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randomwalsh

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Posts posted by randomwalsh

  1. On 2022/05/24 at 1:57 PM, solarman said:

    Hi All,

     

    I'm having trouble with a backup system Revov 10.2kW and Victron MP II 5000. No Panels.  I've got the following document from Revov. Any other insights you might have regarding the settings of this system? 

    The inverter seems to be tripping for no apparent reason. This is feedback from the site: 

    • Sat 21 May power off at 15h40 for approx. 30 secs, Eskom still on.  All fine until….
    • Sat 21 May power off at 18h25 for approx. 30 secs, Eskom still on, power then on for approx. 15 secs and then off again for approx. 30secs. Sequence repeated again and I switch over to Eskom to avoid damage to electronics.
    • Sat 21 May 19h28 reset inverter as it was completely off, switched over to inverter again from Eskom but isolated inverter from mains so it could run off battery. No further issues experienced and left it like this until …..
    • Sun 22 May 07h43 switched mains back to inverter to charge batteries which were at 71%
    • Sun 22 May at 09h24 power off for approx. 30secs, Eskom still on, batteries at 97%.  Again power out at 09h27, Eskom fine , so switched over to Eskom direct and left it like this, which is the current status.

     

    I'm trying to establish what could be wrong, faulty inverter, wrong settings or battery issue. The revov technician went to site and said the battery is OK, on the victron forum they said if a MP goes off when SOC is near 100% it could be a cell imbalance. This is why im looking at settings ATM, Any help will be appreciated. 

     

    Hi did you resolve this issue yet? If not I can try assist.

  2. On 2021/09/09 at 7:53 AM, [email protected] said:

    This is what I do,  have done the PV Green Card Installation Course. This is what is recommended. A fuse on the Positive and Negative legs, a surge protector and a Double Pole Isolator switch. See drawings below. No fuses on the roof, only connectors where you can disconnect if needed. If you disconnect make sure the fuse on bottom panel are disconnected as it can cause big spark. Earth the Solar panel structure and connect to a separate earth Pin, 1.5mters so that lighting would be taken direct to ground and not to Electrical Earth.

    I ordered all component's from Solar Europe in Pretoria. Solar Europe - Solar Energy Brands Importer and Distributor (solar-europe.co.za)

     

    07 Panel PV Isolation Layout.pdf 37 kB · 60 downloads 08 Panel PV Isolation Layout.pdf 30.15 kB · 57 downloads

    Hey.

    I have question about why in your diagram you have a positive going into pole 1 on the beny isolator and then coming out on pole 6. Is that how those beny isolators work? They aren't straight channels?

  3. On 2020/05/01 at 3:07 PM, martynw said:

    From what I've been able to gather by comparing what the ME3000SP reports via its own RS485 interface and the console data (or RS485 data) direct from the Pylontech battery packs, the ME3000SP is using the lowest percentage remaining reported from each of the battery packs to determine when to stop discharging.

    If I look at the CANBUS data direct from the battery packs, this is using a much simpler protocol which provides an averaged percentage remaining for ALL the battery packs.

    So for example at the moment the ME3000SP is reporting 35% remaining, which matches the lowest reading from a single battery pack (via the console on the battery packs), whereas the CANBUS is reporting an average of 41%.  

    I asked Sofar Solar technical support about this and they claimed that there's no difference in connecting to Pylontechs using RS485 or CANBUS but I'm not sure that I believe this now.  My guess is that when connected by RS485 they're trying to do their own calculations based on each individual pack reporting to determine when to stop discharging. Could be that they're not even processing all the packs, which might be why the capacity is only showing at 200AH.

    Based on that I think I will switch the ME3000SP to connect to the Pylontechs using CANBUS instead as to me it looks like this is presenting a simpler data set for the ME3000SP to use - difficult to see how it can go wrong if it only has one averaged SOC to deal with!

    what happened in your quest?

  4. On 2021/05/19 at 3:37 PM, Coulomb said:

    Why do you want to do that?

    You can plug in a type A to type B USB cable into a PC, and use Watchpower directly, or I think you can use some types of comms programs.

    If you want to talk to a Pi or Arduino, that's much harder. I don't know of a solution off the top of my head.

    To integrate with a Hubble battery and a riot cloudlink device.

