Panels overheating or simply not suited for hot weather?
Re: Panels overheating or simply not suited for hot weather?
You only had to read the single post I linked from the 45 pages.
https://camelot-forum.co.uk/phpBB3/view ... 9562#p9562
The science behind the parallel strings into a single MPPT in case your interested.
https://docplayer.net/1067023-Efficient ... acker.html
I found that with a global peak algorithm my SMA inverters do, some shading could also be accommodated. There are losses but they are small, and running a global peak algorithm when its not needed also loses a bit too. The decent inverters allow you to turn it on or off and change the scanning interval.
https://camelot-forum.co.uk/phpBB3/view ... 9562#p9562
The science behind the parallel strings into a single MPPT in case your interested.
https://docplayer.net/1067023-Efficient ... acker.html
I found that with a global peak algorithm my SMA inverters do, some shading could also be accommodated. There are losses but they are small, and running a global peak algorithm when its not needed also loses a bit too. The decent inverters allow you to turn it on or off and change the scanning interval.
16.9kW PV > 102MWh generated
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5 Other RE Coop's
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GSHP + A2A HP's
Rain water use > 500 m3
Ripple 6.6kW Wind + 4.5kW PV > 19MWh generated
5 Other RE Coop's
105kWh EV storage
60kWh Home battery storage
40kWh Thermal storage
GSHP + A2A HP's
Rain water use > 500 m3
Re: Panels overheating or simply not suited for hot weather?
nowty wrote: ↑Sat Sep 30, 2023 12:05 pm You only had to read the single post I linked from the 45 pages.
https://camelot-forum.co.uk/phpBB3/view ... 9562#p9562
The science behind the parallel strings into a single MPPT in case your interested.
https://docplayer.net/1067023-Efficient ... acker.html
I found that with a global peak algorithm my SMA inverters do, some shading could also be accommodated. There are losses but they are small, and running a global peak algorithm when its not needed also loses a bit too. The decent inverters allow you to turn it on or off and change the scanning interval.
Alas, the E facing is a non starter ^^ - swmbo wont have it.
West + W look like I could get away with a single string and S1 seems fine as another, but S2 would just not worth it I suspect..especially for a single panel..my exposure with shading hasnt been good thus far.
PV 1.1kWh
Victron Multiplus 8K II 48v/100A + Victron 150/35 charge controller + lynx 1000
CerboGX, 25kW Pylontech batteries
Octopus Agile - Cheaper Battery Charging
Another 2.3kWh on the horizon - ground mount+575's
Victron Multiplus 8K II 48v/100A + Victron 150/35 charge controller + lynx 1000
CerboGX, 25kW Pylontech batteries
Octopus Agile - Cheaper Battery Charging
Another 2.3kWh on the horizon - ground mount+575's
Re: Panels overheating or simply not suited for hot weather?
Ha ha! Your roof looks like mine! My next-door neighbour has a perfect, rectangular, SSE-facing, roof that is completely unadorned. I recon he’d get 8kWp up there in a single elegant array.Tay wrote: ↑Sat Sep 30, 2023 11:11 pmnowty wrote: ↑Sat Sep 30, 2023 12:05 pm You only had to read the single post I linked from the 45 pages.
https://camelot-forum.co.uk/phpBB3/view ... 9562#p9562
The science behind the parallel strings into a single MPPT in case your interested.
https://docplayer.net/1067023-Efficient ... acker.html
I found that with a global peak algorithm my SMA inverters do, some shading could also be accommodated. There are losses but they are small, and running a global peak algorithm when its not needed also loses a bit too. The decent inverters allow you to turn it on or off and change the scanning interval.
Alas, the E facing is a non starter ^^ - swmbo wont have it.
West + W look like I could get away with a single string and S1 seems fine as another, but S2 would just not worth it I suspect..especially for a single panel..my exposure with shading hasnt been good thus far.
