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Posted

Hi guys, i’m very happy with this forum, because i can’t find important info elsewhere. 
Let’s start saying what installation i have:
 

I have an Infinisolar 3-phase 10KW inverter

18 panels Atersa 335Wt

6 Pylon Lithium bateries 2.4KW

Settings:

PV Energy supply priority setting: Off-Grid (I)

Max. charge current 100Amp

Max. charge current AC 50Amp

Bulk charge 53,2V

Float charge 53,2V

 

I would like to use as much battery power as possible, let’s say, discharge everyday to 25-30%.

 

I would like that any PV amount above my load will be used to charge my batteries. If PV drops below my load (clouds or towards the end of the day), the system will draw the shortfall from my 6 Pylon batteries.

Once my PV is down to 0, it will draw my full load from the Pylon, (with gridhelp; in case cooker, kettle and coffeemachine are needed at the same time)

Once my Pylon voltage drops to my 'Back to Grid voltage (discharged to 25% i don’t know what voltage that is, yet), it will switch over to Utility.

It will run on Utility until my Pylon’s have been recharged back to the 'Back to Discharge Voltage' setpoint (what voltage setting?). Then it will run on PV/Battery again until my Pylon’s voltage drops to my 'Back to Grid voltage setpoint again - and so on...

 

Questions:

What settings should i make for:

-Battery cut-off discharching voltage when grid is available?

-Battery re-discharging voltage when grid is available?

-Battery cut-off discharching voltage when grid is unavailable?

-Battery re-discharging voltage when grid is unavailable?

-Max. battery discharge current in hybrid mode?

 

Any help would be more than welcome again.

Thnx in advance John Bijker

Posted
1 hour ago, [email protected] said:

Please give me more details on your battery bank.

He already gave you the answer.

4 hours ago, John Bijker said:

6 Pylon Lithium bateries 2.4KW

Pylontechs are 15s LiFePO4 batteries

Posted
4 hours ago, John Bijker said:

Questions:

What settings should i make for:

-Battery cut-off discharching voltage when grid is available?

-Battery re-discharging voltage when grid is available?

-Battery cut-off discharching voltage when grid is unavailable?

-Battery re-discharging voltage when grid is unavailable?

-Max. battery discharge current in hybrid mode?

What possibilities do you have when you put your inverter in PYL mode? Guess it will automatically fill in the right values.

Posted

 

The PYL family is part of an extensive line of maintenance free, gas recombinant VRLA batteries offered by GS BATTERY (U.S.A.) Inc. The 10 year design life PYL is the most cost effective battery solution over the total life cycle

Posted (edited)

I’m still waiting for my BMS Card (to communicate with the batteries) for the intelligent slot of the Infisolar 10KW

so i need to know the values untill the BMS Card will manage..

Edited by John Bijker
Posted (edited)
On 2020/07/31 at 5:42 PM, John Bijker said:

Questions:

 

What settings should i make for:

-Battery cut-off discharching voltage when grid is available?

-Battery re-discharging voltage when grid is available?

-Battery cut-off discharching voltage when grid is unavailable?

-Battery re-discharging voltage when grid is unavailable?

-Max. battery discharge current in hybrid mode?

Hi John!  We have very similar systems and use them in the same way, so I will gladly share my settings with you.

I run my inverter in "Grid-tie with backup II" mode and use "PV - Battery - Grid" to supply load when PV is available.  I use 100A as max discharge in hybrid mode because that equates to 5kW (my inverter's upper limit) and I don't (usually) exceed that.  I don't export to grid and I don't use the AC charger either (I have enough solar capacity to cater for all but the worst weather, plus enough battery storage to survive an off-grid night without fully charged batteries as happened on July 28).

My bulk & float charging is set to the same voltage because the BMS system inside the Pylontechs manage their own bulk and float cycles any way.  I use Pylontech's lower voltage limit (52.5V) for charging.  I've brought my maximum charge current down somewhat (to 70A) because it allows the inverter to run a lot cooler, whilst still recharging my batteries by noon.

