Solar PV Hints, Tips & Troubleshooting

graememk

https://www.boards.ie/discussion/comment/122829823#Comment_122829823

Is it pure east more north east?

This time of year north east doesn't do well

KingPanko

@championc Thank you. Yes both strings have the same number of panels and am looking at them seperate. The voltage is similar, often the East would be 550 while the West around 600 but other times there would be less of a difference. What is that an indicator of?
The main difference is in the amount of amps from each string, the West is usually outperforming the East and the string has higher amps to achieve this.

@graememk Thank you. Good question, it is very close to being East. If North is 0degrees and East is 90 degrees, I would estimate my roof is somewhere between 82 and 85 degrees. I doubt that would account for the difference, what do you think?

graememk

https://www.boards.ie/discussion/comment/122832568#Comment_122832568

It shouldn't make that much difference it's pretty much E-W

What panels have you on? Do you have graphs of the voltage?

This is mine, NE/SW on a agri shed, so a walkable roof. early morning before production really starts they should be the same.

Pv2 is NE

KingPanko

https://www.boards.ie/discussion/comment/122832818#Comment_122832818

I have Jinko 585W panels. Inverter is Sigenergy.

Mine is also a shed roof and only around 12degrees to can also be walked around up there.

Thats a good graph you have, I dont think I can produce the same, all I see on my app is the live info of the strings. I have been taking screenshots to keep an eye on it. There is not a material difference between the voltage between them, my app displays the voltage and amps of each string and it is the amps that is underperforming. On a dull day the West is out performing East all day, yesterday the sun shined, at 10am the East was just about outperforming the West but by midday when I would have expected them to be the same the West was doing 36% more (based off KWs, voltage was similar, amps were different). By 13:30 the West was doing 85% more than the East (again based off KWs, they had similar voltage).

Yesterday nothing too unexpected, what confuses me is on a dull day why is West outperforming all day, also midday I am surprised that West is outperforming East.

Liam2021

Hi all,

Got new update from dolis today now all the settings have changed.

What does the SOC need to be set to so the battery will charge between 2am and 6am. Is below picture OK?

VinLieger

Just got a 4.4 10 panel system installed with a solis inverter and 2 dyness 5kWh batterys. Ive got a smart meter, have moved to a day/night/peak plan and ive set the inverter to charge the batterys during the night hours.

Just looking for tips on what else i can be doing to add efficiency beyond using/not using certain appliances at certain times. Are there settings on the inverter i should adjust? move the base battery charge lower than 20% etc?

Thanks in advance for any advice.

mjatkey

https://www.boards.ie/discussion/comment/122835890#Comment_122835890

Hi, can I ask did you ask for software upgrade and if so what version is this? Also are there similar changes in the discharge section (ie adjustable current and soc) per time period.

I'd say if you want to charge to 100% you'd need to change the 10 to 100, but maybe check with Solis.

Liam2021

https://www.boards.ie/discussion/comment/122838643#Comment_122838643

We asked for some support as the battery was dropping charge for no reason. I think they have sorted that issue now.

The discharge screen has tge same set up.

YYes The SOC needs to be 100% so the battery will charge at the tmed settings at night

Borax2709

Hi all - I had a Dyness fitted with my solar install but only goes to 20% and then stops.

Looking @ https://www.dyness.com/products/dl5-0c it suggests a Depth of Discharge of 90% and not my 80%.

Is this possibly the installer being over-the-top careful with the battery? And could/should I change something to get more use from it?

graememk

https://www.boards.ie/discussion/comment/122841678#Comment_122841678

The default settings on the solis is to stop at 20%. It's likely that

Borax2709

Should I be comfortable enough changing that to stop @ 10% then? Seems v straightforward - can find the spot in the manual no problem.

https://midsummer.ie/pdfs/sofar-hyd-user-manual.pdf

Just wanted to make sure I'm not misunderstanding the set up.

con747

https://www.boards.ie/discussion/comment/122841787#Comment_122841787

Just check your Dyness model is warrantied to discharge to 10% and if it is then there's no problem dropping it to 10%.

Borax2709

https://www.boards.ie/discussion/comment/122841862#Comment_122841862

Would the DOD detailed here (90%) be what I'm supposed to be looking for - or would they have that figure there but actually require a smaller DOD for warrantee for some reason?

 https://www.dyness.com/products/dl5-0c 

con747

https://www.boards.ie/discussion/comment/122842021#Comment_122842021

Looks like you should be ok, that says 90% so you are covered by warranty.

