Second system extension extension.

[Stan]

I still wonder how Nowty got his feet in that photo. Could it be the last moments of a skydive, or on a cable car or just hanging off the edge of a cliff?
Joeboy, well done for getting stuck in so quick. Trouble is I can’t work out what everything is or does at this stage. I did spot the mobile phone receiver under the left inverter.....oh and the axe.

[Joeboy]

I still wonder how Nowty got his feet in that photo. Could it be the last moments of a skydive, or on a cable car or just hanging off the edge of a cliff?
Joeboy, well done for getting stuck in so quick. Trouble is I can’t work out what everything is or does at this stage. I did spot the mobile phone receiver under the left inverter.....oh and the axe.

A bit of vertigo for me in that position!

Top left is bottom of battery stack, big beige box is the solar edge inverter for main array,
Blue box is charge controller (new) to cope with increased power output of 2nd array next Spring. It just simply chuck power into the batteries until they are full and then switches itself off.
Yellow box is a hybrid inverter which controls power flows to and from the battery stack and grid. It also sees the power coming in from the Solaredge system and distributes it accordingly.
Theres a small grey box middlish its the counter for the FIT.
Another grey box below the yellow box houses fuses for 2nd array and a gauge for quick reference of 2nd array output.
The rest is iso switches and a Keno fusebox.
The axe is for chopping kindling and also a tool I will use to let SWMBO get a head start when the Zombies arrive.

[nowty]

I still wonder how Nowty got his feet in that photo. Could it be the last moments of a skydive, or on a cable car or just hanging off the edge of a cliff?

Its paragliding, a relatively low carbon pursuit, using wind and solar hot air to stay up.
Pics below give you an idea.

[Joeboy]

Well the Victron 150/60 is working away as is the newest string. Hopefully see a few more kWh's once the leaves fall and sun can reach past the trees!

A bonus today, FIT payment arrived which was earmarked to go towards paying back the cost to account for the new Victron unit. I like the circular nature of that event. The resale of original unit counts too and that piece of kit is onwards and upwards to Stinsy.

[nowty]

Well the Victron 150/60 is working away as is the newest string. Hopefully see a few more kWh's once the leaves fall and sun can reach past the trees!

A bonus today, FIT payment arrived which was earmarked to go towards paying back the cost to account for the new Victron unit. I like the circular nature of that event. The resale of original unit counts too and that piece of kit is onwards and upwards to Stinsy.

Apart from recouping some dosh, its very satisfying to know that the stuff is getting another life.

To date I have sold on my surplus solar / renewable kit to the following countries,

England
Scotland
Northern Ireland
France
Germany
Greece
Portugal
Latvia

[Joeboy]

Well the Victron 150/60 is working away as is the newest string. Hopefully see a few more kWh's once the leaves fall and sun can reach past the trees!

A bonus today, FIT payment arrived which was earmarked to go towards paying back the cost to account for the new Victron unit. I like the circular nature of that event. The resale of original unit counts too and that piece of kit is onwards and upwards to Stinsy.

Apart from recouping some dosh, its very satisfying to know that the stuff is getting another life.

To date I have sold on my surplus solar / renewable kit to the following countries,

England
Scotland
Northern Ireland
France
Germany
Greece
Portugal
Latvia

Brilliant to think it's all out there working away for the new owners. I try to buy 2nd hand whenever I can. Used to be for price but now I think of the embedded energy first and price second.

[Joeboy]

So both my predictions came true then.

From memory, you were at the limit with those blade fuses, I recommend you upgrade to forklift fuses.

https://uk.rs-online.com/web/p/products/3809923/

https://uk.rs-online.com/web/p/car-fuses/7874404/

TBH, I can't remember what we went up to last time in the Keto. The top end is at 165A for those fuses in that unit I think. Likely we fitted 125A fuses?
My Tuborg addled mind tells me that (9000W/100×85)/48V=159A. I will be knocking 5A off on the Victron to align with the 4mm cable 55A max on the 2nd system cable run to garage. Call it 155A max if I can squeeze 85% out of both systems at the same time. It's close and as the PV is facing in so many directions its unlikely I'll see 90% of whole at any single point. I think I'm game to fit the 165A fuses and see how it plays out? Open to All advice!
P.S Absolutely correct, how could I not?

