2012 05:42   208 V Grid Current 0.1 A
    System Off Time 6 16/5/2012 20:38   0.1 A Grid Freq 50 Hz
    Energy Today 0.255 Kwh String 2 8 W Peak Power Today 12 W
    Energy Week 1 58.272 Kwh   214 V Peak Power Ever 4 3614 W
    Energy Month 294.734 Kwh   0.1 A Internal Temp 20.0 C
    Energy year 2 1294.455 Kwh Total 14 W Alarm Code 5 No Alarm
    Energy lifeTime 3 1294.495 Kwh Power Out 15 W Isolation Resistance 20 MΩ
    Min Day Energy 6 22/2/2012 - 941 w Efficiency 7 107.14 % Inverter Time 8 5:12
    Max Day Energy 6 13/5/2012 - 27.5 Kw     CO2 Saved 10 702 Kg
    Last 4 Alarms Codes 9 Last check 1800 0 0 0 0
    Last Alarm Code 30/04/2012 06:08, 11 Bulk UV

    Solar Graphs available from 12th February 2012.

    Default todays graph if available

    Latest
    2/5/2012 - Trying out new graph package
    28/4/2012 - Fixed division by zero errors and power FP sorted (hopefully)
    27/4/2012 - Added CO2 saved, added fudge factor to avoid early close down
    22/4/2012 - Automated update of month/year graph

    Todays PV output

    Select a monthly Solar PV graph



    Month and Year graph now updated every 2 minutes




    Trying new graph package below
    Chart.






    System consists of:-

    Panels: 16 Suntech STP250S (250 watts)
    Inverter: Power One PVI3.6 OUTD
    Roof Angle: 32°
    Direction: 150° (30° east of south)
    Shading: Palm tress, removed

    System Live: 4th February 2012, approx 2pm
    		 inverter
    PVI3.6 Inverter mounted in garage.     		pv panel
    Suntech STP250S
    The eNet-232 Ethernet to Serial converter
    The Aurora Power One 3.6 OUTD inverter has a usb port and more importantly a RS485, we need network access for the php scripts on the server so we need an RS 485 to ethernet converter. The eNET-232 Audon Electronics has a two serial ports, one RS232 and the other can be a RS232/422/485 RS485 port. We need the RS 485 option, easy to set up, 3 wires to strip block in inverter to enet 232 strip block wired straight, T-, T+, GND.

    The configuration software for the enet232 can be downloaded from the Audon site
    		 converter
    The enet-232 Ethernet to Serial converter.

    Cornwall Solar Panels

    I highly recommend them, planned and fitted with first class service from a local company.

    Give them a call and please mention Newquay Weather.     		cornwall solar panels

    Script, progress:

    28/4/2012 - Fixed division by zero errors and power FP sorted (hopefully)
    27/4/2012 - Added CO2 saved conversion factor of 0.542 kg CO2 saved per kWh
    22/4/2012 - Automated graph for month/year, year month text totals to do
    20/4/2012 - Added email of alarms
    17/4/2012 - Added Inverter time, GMT all year
    16/4/2012 - Sorted temperture bug out, just power now
    15/4/2012 - Added solar data only page, ideal for mobile
    14/4/2012 - Fixed current (amps) floating point issues, just watts/temperture now. Added skycam to panel and year graph
    1/4/2012 - Addedd monthly graph selection
    28/3/2012 - Added month graph and calendar for past graphs, redesign of data table, no progress on floating point errors.
    11/3/2012 - Graphing added, Issues still with floating point conversion, low values give rubbish so data not always correct. Cron job now to update data every 2 minutes. Some data is entered manually and might not be current. Still a few bugs, floating point conversion, error checking, alarms still to do
    Date picker for past graphs, list goes on
    11th Mar - Graphs now from data from script, Aurora Monitor not used now for graph.
    3rd Mar - Progress made, some is now displayed, floating point issues with some data.
    23rd Feb - Making progress with script, displays state of inverter, updated every 5 mins.
    22nd Feb - Have added graphs from the 12th Feb, now started work on live data script.
    21st Feb - At 10:15 this morning from the generation meter, knocked up 100 Kwh
    19th Feb - Seems the new RS485 Converter may be faulty, loses the LAN connection occasionally.
    15th Feb - Bought a new RS485 converter, hooked it up and working, down to scripting now.
    12th Feb - Todays graph added. very much a work in progress
    9th Feb - Cannot get sollae convertor to work with the inverter, must be faulty.
    7th Feb - Can't get the sollae converter talking to the inverter.
    6th Feb - Run comms cable under bungalow to inverter, as the inverter is solar powered, can't test till morning.
    4th Feb - Finished, raining all day
    Installation date 3rd and 4th February 2012, 4Kw system