I run the following battery cut-off points.  I found that 48.4V equates to about 25-30% SoC given my base load.  I've selected a 0.5V lower limit for when the gird is unavailable in which case I asume (never had tit happen yet!) that the BMS in the batteries will decide when to stop the party:

image.png.6e94019f7839d621a8ab69f8c3bd9a92.png

My base load at night drops to about 500W and in mid-winter (longer night) it runs the batteries down to about 40% SoC.  Here's a graph showing battery voltage vs. SoC over the past few days to give you an idea.  July 28 shows you how much the voltage can vary whilst charging/discharging during an overcast day (while SoC remains constant), and also how my 48.9V cut-off seems to be very tough to breach:

image.thumb.png.17d7f8df7f88117e1be2f9ca16720d9f.png

Hope this helps!

Edited by ChristoSnake
Removed lots of blank lines at end of post
Posted
10 hours ago, ChristoSnake said:

Hi John!  We have very similar systems and use them in the same way, so I will gladly share my settings with you.

I run my inverter in "Grid-tie with backup II" mode and use "PV - Battery - Grid" to supply load when PV is available.  I use 100A as max discharge in hybrid mode because that equates to 5kW (my inverter's upper limit) and I don't (usually) exceed that.  I don't export to grid and I don't use the AC charger either (I have enough solar capacity to cater for all but the worst weather, plus enough battery storage to survive an off-grid night without fully charged batteries as happened on July 28).

My bulk & float charging is set to the same voltage because the BMS system inside the Pylontechs manage their own bulk and float cycles any way.  I use Pylontech's lower voltage limit (52.5V) for charging.  I've brought my maximum charge current down somewhat (to 70A) because it allows the inverter to run a lot cooler, whilst still recharging my batteries by noon.

I run the following battery cut-off points.  I found that 48.4V equates to about 25-30% SoC given my base load.  I've selected a 0.5V lower limit for when the gird is unavailable in which case I asume (never had tit happen yet!) that the BMS in the batteries will decide when to stop the party:

image.png.6e94019f7839d621a8ab69f8c3bd9a92.png

My base load at night drops to about 500W and in mid-winter (longer night) it runs the batteries down to about 40% SoC.  Here's a graph showing battery voltage vs. SoC over the past few days to give you an idea.  July 28 shows you how much the voltage can vary whilst charging/discharging during an overcast day (while SoC remains constant), and also how my 48.9V cut-off seems to be very tough to breach:

image.thumb.png.17d7f8df7f88117e1be2f9ca16720d9f.png

Hope this helps!

Thank you very much for your answers!

so, for a 10KW inverter i could discharge max 200A? Or, because i have 6 Pylons only 150A?

Posted

Thank you very much for your answers!

so, for a 10KW inverter i could discharge max 200A? Or, because i have 6 Pylons only 150A?
 

What’s the difference between Grid-tie with backup (II)

and Off-grid( I)  besides feed into the grid (wich you don’t use)

Posted (edited)

Battery specs for the US2000:

image.png.24dec4bb2b7d8ed18d0fc54362c60208.png

So you can safely discharge six of them at 150A and not exceed their recommended limit.  Or go higher if your inverter, battery cabling and fuses allow.

"Off-grid 1" uses a relay to physically disconnect the grid completely and will only use a mix of pv & battery (no grid!) to supply the load.  When it's overcast & your batteries are flat you will lose electricity completely.

"Grid-tie with backup II" mode syncs the inverter to the grid and allows you to blend pv, batteries and grid to supply the load.  Using "PV - Battery - Grid" priority means that available solar will prioritise the load and additional current will be used to recharge the batteries.  When you disable feed to the grid & AC charger in this mode, you are effectively running off-grid but retaining the grid as a safety net.  Sort of like having your cake and eating it 😀

Edited by ChristoSnake
Added off-grid vs grid-tie info
Posted
12 hours ago, ChristoSnake said:

Battery specs for the US2000:

image.png.24dec4bb2b7d8ed18d0fc54362c60208.png

So you can safely discharge six of them at 150A and not exceed their recommended limit.  Or go higher if your inverter, battery cabling and fuses allow.

