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FixAMess last won the day on February 11

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  1. How many pylontechs can you run in 1 stack? I read one has to buy another piece of equipment if you go more than 4 batteries?
  2. Firstly, batteries are the most expensive part of a PV system, so they're not economical when compared to grid...Unfortunately in SA we need battery backup. I cycle my batteries to 50% DoD every day, starting at 4pm till they get discharged to 50%..It does not make sense to buy batteries and then not use them.....You just need to make sure you don't punish the batteries by discharging too quickly. I have pylontechs, they regularly push 4kW into the inverter from 4 x 3000C batteries.. I hope they will last 10 years by which time the price of batteries will drop significantly.
  3. So you're in Germany? I've never seen the "charge during night time" flag, where on the app do you find it, sounds like its a nice feature. Im on version 1212112....
  4. Its normal behaviour, if the load can be provided by the PV, not to use the battery, battery charges first on any excess PV after load is satisfied. Have you set the minimum depth of discharge (DoD) for on-grid and off-grid ? It will only discharge to that level and then stop when the grid is up. Is your country setting set to SA? Have you added your battery as "self define", are you sure the specs for charge are correctly set?
  5. The most NB question we need to ask you is who is going to install the solution for you? They will work out how many strings etc are optional taking into account your roof space and direction. Here is a good summary of what how he will arrive at the optimum solution for you..(I copied it from somewhere, no reference unfortunately). VOc as a function of Temp. As temp decreases, V increases. We want to calculate the maximum Voc for a panel at the minimum temp we expect in the region. So for JHB we use 0’C, in Bloemfontein we use -10C. To calculate string length (
  6. These cables come with each battery, you should not have to buy separately..
  7. Irrespective of the capacity of the inverter to supply 100A to the batteries, what is the spec for the battery BMS, will it allow 100A ? The pylontechs only allow C/2 +- 5A, max. I have 4XUS3000's, 147h, max charge rate I've ever seen in 18 months is 80A = 3840W and 95A draw for a short period (dont ask, but it has to do with a hairdryer and microwave).. Also what is the max draw your inverter can take from the batteries? Take that into account then decide how what cable you need...
  8. Frankly, I'm impressed that you got the automatic winder to work and that's probably the smallest part of the entire concept/product..Pure genius!
  9. Generally, For best longevity, for LiPo chemistry, never discharge to Lower than 20% State of charge (some can go to 90% DoD)or charge above 90% and keep at 60% for long term storage...Otherwise charge, discharge as much as you like. Heat and high charge 90-100% kills the battery...Saying that my pylontechs always charge to 100% as per the BMS. Also keep charge, discharge rates (Amps),DoD, max voltage etc in line with battery specs. Go to batteryuniversity.com to read further.
  10. Yes, due this month, April..
  11. Look over the 15 yr lifespan, not the money you are paying now... Pylontechs have been tested, the other batteries you mention have not done as well as the pylontechs in the same test (If they were tested at all).
  12. Remember, the 31amps is DC (Battery which is at 48V), so is only 31Ax48V = 1488W (which is not much), the 6900VA (@230) you mentioned is AC current... 6900VA DC at battery would = 143A at the battery which is highly unlikely, since the Goodwe can only draw a max of 100A from the battery (as per the spec sheet) 1488W @ 230 V = 6.5A DC current....So you went from 31A DC to 6.5A AC, the different voltages then account for the power delivered being the same. Frankly, your inverter should have coped with the 31A Battery draw, unless that was the draw just to turn the mWave lights on
  13. Save yourself the trouble and get pylontechs...More reliable in the long run...Proved in AU tests, also seems to have lower rate of fade than the others
  14. ok, so the inverter aux is only connected to the geyser and the geyser is NOT connected to the grid? I suppose you could put a change over switch to allow for Aux off, grid -> Geyser when there's no sun! On my Goodwe, my geyser is on the non-essential side, but I understand that it gets fed from the inverter when I export to "home"...Not sure how it works...If theres no sun then the grid feeds it.
  15. Am I correct in assuming that your geyser is already on the essential side or you do not have a DB essential, non essential split? How do you stop feeding back into the grid from the aux port when the geyser is connected to the non-essential -> Grid? I.e. how do you separate the geyser from the grid when using the aux port?
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