Solar panel production figures

HungryHippos said:
Speaking hypothetically of course, but it's a 3-pronged assault. Aerial (Seagulls), Ground (squirrels) and Special Op forces (as yet unknown to you).

Not orchestrated at all, honest!
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It seems the special Op forces arrived today, not quite sure they took out the intended target though, or did my spies intercept their orders? ;)

No idea why the neighbours decided to cut the tree down, it was a rather large tree, which did cast a late afternoon shadow on the garage, probably more so in the winter though, by the time I came home from work it was completely gone.

Tree-Gone.jpg


katie279 said:
@Ron-ski will be pleased to know I had a couple of solar guys around yesterday to size up the roof for fitting extra panels.....
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Nice, don't forget to let us know all the details, are you adding more inverters?
 
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@qbhatti I've replied in the correct thread for those sort of questions

Solar panels and battery - any real world reccomendations?

How do you space the mounts for the rails? Roughly every 1200 enough? I assume you start where the fist rafter is and work it that way? i am no expert so feel free to ignore... but this may be worth knowing if you dont already. One thing the guy who surveyed our house before we had solar said...
forums.overclockers.co.uk forums.overclockers.co.uk
 
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Got mine too well trained, I said we should put the dishwasher on this morning, she replied "But the washing machine is on and we can can get the lunch things in", I'll let her have the second point, but with our system it doesn't really matter, so long as its not used unnecessarily. Washings been on the clothes line all day ;)

PS. 16:45 and we have 3kW of solar, I'm sure the disappearing tree is helping :D
 
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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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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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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.
 
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