The easy way to make the best of a roof like yours is to whack them all in one string and put Tigo Optomisers on the back of each panel (you can even get “Smart panels” that have Tigos built in.
12x 340W JA Solar panels (4.08kWp)
3x 380W JA Solar panels (1.14kWp)
5x 2.4kWh Pylontech batteries (12kWh)
LuxPower inverter/charger
(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
3x 380W JA Solar panels (1.14kWp)
5x 2.4kWh Pylontech batteries (12kWh)
LuxPower inverter/charger
(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
Re: Panels overheating or simply not suited for hot weather?
In which you wrote And as even with heavy shading, as long as 3 out of the 5 ladder store panels are in full sun my SMA shade management function works nicely, drops the voltage from around 200v down to 130v and keeps the full string current without any panel optimisers.nowty wrote: ↑Sat Sep 30, 2023 12:05 pm You only had to read the single post I linked from the 45 pages.
https://camelot-forum.co.uk/phpBB3/view ... 9562#p9562
bit too. The decent inverters allow you to turn it on or off and change the scanning interval.
AIU this the lower voltage from the part-shaded array pulls the other one down even if it is not shaded.
The same current from the unshaded array and 70V lower voltage equates - to first order - to 35% of its power foregone compared with two separate MPPTs. (Actually the operating point moves to the left so the current will increase slightly, but as the graph is fairly flat here this effect will small.)
Last edited by sharpener on Sun Oct 01, 2023 10:41 am, edited 2 times in total.
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Victron MultiPlus II-GX 48/5000/70-50 with 250/60 MPPT
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Villavent whole-house MVHR
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8 x 405W Longi panels, 3.355 MWh/yr projected
Victron MultiPlus II-GX 48/5000/70-50 with 250/60 MPPT
3 x Pylontec 3.55 kWh Force-L2
zappi 7kW EV charger
Villavent whole-house MVHR
5000l rainwater system
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Re: Panels overheating or simply not suited for hot weather?
...or bend the 200mm rule and have and upstand on the W roof to keep the string in one plane
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16 Sharp PV panels facing WSW 4kW
Solarmax 4200S inverter
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3 Canadian solar DC coupled 1.75kW facing SSE
Storage
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FIT
16 Sharp PV panels facing WSW 4kW
Solarmax 4200S inverter
Non FIT
3 Canadian solar DC coupled 1.75kW facing SSE
Storage
Growatt SPA3000TL BL inverter ac coupled
Growatt GBLI6532 6.5kWh lithium phosphate battery
Re: Panels overheating or simply not suited for hot weather?
Yeah dont started me on the roof.. although this one is starting to gather momentum..it might cost me a trip to Skiathos next year without me but 40/60 so far...but up from "No f***** way" several weeks back - so thats almost a yes in my book..the shrubs are just that, nothing special, I might stuggle to go further West into the Camelia and wild roses though ^^Stinsy wrote: ↑Sun Oct 01, 2023 8:34 amHa ha! Your roof looks like mine! My next-door neighbour has a perfect, rectangular, SSE-facing, roof that is completely unadorned. I recon he’d get 8kWp up there in a single elegant array.Tay wrote: ↑Sat Sep 30, 2023 11:11 pmnowty wrote: ↑Sat Sep 30, 2023 12:05 pm You only had to read the single post I linked from the 45 pages.
https://camelot-forum.co.uk/phpBB3/view ... 9562#p9562
The science behind the parallel strings into a single MPPT in case your interested.
https://docplayer.net/1067023-Efficient ... acker.html
I found that with a global peak algorithm my SMA inverters do, some shading could also be accommodated. There are losses but they are small, and running a global peak algorithm when its not needed also loses a bit too. The decent inverters allow you to turn it on or off and change the scanning interval.
Alas, the E facing is a non starter ^^ - swmbo wont have it.
