Generator or Inverter for residential use?

[Neuk_]

Sorry 50A I'll chat to Colin then, there has been no additional setup other than plugging everything in and connecting to the DB.

The reading I have been doing points to the inverter being setup with a too low amperage setting for 'shore' power which I can only presume is the same as mains power. Can you see what yours is set to?

 

[Sinbad]

The reading I have been doing points to the inverter being setup with a too low amperage setting for 'shore' power which I can only presume is the same as mains power. Can you see what yours is set to?

63A, which is the size of my main breaker, and the cabling into and out of the inverter supports this amperage.

 

[cfvh600]

nice! now we can have short neat cables.

Not cheap!

https://za.rs-online.com/web/p/elec...0GWrjUdF9bnaNR8WKmgaAgtKEALw_wcB&gclsrc=aw.ds

 

[wingnut771]

Not cheap!

https://za.rs-online.com/web/p/elec...0GWrjUdF9bnaNR8WKmgaAgtKEALw_wcB&gclsrc=aw.ds

long cables it is then although i think rs are rip off artists.

 

[TheChamp]

Not cheap!

https://za.rs-online.com/web/p/elec...0GWrjUdF9bnaNR8WKmgaAgtKEALw_wcB&gclsrc=aw.ds

Now ready-made cables don't look so bad.

 

[Sinbad]

Battery cables AS SHORT AS POSSIBLE guys. These are high-current DC applications.

 

[cfvh600]

long cables it is then although i think rs are rip off artists.

Yeah RS is expensive.

 

[wingnut771]

the battery can only supply 100A, so have 2 batteries with normal cable to busbar making them parallel, then thick cable from there with 240A fuse.

this is for 8kw inverter, don't think you need to parallel for 5kw. 100A times 48V is 4800W.

 

[wingnut771]

Battery cables AS SHORT AS POSSIBLE guys. These are high-current DC applications.

i mean the supplied "long" pylontech cable, which i think is 2m.

 

[wingnut771]

Battery cables AS SHORT AS POSSIBLE guys. These are high-current DC applications.

Pylontech Battery Cable Kit 2m

Pylontech battery cable accessory kit for use with Pylontech batteries. You will need one cable kit per bank of batteries

www.inverter-warehouse.co.za

PylonTech Cable Pack for US2000B and Phantom-S Batteries

The PylonTech Cable Pack for US2000B and Phantom-S Batteries is a Pylon battery cable accessory kit for use with the US2000B, US2000B Plus and Phantom-S

zerohomebills.com

 

[Saba'a]

From the Sunsynk Technical Support Forums:

https://www.sunsynk.org/forum/techi...8kw-if-not-then-how-is-the-delay-best-handled

See the diagram below where the earth bond relay is shown connected to the inverter, not sure if you need it.


View attachment 883040

Thanks. Got a lot of info from other owner.

Nice video as well on site.


He stated:

[07/28, 20:12] : It is regulation. Theoretically a coc cannot be issued without it.
[07/28, 20:13] And your earth leakage may not work properly. And also your earth wires in backup mode can carry some current. I got a light shock from mine before installing this relay.

 

[Saba'a]

Their assuming that you will at times be drawing the maximum current, no need to worry about that for now due to your smaller inverter, you can either wire it right so that you don't worry about it when you upgrade the inverter or just do it adequately for your current requirements, your choice.

Huh smaller? I have a 8.8KV Sunsynk?

 

[wingnut771]

this is for 8kw inverter, don't think you need to parallel for 5kw. 100A times 48V is 4800W.

then again, for continuous draw, better to parallel, as 100A is only 15 seconds.

 

[Saba'a]

Post #1724, single cable.

Was referring to fact you stated pylontech requires double cables for inverter larger than 5KV.

So getting confused by reference to more batteries then busbar used.

So double cabling for if batteries exceed 5KV in total or inverter exceeds 5KV?

Sorry man but I know absolutely zilch.

