High Voltage Solar Panels

itareanlnotani said:
Even with a correction factor of 0.6, I still get 9KW.

OP's talking about a garden shed close to his flat, distance is going to be 10-20 meters at most, we're not talking a long distance.
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have you measured it ?what temp will the cable run at ?does the sun heat it?
 
itareanlnotani said:
Have you? I don't need to get into a pissing match with you here.
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the max you can go on a 10mm cable is table 8 which is around 64 amps with no correction factor ,if you multiply a 0.6 factor you will get around 8.5 kw max .i would still rather work on table 5 at 55 amps it also depends on what cable is used
 
The idea on the cable will be to have it buried, entry will be at floor level into the kitchen, and from there routed internally to the panel, will be in trunking. So exposure to sunlight will be minimal, I wil also have the exposed exterior runs in bosal, even though it is armoured. Yes overkill, but the slight extra cost/effort is worth it.


As some mentioned, a 10mm cable might be overkill, but if you take that 5kw inverters can spike to 10kw for short bursts I would rather have a bigger cable.

And yes, this forum is for advice only, I always confirm everything with my electrician. Who will trust a group of strangers on the internet :) .
 
Kroks said:
The idea on the cable will be to have it buried, entry will be at floor level into the kitchen, and from there routed internally to the panel, will be in trunking. So exposure to sunlight will be minimal, I wil also have the exposed exterior runs in bosal, even though it is armoured. Yes overkill, but the slight extra cost/effort is worth it.


As some mentioned, a 10mm cable might be overkill, but if you take that 5kw inverters can spike to 10kw for short bursts I would rather have a bigger cable.

And yes, this forum is for advice only, I always confirm everything with my electrician. Who will trust a group of strangers on the internet :) .
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you can rather go big than regret it .you may not use 55amp (yet)but i can see that 8kw unit peeking out of the corner .
 
Kroks said:
The idea on the cable will be to have it buried, entry will be at floor level into the kitchen, and from there routed internally to the panel, will be in trunking. So exposure to sunlight will be minimal, I wil also have the exposed exterior runs in bosal, even though it is armoured. Yes overkill, but the slight extra cost/effort is worth it.


As some mentioned, a 10mm cable might be overkill, but if you take that 5kw inverters can spike to 10kw for short bursts I would rather have a bigger cable.

And yes, this forum is for advice only, I always confirm everything with my electrician. Who will trust a group of strangers on the internet :) .
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Maybe if you go Victron, but the Sunsynks won't, they'll just trip.
You also need to remember the C rating for the batteries - at C1, they'll give you rated capacity. Drawing more than C rating for short periods will potentially lose your warranty on the Hubbles.

https://www.hubblelithium.co.za/_files/ugd/49fdd5_5ba8e2da490f4d498ca25d42391b66b2.pdf Point 12.

If 1 x 5KW 1C rated battery, you'll only be able to draw close to 4.5KW out + whatever the inverter will need + its losses so likely around 4KW usable.
With 2 x 1C batteries on a common bus, that will roughly double.

For a 5KW inverter, 1 x 1C 5KW battery will be ok (or more). With an 8KW unit, you really need two, especially as you don't have excess PV to cater for any differences.

The newer Hubbles eg the https://www.hubblelithium.co.za/am-10 are 0.75C so be careful sizing.

Just a heads up.
 
RonSwanson said:
So I like the idea of the ground mounted panels as suggested by @TheChamp . All that you have to do to fool the trustees is to make it look like a shed. So design a structure that 1) points your panels where you want them and 2) has walls covered with IBR (and even a fake door). They won't know the difference.

You are very lucky to have a garden unit, think of all the poor fsckrs without :confused:
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I am thinking of building a portable frame I wheel out in the mornings and store in Garage in afternoons. Yard not big enough for another temp structure. Winter I might still have a problem
 
RedViking said:
I am thinking of building a portable frame I wheel out in the mornings and store in Garage in afternoons. Yard not big enough for another temp structure. Winter I might still have a problem
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Just make sure that the panel frames are earthed.
 
[QUOTE="Kroks, post


As some mentioned, a 10mm cable might be overkill, but if you take that 5kw inverters can spike to 10kw for short bursts I would rather have a bigger cable.

your electrician will work out the max that the system can generate ,if that is 10kw then the cable must be suitable .no average can be taken into consideration ,whether you use 1 kw at a time makes no difference to the regulations and your CoC must be done by a qualified IE .an electrician cannot certify the work as compliant .
 
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