No, I'm talking about the 32A Bussman fuses from the Victron Charge Controller as thats as high as they go.

And I also meant a higher than 60A fuse such as, https://uk.rs-online.com/web/p/car-fuses/2260872/

But the fuse base is still correct https://uk.rs-online.com/web/p/products/3809923/

The Keto is for your GoodWe or you could use another Keto if you have the space.

Your fuses for the Victron output were / are these (that's your photo !).

Fingers poised over order button for the 80A fuses and holders to cover the upgrade to a 60A unit on the Victron side of the system.

Had a thought and I am wide open to ridicule here. The Keto fuse box on the system has 80A fuses onboard. One side of this fusebox has the incoming leads from the Goodwe Unit, thru the fuses and on the other side of the fuses the Victron unit T's in then leads run to the Pylontech stack.

My question to the the hive mind is this- as both the Goodwe & Victron units switch off their individual PV arrays depending on the Pylontech stack voltage does this mean that I am ok with the 80A fuses in the Keto fuse box and there can't be a backflow into the Goodwe side of the keto fuse box? I guess I am thinking of response times of the units (GoodWe & Victron). Does that make any sense? I don't want to fit 160A fuses into the Keto if I don't have to and i'm thinking I don't have to?

[nowty]

My question to the the hive mind is this- as both the Goodwe & Victron units switch off their individual PV arrays depending on the Pylontech stack voltage does this mean that I am ok with the 80A fuses in the Keto fuse box and there can't be a backflow into the Goodwe side of the keto fuse box? I guess I am thinking of response times of the units (GoodWe & Victron). Does that make any sense? I don't want to fit 160A fuses into the Keto if I don't have to and i'm thinking I don't have to?

Jeeze Joyboy, my head is spinning from too much indulgence over the Xmas period !, having to have an extended think and an early glass of red to help.

OK, the current Keto 80A fuse box you have is for the Goodwe and it stays as is, the Goodwe wont accept any more current from either the Victron or the Pylontech battery stack so just leave as is.

You only need to replace the Bussman blade fuses from your new Victron Charge Controller unless you limit the max current from it. You could use another Keto unit (rather than the forklift fuses) to make both fuse boxes similar and may give you an advantage of also being used as an isolator (I think).

BUT unless you limit the current from the new Victron Charge Controller your going to run into another problem we spoke about before where the cables to your Plyontech stack and their interconnector cables wont take the current. Post 89 from this thread, linked below,
https://camelot-forum.co.uk/phpBB3/view ... t=80#p3217

Also, if you go down the road of a parallel battery stack, I failed to mention in post 89 that you need another set of fuses, say 100A or 120A from the DC distribution point to each battery stack. You can actually see them in the photo from the positive DC distribution point although you only need two, one to each Pylontech stack as the other two shown are redundant as your feeds already come from fused units. I understand that your whole physical topology may have to change to accomplish this.




My other WARNING is if you are going to make a DC distribution point, either,

1) Have the positive and negative well away from each other to avoid any risk of dropping a metallic tool on them and accidently short circuiting them.

Or

2) Make it impossible for a flat metallic tool to cause a short circuit like one of mine with a wooden block separator, shown below.

[Joeboy]

Cheers Nowty.Ive just been out for a roll of insulation and whole driving thought of water flowing and its great to have it confirmed. Space and cabling is getting tight. I am going to.go with the forklift type and a pair of 80A fuses for the moment. The temperature of the cables I'm going to suck it and see. Luckily I can easily tweak the Amp flow with the app and monitor with the thermal gun. In this instance the East/West split of the 5.12kW array works for us as it very rarely gets up to 4.8kW and that's for short bursts only. Will see how the multiple angles of panels work together and what they throw off in May. Any idea what sort of Temps on the cables to commence bricking it? Will keep the120A and 70 deg in my mind.

BTW, thanks for decoding my gibberish, on the wine too, excellent!

For busbar route I'd likely add a perspex plate across the top. And screw it into the wooden sep card.

[Joeboy]

I went with these guys for the components. A bet less costly than RS. In saying that, £70 for two fuses & carriers!

In saying that, looking forward to seeing what it can do in Spring.

https://www.enrgtech.co.uk/