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About ghatikar

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  • Birthday 12/11/1971

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    IoT, EV's and Solar- In general LIFEHACKING

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  1. GFPR specially tested one like Fronius is expensive and I am sure the Chinese have no product with that. it does disconnect at 51 HZ So my Generator logic of SOC based contractor does that - the GTI only gets connected if the SOC is below 95% . or there is enough load on output ( was 100 watt for 500-watt GTI for 1000 watt GTI I can even set 500-watt minimum load needed before GTI kicks in I agree with the second caveat - but a man can dream to prevent battery voltI have a contactor disconnecting GTI ( SOC above 99 %) plus AC OUT2 disconnects at 57V as a backup. ( can be set lower but then AC out2 flip flops during normal charge cycles )
  2. I was wondering if my thinking is correct or I may end up with a big paperweight on my hand. Recently I came across this product - https://www.aliexpress.com/item/1000W-Battery-Discharge-Power-Mode-MPPT-Solar-Grid-Tie-Inverter-with-Limiter-Sensor-DC22-65V-45/32762489820.html It is essentially a 1000W Grid-tie inverter with built-in export current limiter which can work with lead acid battery bank instead of PV panels as DC input I was thinking to use it on the output of 5 KW Quattro with Current limiter CT inserted between Grid-tie and Quattro ( see crude sketch attached) So in normal working, the Grid tie will supply the house power essentially stoping Quattro from discharging its battery( BYD lithium in my case) or drawing from the grid . ( using islanded mode) The grid tie inverter can be set to stop working on any voltage setpoint so as an example set it to use lead acid upto 48V or even insert a power contactor driven by BMV to disconnect SOC below 50 %) The grid tie maker claims 3 second reaction time on the power control ( from Full 1000 watt to Zero ) . If the combination work can give many advantages 1. Use Large /OLD lead acid bank fed from solar charge controller - remotely located ( SAY in a different shade 50 meters away) and tie to the main inverter 2. Reuse the old lead acid bank instead of discarding when changing to lithium using an el Cheapo charge controller 3. tie two different banks together of different battery types /chemistries 4. Increase the total load capacity e.g. 5KW Victron can handle 6 KW load at 40 DEG ambient with one 2000 watt grid tie attached for the temporary peaks of washing machines or vacuum cleaners I am aware that the power conversions from DC to AC do not make it the most efficient systems In real life case My lead acid of 400 AH is being fed from 5.5 KW solar panels through 2 No.s of Axperts ( total 10 KVA) and gets used only on weekends, public holidays as it supplies only airconditioning and washing machines, water heating etc. So essentially the 5.5. KW panels can feed the Quatro through the grid tie but also keep the lead acid bank topped up for nighttime AC operation in case of power failures. The Axeprets are set to charge bank only using AC and set at default solar mode so use grid only in the night T I have successfully setup a APS systems microgrid tie to work with Quattro AC/OUT 2 for my office. as the only power required is during weekends to keep batteries charged when generators are not running and the grid is not available - see attached logic and scheme ( I am on ground floor of 4 story building and the 4 mm2 cables would have been costlier than the whole setup) I am using PV inverter assistant and generator Logic to disconnect PV inverter when the grid is available in addition Quattro ACout will switch off using the assistant with battery voltage higher than 57V to avoid feedback into the main battery - see similar scheme in operation in my office ( using panels on 500-watt grid tie inverter) assitants summary.docx
  3. ICC version 2.3.0 out now!

    @watkykjy1 Updated to fresh PI image downloaded from website. The problem still exists but I could nail it down to one reason IN Detail, Downloaded fresh image - checked local emoncms working - did the necessary settings as per my install - NO emoncms posting! Again started from the fresh image - no PI settings changed only changed in ICC - NO EMONCMS posting Again started from fresh - went one setting at a time - every time checking if EMONCMS was working BINGO - it seems for whatever reason enabling BMV on USB tickmark stops EMONCMS posting immediately. - The moment the BMV is disabled EMONCMS posting is back. The system is online if you want to have a look ( at the moment BMV disabled)
  4. ICC version 2.3.0 out now!

    Rebooted . also cross-checked if the WriteApi was correct. - still no luck Interestingly ICC thread does not show error now but there is no input reported on emoncms both remote ( Centurionsolar) and local host The local was not working for a long time ( i think from 2.6 or 2.7 ) but remote to emoncms.org was working - see screenshot Have sent the password to @Manie
  5. ICC version 2.3.0 out now!

    @watkykjy1 Marvellous update. ICC far surpasses other software with the new features few issues though 1. I did the in-app update using update button - Should I be using a fresh image? - what is the recommended path 2. I could not see a button or tab where I can selectively switch off inverters 3. ICC posting is not working to centurionsolar - On the threads tab under EMONCMS 2 - " Error posting data - Error 401" 3. How long the centurionsolarservers keep the data - If more than 6 months then I can just switch off local EmonCMS and post to EMONCMS and centurionsolar ( unless you want to add one more cloud posting I am under user ID : ghatikar and machine can be acessed using REALVNC i believe @Manie already has access enabled.
  6. VE direct usb 2 PI 4 ICC

    Should be ticked. and BMV should say thread running with time indication
  7. VE direct usb 2 PI 4 ICC

    Just to check did you tick the use BMV under battery control? What is the bmv thread saying on the threads info tab
  8. Victron CCGX