LowPowerMode

https://www.boards.ie/discussion/comment/122839516#Comment_122839516

Hi Liam2021,

I'm having the same issue that you were having with the battery SOC - was it just solis that you contacted about the issue and didn't need anything to be changed on the Dyness battery side? Also what e-mail address or contact method did you use to get solis to do that software update? Any guidance you could give would be greatly appreciated as my battery is emptying every day now so the issue is much more noticeable/annoying

LowPowerMode

duplicate post

Liam2021

https://www.boards.ie/discussion/comment/122843647#Comment_122843647

Pm sent

joe cluxton

Can I ask a question on behalf of a neighbour who isn’t on Boards. We both have identical systems from same installer, 4kWp both E/W split, 2.4 Kw Dyness battery same inverters and diverters. His system installed 3 years ago mine 18 months ago. Our our production, consumption figures etc are generally very close. Recently his solarman app shows battery SOH 70%. Mine shows SOH 99%. Installer came out 2 weeks ago but couldn't resolve the issue said he will have to consult an engineer and come back to my neighbour.

Finally the manager contacted him after he had made repeated phoned calls including asking for a replacement battery. It now transpires that the manager checked some of their other customers data online and several of them have the same issue . All installed about 3 years ago and all are showing 70% SOH after 3 years. Installer says it is probably a software issue and they have contacted the battery manufacturer seeking a solution. They have promised to resolve the issue for my neighbour. Am I wrong in thinking that the installer must be able to check the actual SOH as opposed to what the app is showing Has any one else here had the same issue and or any thoughts on as to whether it is actually a software issue or could it be a batch of faulty batteries. Again any input from people here would be very welcome.

graememk

https://www.boards.ie/discussion/comment/122853374#Comment_122853374

The State of Health, of the battery is reported to the inverter from the battery. Inverter does no calculations on it at all.

What the inverter gets on the app is what the battery is reporting. So talking to the battery will get directly won't get any different answer

10-10-20

https://www.boards.ie/discussion/comment/122853374#Comment_122853374

The facts are that 3 years ago batteries tended to be undersized (due to high costs) and with enough charge/discharge cycles, it could well be deteriorated, in fairness. What size is your neighbour's battery?

joe cluxton

https://www.boards.ie/discussion/comment/122854402#Comment_122854402

Both of us have 2.5Kw batteries same panels and almost identical production and consumption figures. The only difference I charge my battery at night and he doesn't so I am doing more charge/discharge cycles. My SOH is 99% and his is saying 70%. Installer has said that several of their customers, all of whom had installs at the same time as my neighbour, are showing 70% SOH. The installer himself said their is no way that they should be displaying 70% after only 3 years. It just seems odd to me that a batch of batteries all installed in the same month 3 years ago are all now showing a 30% drop in SOH and other batteries installed at the same time are not showing the same level of degradation.

championc

At only 2.5kWh, they will be getting a severe workout. Those things are made with crappy pouch cells too, rather than proper individual cells.

slave1

This is why I sold my grant aided battery as soon as the grant hit my bank account and went DIY

hydrus21

Hi guys.

Any advice on what cables needed to run from inverter to fuseboard ( 10m ).

I have ceilings down and stud walls exposed so thought a good time to future proof for solar/ battery.

Thanks

hydrus21

Sorry.

Just realised i'm on the wrong thread.

deezell

https://www.boards.ie/discussion/comment/122864400#Comment_122864400

2.5 2core+E

System

This discussion was created from comments split from: Domestic Solar PV Quotes 2024 - No PM requests - See Mod note post #1.

graememk

https://www.boards.ie/discussion/comment/122864379#Comment_122864379

Id go at least 4mm2, as you could be potentially putting in a 5kW inverter.

Also would run 2 cat6 cables while your at it too (for CTs and such).

One to be used, and one to be a spare.

Borax2709

https://www.boards.ie/discussion/comment/122841787#Comment_122841787

hmm - on this - have set the DOD to 90% - but am getting "ID124 BatLowVoltageAlarm" errors in the event list - and it looks like every time we hit 10% capacity on the Battery that it immediately recharges back to 20%.

Am considering setting DOD to 89% as a test to see if this is just something silly like difference between "<" and "⇐" somewhere in the system.

Definitely don't want to kill my battery!

brownep

Hi. When my system was installed 4 yrs ago I had specified that I wanted the option to run "off grid" if there was a power failure. The installer fitted a hefty two pole three way switch to switch over as needed. It has never worked properly even with only lights supplied. I isolate all my sockets etc with the RCD to minimize any surge. After all this time the installer is still "thinking" about it. There are some settings about which I am unsure and also a possible wiring issue. In advanced settings under the control parameter heading I see that the battery current is floating around the low single digits. See attached pic. The wiring question I have is that a grid fail relay with a controller is supplied with a constant live connection, bypassing the changeover switch. Can that be right? A side effect is that the so called isolation switch is being bypassed on the live side leaving it connected at all times to the power sockets but switching off the neutral. I have a Solis 5k hybrid inverter with two Pyleron batteries, one 2000 and the other 3000. Has anyone got a similar system with successful off grid option?

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