"Off-grid 1" uses a relay to physically disconnect the grid completely and will only use a mix of pv & battery (no grid!) to supply the load.  When it's overcast & your batteries are flat you will lose electricity completely.

"Grid-tie with backup II" mode syncs the inverter to the grid and allows you to blend pv, batteries and grid to supply the load.  Using "PV - Battery - Grid" priority means that available solar will prioritise the load and additional current will be used to recharge the batteries.  When you disable feed to the grid & AC charger in this mode, you are effectively running off-grid but retaining the grid as a safety net.  Sort of like having your cake and eating it 😀

Thnx. for the quick answers, i’m happy with them.

  • 3 weeks later...
Posted
On 2020/08/02 at 10:42 PM, John Bijker said:

Thank you very much for your answers!

so, for a 10KW inverter i could discharge max 200A? Or, because i have 6 Pylons only 150A?

 

On 2020/08/02 at 10:42 PM, John Bijker said:

Thank you very much for your answers!

so, for a 10KW inverter i could discharge max 200A? Or, because i have 

On 2020/08/02 at 12:13 PM, ChristoSnake said:

Hi John!  We have very similar systems and use them in the same way, so I will gladly share my settings with you.

I run my inverter in "Grid-tie with backup II" mode and use "PV - Battery - Grid" to supply load when PV is available.  I use 100A as max discharge in hybrid mode because that equates to 5kW (my inverter's upper limit) and I don't (usually) exceed that.  I don't export to grid and I don't use the AC charger either (I have enough solar capacity to cater for all but the worst weather, plus enough battery storage to survive an off-grid night without fully charged batteries as happened on July 28).

My bulk & float charging is set to the same voltage because the BMS system inside the Pylontechs manage their own bulk and float cycles any way.  I use Pylontech's lower voltage limit (52.5V) for charging.  I've brought my maximum charge current down somewhat (to 70A) because it allows the inverter to run a lot cooler, whilst still recharging my batteries by noon.

I run the following battery cut-off points.  I found that 48.4V equates to about 25-30% SoC given my base load.  I've selected a 0.5V lower limit for when the gird is unavailable in which case I asume (never had tit happen yet!) that the BMS in the batteries will decide when to stop the party:

image.png.6e94019f7839d621a8ab69f8c3bd9a92.png

My base load at night drops to about 500W and in mid-winter (longer night) it runs the batteries down to about 40% SoC.  Here's a graph showing battery voltage vs. SoC over the past few days to give you an idea.  July 28 shows you how much the voltage can vary whilst charging/discharging during an overcast day (while SoC remains constant), and also how my 48.9V cut-off seems to be very tough to breach:

image.thumb.png.17d7f8df7f88117e1be2f9ca16720d9f.png

Hope this helps!


 

 

Hi, i have changed all my settings to Tie-grid with back-up II. (Like you showed me)

I needed to change charging source to ‘PV only’  to force the inverter to discharge batteries, during the day, when the loads were higher then PV, otherwise Utility would have helped PV when loads were higher, instead of the batteries!

When i change to  ‘PV and Grid’ in charging source, utility will charge batteries and ‘help’ PV to power the loads! That’s not what i want...

Another question is: Are the dipswitches of the BMS-card OK for my system? (Infinisolar 3-phase 10KW with 6 pylontech US 2000 2,4KW)
 

Thanks innadvance

04287630-21E9-4B1F-AB9F-40DE2C5DE488.jpeg

F6CB452E-A41C-44D4-8CE2-7075BEC9D4BB.jpeg

3F95A0E5-911F-4FEC-B57E-C5175C8F8CA9.jpeg

Posted

Your settings are now equivalent to what I have on mine.  This should be perfect for maximum electricity saving with the benefit of grid backup when required. 👌

If you find that the inverter switches back to grid too soon in the mornings, decrease both of the "voltage when grid is available" settings down by 0.1 V at a time and see if it makes the required difference.  I keep them 0.5V apart to compensate for the voltage fluctuations you get when removing the load from the batteries.  If the inverter keeps switching between batteries & grid in the morning, they are too close and the redischarging voltage can be increased by 0.1V at a time until this behaviour stops.

