Jump to content

Jaco P Bloem

Members
  • Content Count

    24
  • Joined

  • Last visited

1 Follower

Profile Information

  • Gender
    Male
  • Location
    Bloemfontein
  • Interests
    Electrical Engineering Powerflow

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

  1. Dankeschön @Payback2! I'm currently using the software by @Solar Assistant and is very impressed. It also utilizes Grafana. Appreciate the gesture.
  2. I'm not familiar with all the settings on this Inverter, but relating them to the 5kVa, they seem correct. I suppose setting 26 is the Charge Voltage which is fine at 2 x 14.1V. Also the float seem in order. The cable size and circuit breakers are in order as long as there is no poor connection and the cables kept short. If the installation and settings are in order, then it may be the battery quality. You should be able to cycle the 2 batteries to 50% (say 24.2V SOC) easily with a load of 175W (<6A) and this should take more than 2 hours. [In fact probably 75%, given they were su
  3. Hi For the benefit of the Forum, could you share more on the specific batteries (make and type) with their Specs used. Secondly post the Inverter settings - so we can see the mode, Charging and Floating Voltages, etc. Keep well Jaco P
  4. Jaco P Bloem

    Paul

    This is actually great news especially for Pylontech (and I suppose similar products) owners. So the BMS will treat and charge the new pack differently than the old. I wonder if the supplier still honor the full warranty in such a case - although I understand the warranty is in any case less when used with an Axpert as the Inverter cannot communicate with the BMS (except through 3rd party software like ICC). Important : @It's On if you start too small, I.e. with one Pylontech (3.5kWh) only, there is an issue here to consider.. and this is from actual experience at a friend's installation
  5. Jaco P Bloem

    Paul

    ..on most parts (i.e PV or even Inverter) you can expand at any time I agree. However you cannot add a new battery pack to an old unit or pairs. The cells did not age together so if you add new cells to old ones you have different charge (voltage) levels which will ultimately decrease battery life. In this case (parallel Axperts) the Battery bank is common to both the Inverters, and so you cannot expand the existing bank say after 1 year without replacing all. It is somewhat logical and is applicable to flooded / agm batteries also. I have found this post interesting : G
  6. Jaco P Bloem

    Paul

    I agree, the Pylontech batteries seem to do well, you can search for the best price. We've bought a set from Ellies, so you can ask a qoute from your local outlet, also check out Bonanza Technologies (excellent advice and support from the owner). My own set does not exist in the market so it won't help. If possible go big from the start - because the battery DC is all connected and bridged, you cannot expand easily if you wait too long. Either 3 x 3.5kWh or 4 x 2.8kWh units if possible. The single big 6 kWh @Krokkedil mentioned can also work depending on your load after sunset.. I was ad
  7. Jaco P Bloem

    Paul

    Hi, I have a similar setup with the 2 Axperts in parallel however I use two Lithium batteries with their own BMS. My opinion is that these Mecer inverters do not do a great job of charging, if left to it's own devices. If you are going to stick to Flooded (or agm) batteries then you will have to install a 'battery balancer' to balance the 12V units amongst themselves. The inverter do not have any intelligence to do this. I am sure I have seen units for sale in the PowerStore (?). Otherwise move to Life batteries with their own BMS, but this may be expensive.- there is great adv
  8. *or rather, the 54V sounds like settings for a 16S LiFe, we will have to find more information on your battery.
  9. Hi Do you perhaps have more information on the battery? If it is a 15 cell Life battery, the charge Voltage might be too high. I can propose the following : Bulk Charge : 52.5V Float : 51.8V Also setting 12 should be 48V then the battery will not drain completely (if this is your 'point back to Utility' setting? Setting 13 to 51 V (back to battery) If you can give this a try? It may be that the battery BMS protects itself from the high voltage (as 54V sounds more like flooded battery settings). Let us know Kind Regards Jaco P
  10. Hi Jaques A single 6mm sq cable (pair) is sufficient for the 2 strings in parallel as the source is 2 x 9.7A, so less than 20Amp. Even a 4mm is enough but yes the losses are less in the larger diameter and the given distance. In my installation I've connected the parallel strings on the roof without fuses using a connector box (self made, but I see you do get the MC4 type PV parallel connectors). It then passes through a single fuse and 30Amp Isolator switch before it goes into the Inverter. The 32amp fuse is sufficient, as stated the current will be below 20amp and less. (I do run 2 Inve
  11. Thank-you, I was wondering yes! The update to 71.82 went well - all seem normal and stable this morning.. Although now it is snowing (possibly just 'ice rain') in the Free State - go figure! But the PV is doing well, still charging (slower) and supply load through the clouds - no experience with other panels but the Canadian Solar performs well during overcast conditions. Will monitor.. I agree with the ICC issue, I monitor my batteries manually now and use WatchPower, at least to identify faults.. Kind Regards!
  12. "Wat jy meet is wat jy weet "! Thanks @pierre. I will keep an eye on your posts. Would love to get a Pi in future and learn - the complete 'plug & play' set with ICC is now above R3000 and I am not sure if that is worth it.. I am going to Flash my 2 inverters tonight or tomorrow with the 71.82 version. (I am still on the Old 71.50!) Since I took measurements it turns out I am suffering from the premature float issue. I am using 52.5V Charge and 51.5V Float values (15s LiFeP) - thanks @plonkster I have learned a great deal from your posts and the 'correct but low as possible' sett
  13. Hi @Pierre and all After measurements using WatchPower ("no cloud, poor sample rate - put laptop in 'no sleep mode' and export to Excel" method).. the output Voltages on my 2 parallel Axperts inverters do seem to be stable at around a 1% fluctuation, for this day at least. The batteries were below 47V (setting 12, to give app. 20% left on the LiFe's) just after 6am so the inverter switched to line (grid) mode. The rest of the day consisted out of battery charging (20Amps x 2), app 1kW from each array.. back to battery mode just before 9am..and normal home loads (washing day)..
  14. ..one thing I do not have is good monitoring software! Are you using ICC on the Raspberry Pi? My first installation (2019) is 12 x 330W Canadian Solars, the array is two parallel strings of 6 in serie each. I have now added the second inverter with 8 x 360W Panel array all in serie to the second inverter - running in parallel with the first Axpert. Hats of to the mppt chargers referencing different input voltages (223V DC on the one and 317V on the other), and still maintaining equal power drawn. When the load exceeds the capability of one of the PV arrays, then only will the fi
  15. Thanks @Coulomb! Pierre, just to make sure, do you have 2 PV sets consisting out of 9x 360W Panels in Serie - 1 set per Inverter?
×
×
  • Create New...