    The meter issue was partially resolved - We narrowed it down to cable or the USB /RS485 converter - The whole USB bus shuts down after power is restored to ET112 . The ET340 does not exhibit same behaviour I will replace the cables with CAT6 ( using telephone cable) over weekend and see if it goes away or alternatively only plug Et112 to a separate venus on PI and check Izak tried alternative drivers etc before concluding it is a hardware issue steps until now -------------- . Both meters are plugged in directly to venus 2. The problem is only with ET112 3. even if the power of ET112 is removed the ET340 continues to function 4. If the power comes back within few seconds the ET 112 returns and function normally 5. If the power to ET112 restored after a delay of 1-2 minutes the ET340 also disappears along with ET112 6. Both USB ports actually lose their power ( confirmed with USB doctor) and plugging in FAT32 8 GB drive 7. It does not matter which USB port of Venus the EM112 is plugged in 8. Both cables are extended by the same quality twisted pair Telephone cable 9. EM112 is closer than EM340- approximately 5 meter away while EM340 is approx 15 meters away after reboot, the power to USB port returns and both meters or the meters function normally Some videos ( sorry for the crappy quality ) I can try to switch the USB (RS485) cables to localize if the problem is cable or EM meter However, Can do that over weekend only If you want any other feedback or changes Let me know 1. General system - https://youtu.be/wTT5WC2PNnA 2. Short power interruption meter works normal - https://youtu.be/wHcPGJjt6As 3. Long power interruption - Both meters vanish - https://youtu.be/xw4Ee0bFgKw 4. general status of the system when USB bus dead but Em112 has power - https://youtu.be/utBQC6aV1vc
  9. Victron CCGX

    I never needed to use the password as far as I remember. May be it has to be locked first before you need password . - The assitant password was removed I guess
  10. Mainly directed at @plonkster With the distributed voltage and current control enabled in my Venus GX with 2.12.17 I am seeing a strange See Saw pattern of the battery terminal voltage - probably because BYD has some hysteresis built in for charge and do not charge values and the Venus + Quattro internal circuits slowly drains the BYD dopping terminal voltage over 3-4 hours from 57 V to 54.8 before the charger switches on briefly and brings it back to 57 V and stops charging ON previous logic with Quattro in control the battery terminal voltage remained on 55.2 Any method using dbus to monitor the Allow to charge contacts status to find out if the voltage is being controlled by contact or by Distributed voltage /Current logic needs a short name ( DVCC?) I have turned it off and gone back to conventional Hardwire 1. Distrubuted voltage and current control - See Saw ./Sawtooth pattern Battery terminal voltage 2. Before the upgrade stable voltage 3. 7 days history
  11. Victron CCGX

    The password is only needed on all firmwares. I think on 2.1.xxx it is removed.
  12. Which batteries should I buy (rhetorical question)

    BYD recommends 3 x 2.5 KWH for a 5 KW solution. my 10 KWH ( 4x 2.5 ) 48 V system regularly reports 140 Amps charge-discharge limits at 30 DEG . This charge limit drops rapidly when the temperatures are lower than 12 DEG C
  13. Axpert 5 kVA patched firmware 72.70c

    @plonksterThank you, your link put me on the correct path. I found a CANBUS whitepaper ( backtracked from MODBUS .XLS) Canbus seems to be preferred choice for lithium vendors. I noticed from today's email from Bluenova that they went from NO communication to MODBUS to CANBUS Hopefully one day it will be industry standard and you can plug in any battery to any inverter VE.Can-registers-public.pdf
  14. Axpert 5 kVA patched firmware 72.70c

    Is there a communication white paper apart from thishttps://www.victronenergy.com/upload/documents/Whitepaper-Data-communication-with-Victron-Energy-products_EN.pdf)( where it explains which Dbus values to address IU have attached The Herewin Canbus protocol for another inverter ( i think Goodwe ) . They need spoon feeding on what registers to use and what canbus address as they could not figure out on their own. and Lithium batteries is not something I am willing to experiment my limited programming skills on Otherwise, I am planning to do the scheme hardwired " allowed to charge and allowed to discharge contacts to multi ( Lynx Ion assistant)" with battery protector as additional safety ( remote on off from Battery BMS) and programme 0 ( Low voltage cut off at 42 V) The herewin Battery has Pretty wide tolerance ( discharge 40 V and charge 58.4 Volts ) making it almost drop in for lead Acid applications BMS Protocol (CAN) _Can.pdf Manual-Connecting-other-lithium-battery-systems-to-Multis-and-Quattros-EN.pdf Whitepaper-Data-communication-with-Victron-Energy-products_EN.pdf 48V 210AH(10.08kWh) datasheet for ref..pdf Manual-Battery-Protect-48V-100-A-EN-NL-FR-SE-DE-PT-ES-IT.pdf
  15. Axpert 5 kVA patched firmware 72.70c

    @plonkster I have asked Victron Both to sales@ xxxxx , docal distributer and Mattijias directly so far no results. I am trying to get canbus of another Chinese battery (compliant. The chinese did not get hold of any document from Victron so far and are willing to spend development efforts to design it the battery http://www.herewin.com/en/ProductShow.asp?ID=148 is less than 3000 USD for 10 KWh with 2000 cycles. I have asked herewin to put allow to charge and allow to discharge and I will use it that way with a 3 KW multi for my office