West + W look like I could get away with a single string and S1 seems fine as another, but S2 would just not worth it I suspect..especially for a single panel..my exposure with shading hasnt been good thus far.
The easy way to make the best of a roof like yours is to whack them all in one string and put Tigo Optomisers on the back of each panel (you can even get “Smart panels” that have Tigos built in.
A drone shot from last year, alas, my neighbour (lower house) now has 8 panels on the south and 3 west facing..but he was nice enough to let me get some shots of my flat roof and inspect my roof whilst his was being done..I was drooling though..
PV 1.1kWh
Victron Multiplus 8K II 48v/100A + Victron 150/35 charge controller + lynx 1000
CerboGX, 25kW Pylontech batteries
Octopus Agile - Cheaper Battery Charging
Another 2.3kWh on the horizon - ground mount+575's
Victron Multiplus 8K II 48v/100A + Victron 150/35 charge controller + lynx 1000
CerboGX, 25kW Pylontech batteries
Octopus Agile - Cheaper Battery Charging
Another 2.3kWh on the horizon - ground mount+575's
Re: Panels overheating or simply not suited for hot weather?
You can see my house on the left with the panels, note the 2x neighbours with much more suitable roofs, completely unadorned!
12x 340W JA Solar panels (4.08kWp)
3x 380W JA Solar panels (1.14kWp)
5x 2.4kWh Pylontech batteries (12kWh)
LuxPower inverter/charger
(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
3x 380W JA Solar panels (1.14kWp)
5x 2.4kWh Pylontech batteries (12kWh)
LuxPower inverter/charger
(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
Re: Panels overheating or simply not suited for hot weather?
This is looking to be the most popular, although I still feel that there are 2 definitive strings there with the E and W facing. The possible northern fence is a bit pie in the sky right now, but if I pester the one who must be obeyed enough it might become reality, I'm keeping the shoots under control right now so its doesnt fill in t too much and wont be missed ^^.openspaceman wrote: ↑Sun Oct 01, 2023 10:34 am...or bend the 200mm rule and have and upstand on the W roof to keep the string in one plane
PV 1.1kWh
Victron Multiplus 8K II 48v/100A + Victron 150/35 charge controller + lynx 1000
CerboGX, 25kW Pylontech batteries
Octopus Agile - Cheaper Battery Charging
Another 2.3kWh on the horizon - ground mount+575's
Victron Multiplus 8K II 48v/100A + Victron 150/35 charge controller + lynx 1000
CerboGX, 25kW Pylontech batteries
Octopus Agile - Cheaper Battery Charging
Another 2.3kWh on the horizon - ground mount+575's
Re: Panels overheating or simply not suited for hot weather?
Its gut wrenching isnt it
PV 1.1kWh
Victron Multiplus 8K II 48v/100A + Victron 150/35 charge controller + lynx 1000
CerboGX, 25kW Pylontech batteries
Octopus Agile - Cheaper Battery Charging
Another 2.3kWh on the horizon - ground mount+575's
Victron Multiplus 8K II 48v/100A + Victron 150/35 charge controller + lynx 1000
CerboGX, 25kW Pylontech batteries
Octopus Agile - Cheaper Battery Charging
Another 2.3kWh on the horizon - ground mount+575's
Re: Panels overheating or simply not suited for hot weather?
Those neighbours haven't been fooled by that green/renewables nonsense!
3.87kWp PV
10.24kWp PV SolarEdge system
Tesla Powerwall 2
100 x 47mm Navitron tubes (still being installed!) Now likely to be removed for more PV.
MK2 PV router DHW diverter
Morso 5kW WBS
Vaillant AroTherm 10kW ASHP
Nissan Leaf
10.24kWp PV SolarEdge system
Tesla Powerwall 2
100 x 47mm Navitron tubes (still being installed!) Now likely to be removed for more PV.
MK2 PV router DHW diverter
Morso 5kW WBS
Vaillant AroTherm 10kW ASHP
Nissan Leaf