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Posted

Hi I did installed a kodak 7.2kw inverter 16 450w Canadian solar panels 2 x 48vdc 200ah 10000wh (10kw) all settings is on Default still. On Google I can't find the spesific settings to make my system operating without me have to select braker swith  between utility and solar.Timer settings for output source priority and charger source priority is unknown to setup. Can someone pls assist me 

Posted
1 hour ago, Steve87 said:

Hi Wurm,

What batteries do you have ? Will affect the settings suggested.

 

 

Posted

Great stuff,

The Narada lithium batteries are not supported by the Voltronics Max. However, this is not a show stopper, you can run them under "USER" defined settings and I would suggest you run something like Solar assistant on such a setup. 

I will forward you some appropriate settings later today. 

 

Posted
1 hour ago, Steve87 said:

Great stuff,

The Narada lithium batteries are not supported by the Voltronics Max. However, this is not a show stopper, you can run them under "USER" defined settings and I would suggest you run something like Solar assistant on such a setup. 

I will forward you some appropriate settings later today. 

 

Thanks I appreciate the system is running on USER in program 01 / I have 3 priority choices I set it now for SbU first solar priority then batery priority setting voltage point back to utility 46v as in program 12 stated bud it is not doing it and then shut down totally off have to restart it.Also I don't know how to set the timers for output source priority and charger source priority. 

Posted
On 2022/04/27 at 9:07 PM, Wurm said:

without me have to select braker swith  between utility and solar.

Can you give a little more detail there, please? It makes no sense to me. Utility is AC, solar is DC.

Posted
4 hours ago, Wurm said:

What is solar assist

it's a monitoring program that runs on a Raspberry Pi. It's additional hardware and cost. Google it.

Posted
On 2022/04/28 at 8:11 PM, Wurm said:

setting voltage point back to utility 46v as in program 12 stated bud it is not doing it

46 V is low, probably low enough that it is interfering with the low DC cutoff voltage. See FAQ 2.

These are the (arguably) forum-agreed values for LFP via USER. NOTE: these assume a 15S battery; some are 16S.

image.png

Posted
4 hours ago, Coulomb said:

Can you give a little more detail there, please? It makes no sense to me. Utility is AC, solar is DC.

Yes the installer fit 2 switches one to switch between Utility (AC) and DC(inverter)both the switches can go in line mode or bypass If this switch is on DC (inverter) and the ather switch is on it stays on bypass until switches off then I have the freedom of solar or batery power when sun go down batery take over until it goes shut down if batery gets to 46v as set it never change to Ac To bypass and charge batery until sun is up again activates the solar.It doesn't seems correct to me.

Posted

My notes say that Narada are 15S (it's hard to find that information), so use the figures in my table. Sorry for all the crossing out. Default values will be damaging for your battery. For maximum charge current, use 80 A (or whatever is the maximum your inverter will allow).

In particular, setting 12 going to 48 V will save your battery modules from excessive discharge, or disconnection by the internal BMS.

You should not have to manually switch over.

Posted
21 hours ago, Coulomb said:

46 V is low, probably low enough that it is interfering with the low DC cutoff voltage. See FAQ 2.

These are the (arguably) forum-agreed values for LFP via USER. NOTE: these assume a 15S battery; some are 16S.

image.png

Hi I installed this settings  but it changed over to line mode bypass at 48v as in program 12 and stay there an consuming Eskom power it even ignore the pv input as priority 🤔

Posted

Hi Coulomb I set my system again change  program 12 to 46v and program 29 to 44v to keep the 2v divrence  and program 13 at 50v I also set the Timer settings for output source priority and tor charger source priority on all operations to start time 23 and end time 23 hope it is fine because 00 /23 don't sound correct 😂so far it go well😉Anather question I saw the installer did not the fuse and the surge protector in the DB boks is that important.Thanx

Posted
1 minute ago, Wurm said:

Hi Coulomb I set my system again change  program 12 to 46v and program 29 to 44v to keep the 2v divrence  and program 13 at 50v I also set the Timer settings for output source priority and tor charger source priority on all operations to start time 23 and end time 23 hope it is fine because 00 /23 don't sound correct 😂so far it go well😉Anather question I saw the installer did not the fuse and the surge protector in the DB boks is that important.Thanx

 

20220501_104953.jpg

20220501_104907.jpg

Posted
3 hours ago, Wurm said:

I also set the Timer settings for output source priority and tor charger source priority on all operations to start time 23 and end time 23 hope it is fine because 00 /23 don't sound correct

My understanding is that 23 and 23 means start at the start of hour 23 and end at the end of hour 23. In other words, it applies only from 11pm to midnight. I suspect that's not what you wanted.

0 and 23 would mean all day, as I understand it (starting at the start of hour 0 and ending at the end of hour 23).

Posted
3 hours ago, Wurm said:

I saw the installer did not the fuse and the surge protector in the DB boks is that important.

There may be inline fuses on the roof, I don't know how likely that is in South Africa.

My understanding is that surge protection is very important in South Africa, due to the high frequency and intensity of thunderstorms. You would not put surge protection on the roof.

Posted

There are only a 63 A brakerbetween AC /DC I wil check the roof for a fuse if not is it only the positive line get a fuse and what Amps the frequency on systems shows 50Hz

Posted
3 hours ago, Coulomb said:

My understanding is that 23 and 23 means start at the start of hour 23 and end at the end of hour 23. In other words, it applies only from 11pm to midnight. I suspect that's not what you wanted.

0 and 23 would mean all day, as I understand it (starting at the start of hour 0 and ending at the end of hour 23).

Okay thanks I set it to 00/23

Posted
19 hours ago, Wurm said:

There are only a 63 A brakerbetween AC /DC I wil check the roof for a fuse...

63 A? Perhaps I'm misunderstanding. That sounds like an AC rated breaker in the Distribution Board (which I would call a switchbox).

Is there no DC breaker box at all? Does the cable go from the PV input directly to the roof? You need a way to isolate (disconnect) the PV in the case of an emergency, like smoke pouring out of the inverter. You can't have to go looking for a ladder in an emergency. Presuming that you have roof-top isolators in South Africa? But perhaps you managed to skip that particular regulatory lunacy.

Hopefully there is a box there that you hadn't taken notice of before, with DC rated isolators (dual pole), and hopefully also the surge protectors are in there.

I don't know about surge protection on the utility connection; we don't have that in Australia (or PV surge protection, usually).

Posted

Hi Coulomb The 63A isolater switch is the 2 way switch that I select between utility( Escom ) and inverter output to loads the Pv in to the inverter input  pv1 have a insulator switch but don't know about the fuse if it is necessary I'm sure if Pv have a short or lightning strike the insulator might trip.Ns today I notice that inverter switch long periods to utility even the Pv have good output  so I reduse prog 12 to 47v hope it will be better tomorrow.

Posted
19 hours ago, Wurm said:

I notice that inverter switch long periods to utility even the Pv have good output  so I reduse prog 12 to 47v

You might also want to reduce setting 13 (back to battery); that's the one that affects how soon it gets switches back to battery once it's in line/bypass mode (same thing on this model).

But if 12 and 13 are too close, you can switch too frequently between line and battery modes.

Note that with factory firmware, once you're in line mode, it won't switch back to battery mode under any circumstances for 10 minutes. This is reduced to 2 minutes in fully patched firmware.

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