I do not have any experience with the BMS card - I use ICC via a 🍓🥧 for al my monitoring...

  • 3 months later...
Posted

Hi again,

The infini 10KW works fine, after a couple of months. During sunny days when available solar charged allready my batteries, i would like to “feed-in to grid” my additional current. Here in Spain Iberdrola will pay €0,05/KWh. 
I just need to activate “Allow to feed-in to the grid” ? And i don’t need extra cards or meters?

What means the “Feeding grid power calibration R S T” ?

Many thanks in advance, John

ED96184B-1D3F-425F-BB93-78364E2F1566.jpeg

8A1C5160-268F-480F-83E7-DBF0772F63E4.jpeg

  • 4 weeks later...
  • 7 months later...
Posted

Any changes I make in SolarPower 1.14SP1 or 1.15SP9 to my Infinisolar 10kw Hybrid inverter take a few attempts to save (after entering the administrator password), then are ignored by the inverter. Any ideas? Screenshots show settings and morning after, BlueNova 12kWh LiFePo4 battery is at 52.8V, not the configured 51V...

 

 

IMG_4215.jpeg

IMG_4217.jpeg

  • 1 month later...
Posted

Hi guys, i installed an infinisolar 15kw. The the settings are Grid tie with backup II, and charges with PV only. The bad thing is, if connected to PV and Battery it works perfectly well. The same applies if its connected to grid and battery, but if i connect battery, pv and grid, it quickly goes to error 12. Went to a level of testing with new panels not installed and not earthed, it does the same. Anyone with an idea of what might be the error. 

  • 1 year later...
Posted

Evening John, Everybody,

I hope you don't mind me messaging but I'm struggling with setup of Infini 10kw with Pylon batteries and it seems like you have already figured this stuff out.

I have managed to connect via USB to the inverter using SolarPower software.

I have a MODBUS card which appears to be the same as John's above.

I have one of these 10kw inverters and another one coming on the slow boat from China; hoping to get one up and running and then add the slave when it arrives.

I have 15 of the us5000 PylonTech batteries which seem to be talking to eachother properly and balancing etc; however I don't think they are communicating via the MODBUS card with the inverter... No idea how to tell?

Are there drivers to install or something? How? Do I need it to talk to the Pylontech BMS or is it really just relaying the maximum and minimum charge voltages? The % charged on the inverter seems to be completely random maybe it would fix that?

I have the battery to inverter cable from the first battery in the chain hooked up to the modbus card; no lights on either one so I don't know if it's a successful link? How would I know of it's connected?

I have managed to change the AC charge Amos from default 60A to 200A as my battery bank is good for about 1500A continuous. It took a couple of trys to apply but I read somewhere that is common? I used "administrator" password which seemed to work eventually and it started charging at 200A before gradually dropping towards end of charge.

I believe I need to set it to G98 standard for UK? However that's asking for factory password and I have no idea what that is? Anybody?

I wish to set it to charge from 0030-0430 on my cheap rate tariff, then discharge from batteries during the day. Plus anything I get from solar is a bonus with offset load or if it exceeds load then recharge batteries.

However, when I set it in "MyPower Management" to "Grid-Tie with Backup (ii)" and ac charging duration to 0030-0430 it still charges from grid outside those times; any idea what I'm doing wring there?

I have a MODBUS meter which I intend to plug into the second port on the smart card so it can balance output against load; however I don't even know if the BMS is talking to the inverter yet so I haven't connect the meter up.

It's all pretty overwhelming tbh.

Any help would be appreciated.

Thanks, Alex

IMG_20221127_224437.jpg

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