Solar panel production figures

Its grim here to, battery got to 98% by 5am, then dropped, got back to 99% and now discharging, with just 750w of solar. Pretty much rain forecast all day, and for tomorrow, Tuesday onwards improves.

FNG said:
Does anybody know why, when my battery did not drop below 45% over night, I still consumed some power from the grid. Only 0.1kwh, in small blips if 100w or so in the early hours of the morning, but I would have thought it should all be covered by the battery. It is a solax hybrid inverter. My guess is the amount is so small it doesn't have time to kick in before it grabs it from the grid, but I admit that is just a random guess.
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Basically the inverter needs to raise the voltage very slightly above grid voltage to supply your equipment, to do this it needs accurate readings (both voltage and import/export current flows), and then it depends on the reaction time of the inverter. When a load kicks in it will drop the voltage slightly and draw a little from the grid until the inverter reacts, its probably when a fridge freezer kicks in, during the day there's more going on so you probably don't notice it. That's my basic understanding anyway.
 
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from my account now from yrsterday (top is cut off but it's import) below is export you can see there is a dribble imported through out the day even when I am generally exporting or charging / running off battery. I used to worry about every wh when i started as well. now I just look at the big picture and do not sweat the small stuff

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It's really not worth worrying about tiny bits of grid import or export, its just what it is. On the Victron system you can set the grid set point, which is what the system aims to achieve, but it always fluctuates a bit. I have set mine to 0w, unless I want to force discharge then I set it negative :D
 
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I believe most systems need to import a trickle to check the grid is up and running, since they must by law turn themselves off if its not.
(its part of the UK and most countries regs).
Systems with islanding would function slightly differently but fundamentally the same. If the grid is down they must switch to island mode and prohibit grid export.
 
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I'm feeling rather specifically targeted right now

grNqgY4.png


well, just me and 12 million other people in the london area I suppose... :cry:
 
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Yesterday was ok, today the battery is flat and I've generated 3kWh total so far.

Only upside is I broke the 1000kWh mark just over 2 months from install :)
 
Turning on the hot tub the day before the the sun decides to disappear means my month of April may be more expensive than it was tracking for.

Terrible production day, 4.6kwh (8% battery) at 2.30pm so I will be lucky to hit 7kwh.
 
Mercenary Keyboard Warrior said:
I believe most systems need to import a trickle to check the grid is up and running, since they must by law turn themselves off if its not.
(its part of the UK and most countries regs).
Systems with islanding would function slightly differently but fundamentally the same. If the grid is down they must switch to island mode and prohibit grid export.
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They can't do it via importing, or measuring the voltage, as they'd measure their own voltage. Not sure how other inverters do it, but I suspect it is the same. Victron inverters attempt to alter the frequency from 50Hz, when the grid is present they simply can't change the frequency, once they can they know there is no grid and do what they have to do.

On my system I've actually seen this happen when I switched the grid off, the Victron inverters frequency went up very slightly, and my SolarEdge inverter shut down, and it restarted once the Victron settled back to 50Hz. It is also how the Victron controls the SE Inverter when there is no grid to stop it producing too much power if the batteries are full, it raises the Hz enough for the SE inverter to shut down.
 
miserable day here but still managed 12.3kwh

exported 8kwh which leaves me in credit for the day (imported 6kwh)

does anyone here a
have a problem where sometimes their generation stats get confused with battery charging? it's weird, sometimes the generation stats are correct and sometimes they are not it isn't consistent.
for instance I started this morning with the 5kwh that I took from the grid added to my solis stats as generated energy
it's no big deal other than it skews my long term stats for my weekly and monthly etc generation.

other days however it works correctly and does not count the battery charging.
 
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The FoxESS server went down for 24 hours maintenence with no warning today so I've had no information whatsoever. All I know is the battery did eventually reach 100% at 4pm and we started exporting at about 500Wh.

It's very annoying not having the data accessible locally.
 
reef said:
The FoxESS server went down for 24 hours maintenence with no warning today so I've had no information whatsoever. All I know is the battery did eventually reach 100% at 4pm and we started exporting at about 500Wh.

It's very annoying not having the data accessible locally.
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you can apparently get the data locally using modbus in HA and using the USB port from your inverter, however there is a bug with certain versions of the firmware so need an upgrade to get around that
 
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