Soldato
5kwh today, was pretty hazy until about 1pm here.
Solar panels and battery - any real world reccomendations?
- Thread starter GinG
- Start date
Associate
13.6kwh today - beautiful blue skies all day, despite being freezing cold!
Soldato
5.6 today, bit better
Was out all day so could be the first day we pay for no full priced grid units.
Batteries at 39% so about 2.5kw usable left I would guess, unlikely we will use that before charging starts at 0:30 with them glorious 7.5p units
Was out all day so could be the first day we pay for no full priced grid units.
Batteries at 39% so about 2.5kw usable left I would guess, unlikely we will use that before charging starts at 0:30 with them glorious 7.5p units
Soldato
But thats practically best scenario this time of year, colder = more efficient panels
I am planning to LN2 cool mine this summer when I look to set the ronskisstats record for efficiency
Soldato
Lapping heatsinks and active cooling around the inverter should be the next project spinoff?
Soldato
Water cooling is what you want, or rather water heating and it actually exists.
Soldato
Yeah saw them some time ago, makes sense to try to cool them and take advantage of the heat they are generating
Soldato
A poor 0.40kwhs today after yesterdays sun
Soldato
0.3 grim day, tons of overnight rain.
Associate
I'm looking at getting this 3.6kWh inverter installed with 6.8kW of panels. Can I just ask if you ever experience clipping with this set up? The way I understand it this should be able to output 3.6kWh AC while also charging the batteries, is that correct? So I would only really experience clipping once the batteries are full?
Soldato
Won't a 3.6kw inverter clip your entire panel solar production to also being 3.6kw?
At that sized system I'd also want a 5kw inverter I think, at least.
Soldato
- Joined
- 19 Oct 2010
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I've a 3k inverter on a 4k system. It punches quite well. It's not what i'd have bought but it's what the house had.
Soldato
Having inverter a bit below output is probably fine, but by having it basically 50% a lot of the spring/summer generation will be clipping.
Soldato
0.93 today so much variability
was raining or deeply cloudy most of the day
was raining or deeply cloudy most of the day
Associate
This is what I initially thought but according to the Sunsynk CEO the MPPT of the 3.6kWh is 7kWh. So theoretically the inverter part will output 3.6kW AC but it can also charge the batteries at the same time. So the only time you get clipping is once the batteries are charged and more than 3.6kW is being generated by the panels. https://youtu.be/XGlOKQHVgww?t=150
Soldato
I see, so if the battery needs charge it will go beyond 3.6kw from the panels until it's full, then after that it will clip the solar to the 3.6kw for the purposes of house consumption or exporting.
Still though, on a good summers day you'll fill the battery pretty quick and then be clipping excess generation I think. SEG rates are pretty bad right now, but if that changes one day it will limit your export capacity a bit.
Does make me wonder why so many panels though? the only benefit I can see is that they'll perform a bit better in the months like Nov - Feb where generation is not that great, but you'll suffer the same sub 1kwh days we all get no matter how many panels you have when the rain comes down all day.
Associate
I know what you mean about future SEG rates - that's the only thing stopping me accepting the proposal right now. I think it's inevitable that SEG rates will have to improve and knowing my luck it will happen straight after my panels are installed!!
The reason I've gone for 6.8kW of panels is because my roof is pretty small and faces South-East so I've opted to have panels on the North-West side too. They won't do much in winter but it's a 3-storey townhouse so they get daylight all day in summer. According to OpenSolar I would only get clipping losses of 0.4% but I'm not sure how accurate that is.
Man of Honour
Looks like the beast from the east is going to give us a months worth or grey windy rainy weather... At least down south.
Soldato
What is the quote/price like? Also how much electric do you use daily?
Various quotes have been posted here in the past, so you can sort of see if it's ballpark good or not.
A lot of solar firms are charging a lot of money at the moment due to demand.
Various quotes have been posted here in the past, so you can sort of see if it's ballpark good or not.
A lot of solar firms are charging a lot of money at the moment due to demand.
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Associate
£12,295 with a 5.12kWh Sunsynk battery. I know it's a lot but I don't think prices are going down any time soon with inflation at 10%.