Second system extension extension.

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nowty
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Re: Second system extension extension.

#11

Post by nowty »

Joeboy wrote: Thu Sep 16, 2021 7:02 pm Would I be right in saying that the 4th string in parallel would not pull down the other 3 strings due to it (the 4th string) being early mornings Winter shaded(leylandi to East of panels)?

My hope is that the other 3 strings will output to their max as conditions dictate and the 4th deck string will come 'online' once voltage from it is high enough to push into the JB where the other three more favoured strings will already be outputting?
Your right, a shaded parallel string will not bring down other sunny parallel strings.
16.9kW PV > 109MWh generated
Ripple 6.6kW Wind + 4.5kW PV > 25MWh generated
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Stinsy
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Re: Second system extension extension.

#12

Post by Stinsy »

Joeboy wrote: Thu Sep 16, 2021 7:02 pm Would I be right in saying that the 4th string in parallel would not pull down the other 3 strings due to it (the 4th string) being early mornings Winter shaded(leylandi to East of panels)?

My hope is that the other 3 strings will output to their max as conditions dictate and the 4th deck string will come 'online' once voltage from it is high enough to push into the JB where the other three more favoured strings will already be outputting?
Correct. Parallel strings cannot bring down anything. It is only series panels that affect eachother. The purpose of the 4th string is to help out in overcast diffused lighting conditions so shading is less of an issue.
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(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
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Joeboy
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Re: Second system extension extension.

#13

Post by Joeboy »

Thanks Lads, Always worth checking! This recent power cost increase certainly draws into focus the benefit of being as self sufficient as possible, especially in the shoulder months. Being realistic i'll see maybe 4 hours output from the 4th string. That's ok though, it's to the good.
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Stinsy
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Re: Second system extension extension.

#14

Post by Stinsy »

Panels are cheap. It’s the installation and the other bits that cost the money. If you have the space, can make the mount yourself, and already have something to connect the panels too, it’s a no-brainier.
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.)
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Joeboy
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Re: Second system extension extension.

#15

Post by Joeboy »

Stinsy wrote: Thu Sep 16, 2021 8:15 pm Panels are cheap. It’s the installation and the other bits that cost the money. If you have the space, can make the mount yourself, and already have something to connect the panels too, it’s a no-brainier.
Aye, you are indeed on the ball, thank you. I have in some ways in this new life of retirement been struck by lazyitis. I am waiting to see what the new traffic lights are tomorrow and will leap into action thereafter on 2 fronts (fat ass on a lounger & fat solar in the can). Hopefully get string 4 in place soon.
19.7kW PV SE, VI, HM, EN & DW
Ripple 7kW WT & Gen to date 19MWh
42kWh LFPO4 storage
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12kWh 210ltr HWT.
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Zoned GCH & Hive 2
WBSx2
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Joeboy
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Re: Second system extension extension.

#16

Post by Joeboy »

Some day, Turkey off the red list so heading out to Turkish hoose and bought 960W of string 4 loveliness for Scotland hoose. An outstanding Friday! :D

Went with Trade Sparky website for the purchase.
Last edited by Joeboy on Sat Sep 18, 2021 11:48 am, edited 1 time in total.
19.7kW PV SE, VI, HM, EN & DW
Ripple 7kW WT & Gen to date 19MWh
42kWh LFPO4 storage
95kWh Heater storage
12kWh 210ltr HWT.
73kWh HI5
Deep insulation, air leak ct'd home
Zoned GCH & Hive 2
WBSx2
Low energy bulbs
Veg patches & fruit trees
Bugtownboy
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Re: Second system extension extension.

#17

Post by Bugtownboy »

A man needs a project (or three) otherwise he’ll get up to all sorts of daft ventures ;)
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Joeboy
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Re: Second system extension extension.

#18

Post by Joeboy »

Bugtownboy wrote: Fri Sep 17, 2021 6:36 pm A man needs a project (or three) otherwise he’ll get up to all sorts of daft ventures ;)
Aye, that we do. :lol: I am thinking i'll build a wooden frame so I can have the frame on rear deck Wintertime and move and plug in again in Veg patch2 for the main season. Might make up a quick connect IP rated jumper box at the same time' if i can hunt down a couple of bulkhead mount MC4 connectors. Will take away the polarity issue in the following years.

SWMBO said 'No way you'll store this post Winter'. That lassie knows me! :roll:
19.7kW PV SE, VI, HM, EN & DW
Ripple 7kW WT & Gen to date 19MWh
42kWh LFPO4 storage
95kWh Heater storage
12kWh 210ltr HWT.
73kWh HI5
Deep insulation, air leak ct'd home
Zoned GCH & Hive 2
WBSx2
Low energy bulbs
Veg patches & fruit trees
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nowty
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Re: Second system extension extension.

#19

Post by nowty »

Joeboy wrote: Sat Sep 18, 2021 9:27 am
I am thinking i'll build a wooden frame so I can have the frame on rear deck Wintertime and move and plug in again in Veg patch2 for the main season. Might make up a quick connect IP rated jumper box at the same time' if i can hunt down a couple of bulkhead mount MC4 connectors. Will take away the polarity issue in the following years.

SWMBO said 'No way you'll store this post Winter'. That lassie knows me! :roll:
Well there are temporary panels and temporary panels !

I do have 4 definite temporary panels, but these two shown below were temporary panels and were fitted slightly differently when they were temporary. But I only lost a bit of decking area by making them permanent, I screwed down a simple wooden frame through the decking joists for the bottom and they rest on another chamfered bit of wood at the top and are cable tied to hooks underneath so they wont move even in a storm.

The use of TIGOs has made all sorts of weird and wonderful string configurations possible.

Image
Last edited by nowty on Sat Sep 18, 2021 4:17 pm, edited 1 time in total.
16.9kW PV > 109MWh generated
Ripple 6.6kW Wind + 4.5kW PV > 25MWh generated
5 Other RE Coop's
105kWh EV storage
60kWh Home battery storage
40kWh Thermal storage
GSHP + A2A HP's
Rain water use > 510 m3
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Joeboy
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Location: Inverurie

Re: Second system extension extension.

#20

Post by Joeboy »

That is pretty good for a minimal impact ground mount. Impressed. It will after Turkey trip for my install. I am a fan of less is more but will mount going on the direction of the scrap wood pile. :)
19.7kW PV SE, VI, HM, EN & DW
Ripple 7kW WT & Gen to date 19MWh
42kWh LFPO4 storage
95kWh Heater storage
12kWh 210ltr HWT.
73kWh HI5
Deep insulation, air leak ct'd home
Zoned GCH & Hive 2
WBSx2
Low energy bulbs
Veg patches & fruit trees
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