 

[Saba'a]

Post #1724, single cable.

Was referring to fact you stated pylontech requires double cables for inverter larger than 5KV.

So getting confused by reference to more batteries then busbar used.

So double cabling for if batteries exceed 5KV in total or inverter exceeds 5KV?

Sorry man but I know absolutely zilch.

 

[TheChamp]

Was referring to fact you stated pylontech requires double cables for inverter larger than 5KV.

So getting confused by reference to more batteries then busbar used.

So double cabling for if batteries exceed 5KV in total or inverter exceeds 5KV?

Sorry man but I know absolutely zilch.

I am officially confused I could have sworn I saw some 5000 somewhere there and assumed 5kW inverter. It makes sense why they recommend a 200A fuse, an 8000W inverter at full load is 166A. You can pull up to a max of 100A per battery, two batteries in parallel can give you 200A.

That's where you need double cabling because one cable is rated for only 120A, double them, connect to a bus, put a 200A fuse and that's it. Or do it in any other way that satisfies the current requirements for the full load at 8000W.

Stay with the principle of current ratings and you won't be confused, the more current you draw, the bigger the fuse and cables, you can use the single cable on the 8000W inverter as long as you don't pull too much current you will be fine. So it's not about the inverter or batteries it's about the current you want to draw on any system.

 

[Saba'a]

I am officially confused I could have sworn I saw some 5000 somewhere there and assumed 5kW inverter. It makes sense why they recommend a 200A fuse, an 8000W inverter at full load is 166A. You can pull up to a max of 100A per battery, two batteries in parallel can give you 200A.

That's where you need double cabling because one cable is rated for only 120A, double them, connect to a bus, put a 200A fuse and that's it. Or do it in any other way that satisfies the current requirements for the full load at 8000W.

Stay with the principle of current ratings and you won't be confused, the more current you draw, the bigger the fuse and cables, you can use the single cable on the 8000W inverter as long as you don't pull too much current you will be fine. So it's not about the inverter or batteries it's about the current you want to draw on any system.

Okay

Signates has a 8.8kv

Other owner whose pics of relay I posted has a 5.5KV

I bought a 5kv kodak originally, then thought a 5.5 Sunsynk but at R22 000 figured might just as well pay R29 000 (w.o wifi module) for 8.8kv sunsynk.

So guess can cause confusion plus I dont know what goes

 

[TheChamp]

Seems below wasnt answered?

I ordering two usb3000 with a Victron multiplus II 5000 (aiming to get 4 total). Manual recommends 200a fuses. Means a big jump to larger disconnect from 125a fuse on the multi 3000 model. Cables then seem undersized??
Can one put on thicker cables with existing lugs or get new ones

What is a Victron multiplus II 5000?

 

[Saba'a]

I am officially confused I could have sworn I saw some 5000 somewhere there and assumed 5kW inverter. It makes sense why they recommend a 200A fuse, an 8000W inverter at full load is 166A. You can pull up to a max of 100A per battery, two batteries in parallel can give you 200A.

That's where you need double cabling because one cable is rated for only 120A, double them, connect to a bus, put a 200A fuse and that's it. Or do it in any other way that satisfies the current requirements for the full load at 8000W.

Stay with the principle of current ratings and you won't be confused, the more current you draw, the bigger the fuse and cables, you can use the single cable on the 8000W inverter as long as you don't pull too much current you will be fine. So it's not about the inverter or batteries it's about the current you want to draw on any system.

So busbar then recommended? I only have 2 pylontech us 3000 3.5kw batteries.

But will add some after PV panels, hopefully next year.

 

[Saba'a]

What is a Victron multiplus II 5000?

This was from powerforum link. Seems person question wasnt answered about size of cables?

Issue was double cabling for larger than 5KV vs Sunsynk recomending 50mm cables for 8KV sunsynk while 5KV requires 35mm cables to inverter.

I assume you use busbar and thus need one 50mm cable to inverter.