  5. On 2021/05/03 at 2:11 PM, PurePower said:

    The v1.9 firmware solved my error in a mixed packed. I have a master US3000C, US2000 and 3 x US2000+ modules. Working perfectly for the past 5 days. Only noticed the SOH count going up on Cell6 on my US3000C daily... Pylontech said i shouldn't be concerned about it as no alarms have been triggered. 

    I have to just keep wondering what that SOH count means and watch it grow... 

    image.png.f2b46c2f9453af2a526196fd0c14034a.png

    Hey where do you get the updated firmware? specifically the pylon us3000b

  6. On 2021/02/24 at 12:01 PM, Kill_switch said:

    I also have ordered the RIOT for remote monitoring previously, got confirmation that Hubble is sending me the required cable to the upgrade the battery firmware with my RIOT shipment.

    Hi,

    Why did you order the RIOT as well when paired with the Sunsynk? Isn't the Sunsynk cloud connected?

  7. in the hope to not seem uneducated but why do you need to move the neutral /  earth with a relay? 

    Why can't you instead just star the output of the inverter at either the first output breaker or the changeover switch?

  8. Hi, 

    Does anyone have experience with these batteries?

    I want to find out about the maximum slaves the master battery can control. I know the spec sheet says 8 batteries in total but then the local supplier says the maximum is 1 master and 3 slaves.

    Then there is this installation video that shows how to do the install from the beginning to the end, and the last option leaves to opening ended by titling it setting for multiple e-kwbe.

    I want to know if I can do 1 master and 4 slaves basically using the setup of (5,5) for the master and then (3,2);(3,3);(3,4);(3,5)

     

     

  9. On 2020/01/14 at 2:04 PM, Barry Williams said:

    Good afternoon All

    I am looking to make contact with anyone who has experience with Victron & Dyness.

    My system seems to have communications problems although the cable used is that specified for Victron.  My system only sees the storage capacity of the 9.6kWh Powerbox as 50Ah rather than 200Ah.  It also does not show any of the details from within the batteries.

    image.png.1848ba604835a7c6267ec2b64445071b.png

    This shot is from a site with 2 x B4874 batteries in parallel but the capacity is incorrect.

    Hi,

    Have at look at this thread and see if it helps solve your issue

    https://community.victronenergy.com/questions/31234/victron-compatibility-with-dyness-lithium-batterie.html

  10. On 2019/12/12 at 4:14 PM, Coulomb said:

    Your battery is only 5 kWh nominal, about 1 kWh usable. That's very little.

    Also, you should limit your power draw to about 1 kW, for decent life. That's one smallish load for one hour. You could stretch that to say 2 kW (small jug, microwave, induction cooker, etc) occasionally, but no other loads and one at a time.

    So really you need twice or better yet four times that capacity to get full use from a 5 kVA inverter, and to be able to live comfortably during load shedding.

    650 W of panels is also extremely light. You can't expect much more than 500 W under ideal conditions. 

    If you only have very modest power and energy needs, then consider a smaller inverter. A 5 kVA unit will have considerable idle power draw (circa 50 watts, depending on the model), and will waste a chunk of your very limited panel power.

    What would you put for the low battery cut off , bulk charge and float voltage for this system?

  11. 2 hours ago, plonkster said:

    Either will work, but "Other" obviously doesn't implement the precise voltage and frequency levels required by NRS097-2-1. It is still safe, it still has loss of mains detection, but if you can use NRS097-2-1 it is better. Using "Other" will not sign off (assuming that is a thing you need to do) unless you add a Ziehl (again, assuming you are in a place where that is accepted, ie not in Cape Town).

    For inverters other than the Multigrid or the Multiplus-II, you cannot use NRS097 anyway, you are forced to use Other.

    Ok yeah we mostly do quattro's at the moment. 

  12. @The Terrible Triplett there is no mppt, just ac coupled Delta's. 

    @BDL It seems to be different to what you are saying, I have disabled the feed in excess solar power setting before and it has reduced my pv inverter yield so that it doesn't feed back to the grid. I wanted to test it now but unfortunately the weather in durban is not being kind to my solar sites. I will have to wait for a sunny day to see the real world results of that setting. The ac current input is set at 50A on the quattro and there is no setting activated to limit the pv inverters in the ess. The delta are enabled on PF Control to 50%

  13. On 2018/09/24 at 7:11 PM, plonkster said:

    4. Set the grid code to NRS097-2-1. When you do this the first time it won't ask for a password.

     

    @plonkster I was told to use other in this setting by my dealer. Is this not correct?

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