Posted by Rick F. on July 19, 2007, 6:10 am
Well.. We're going to have 2 inverters later this summer (perhaps late August?),
but I'm not sure if I'll have the data logger right off the get-go or not due
to funding issues.. (we're over budget)..
I've not seen anything like that floating around, but I think that RRD is
a good choice at this point -- I've used it before and you're correct that
your info may be lost if you recreate or reconfigure the database..
Anyway, if I get my inverters with the datalogger, I'll drop you a note
later this summer if you're still stuck..
Posted by Christian Kaiser on July 31, 2007, 6:32 am
Look at www.invest-tools.com/pub/solsys, click "PV System > Graphs" at the
left side ;-)
This does not yet include the historical data stored in the DataLogger
(unimportant for anyone whose computer is always running), but it also shows
the public net's voltage and frequency deviations, which is fun to watch,
and a computed power of direct sunlight to compare scattered and direct
light's influence (the interests of a physicists...) ;-)))
There's still a lot of road ahead (monthly overview, ...), but I see the
Posted by Rick F. on August 1, 2007, 5:32 am
Excellent! Very slick if you ask me! I ordered the other day a few of the
COM cards for our two inverters that will be installed in the middle of August..
I'll probably be ordering the Data Logger Pro and sensor box next week, so
you'll have a guinea pig to test the dual-inverter setup sometime in October
after we move back into the house.. I'll be taking lots of photos of the
work and can post a weblink if anyone is interested in the Solar panel install
Posted by Christian Kaiser on August 1, 2007, 10:20 am
Yes, I need these guinea pigs ;-)
I found someone with multiple inverters who sent me a comm protocol and
already included that feature - inverters should be automatically found and
added right now, but handled individually (possibly one feature will be a
comparison chart of all the local installations, let's see). I am also
thinking of simulating SolarLog data, so that applications like SunnyReport
can process these also.
For each installation you can give information about the azimuth and tilt of
the panels, so that the theoretical solar energy curve can be calculated
(which is of limited use, but fun). Also you can tell the program a "safety
time interval" from sunset and sundown which will prevent the program to
inform you about an inverter failure during that time, as these inverters
tend to send lots of errors in the morning and the evening. Sunset and
sundown are already calculated for the locality (given longitude and
That's it for now. I'll keep you informed.
Posted by mas1683 on August 27, 2007, 6:05 pm
Is it possible to share the software that you wrote to get the data
out of the datalogger? Currently I set up a computer macro to
download the detailed information every 5 minutes to a .csv file to
read into a database. If there is another solution to get the same
data without having that macro running it would be great benefit.
FYI: I have one Fronius IG 2500-LV with a com card and datalogger easy