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FixAMess

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FixAMess last won the day on September 28

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  1. You need to check the DIRECTION of the power, the inverter will always push/pull a small amount of power from the grid, usually around 20W-100W. It does this to "align" with the grid Frequency and voltage. My 5kW inverter draws 45W from the grid when there is no sun but always pushes back/draws a small amount when there is PV.
  2. If they are Pylontechs then I expect that the max 74A charge rate will never be allowed by the BMS. I have 4X pylontechs, I've never seen more than 70A charge...Its not a 1C battery, the inverter allows max 100A charge.
  3. You did not mention what you want to achieve, daylight energy saving or add backup functionality (batteries) only? If only daylight (when the sun shines) saving then consider the following THUMBSUCK MAX cost; Inverter 8kW = 35K Sunsync as suggested by you.. Panels +-10kW = 65K All the bits and bobs R25K Installation R25K Max = 150K...Add batteries (Minimum number to match inverter, probably 14kW) add another 85K (pylontech etc). Budget is usually the deciding factor as to how big you want to go..A Sunsync 5kW install will cost probably R100K but you will then have less power generated. So, one can see that there is a vast range of possibilities. As suggested read through some of the threads and then decide just what you want to achieve and then decide what your budget is, then you can look at optimising with cheaper inverter/batteries etc. and then ask questions, you will be inundated with real world experience responses. Then finding a decent, reliable installer is required, get a quote or 2 and then take the plunge....
  4. Google - Technolgy "disruption"....Sunsync is disrupting Victrons market. The older, more established product, Victron, is well developed, tried and tested and provides comprehensive functionality...at a price, which people are prepared to pay for based on the functionality and perceived quality. They focused on niche functionality that is really for a niche market (not required or used by everybody)... Along comes Sunsync, which is much cheaper, with a more "home user" market that is very quickly gaining on the Victron functionality space as well.. Do a simple price/functionality comparison (compare only the functionality you require) and you will see that the Sunsync wins hands down. Victron installers like the rpoduct because they can maintain/monitor the victron setup remptely (apparently a HUGE selling point) but Sunsync will do this as well very soon (in beta testing, I beleive) In the next 12 months I'd like to compare sunsync installs vs Victron installs. For ease of use, simplicity, local (end user support) I'd go sunsync any day, based purely on price/functionality/support availability (and I have a Goodwe!)
  5. Have you tried discharging it down to 80% DoD, then recharging. Might help?
  6. Second life cells, not compatible with other brands, looks ugly, not mainstream...He's having a bad hair day, he's lost trust in the product...Who knows, is it our business to interrogate him???
  7. I've got some bad news for you on the PV production front. In summer, the panels get hot and reduce their output, but you do get longer sunshine hours which helps. I find that September is my best month for PV production because we get good sunshine and its cool! In summer in JHB we get rain, cloud etc so summer months are actually not that great, Spring is best.
  8. Is it really advantageous to upgrade the 300A/B firmware, what does the upgrade do/improve things?
  9. I'm not sure how much difference the extra 5% makes on reducing battery life over a 10 year period, go to battery view and read all the info, its really good. Their view is probably based on a purely scientific basis, so it might not be practical to only charge to 95%. Your BMS should prevent stressing etc but who knows, the battery and BMS technology changes so quickly maybe the newer BMS's don't stress the batteries. My BMS takes the battery to 100% but then discharges it to 90% every day so its never kept at 100% for an extended period. If you feel it will make a difference then make it 98% for e.g, just not 100%.
  10. So they repaired it, it still has its warranty of 5yrs right? They seem to be pretty reliable units so I would not stress if I were you.
  11. From battery university; Ideally, you should never fully charge (100% is a no-no) or discharge your battery, charge to 95% and then discharge to max 90% (DoD). High heat and fully charging/discharging a battery is what kills it. The additional 5% from 95 to 100% charge is what stresses the battery. Keeping it at 100% for extended periods is also not good. The only device I have found that allows me to prevent a battery from fully charging is my Dell laptop, I set it to charge to a max of 95%. The Goodwe / Pylontech setup charges the battery to 100% but then insists on discharging to 90% every day, at a minimum, if you are running in general mode.
  12. In all fairness the supplier will have to investigate and make sure the equipment was not abused/installed incorrectly before replacing it. I imagine this takes time but they should have at least communicated the process and timelines involved. One hopes Sunsync has that capability in SA. The process should be published and available to all end-users for following up on issues. I had the same issue with another brand, 3 weeks later I got the replacement, BUT I did chase, follow up, send emails etc....
  13. Why would you want to do that? The BMS is supposed to manage the charge rate as per the Pylontech recommended specs?
  14. My consumption is 900kWh/month. On a 5kW inverter with 6kWpv I generate about 23kWh/day average over a year in JHB. I'm not sure what the price difference between a single phase 8kW inverter (Sunsync) is vs the 12kW 3 phase, but I imagine the difference might pay for you to convert to a single phase...Just a thought, although you seem to be dead against that. With a single-phase and separation of your load into essential & non-essential, the 1 battery will suffice in the short term.
  15. The Goodwe is only rated to provide 4.6KW from the battery source, so if you want more you will need to get a different inverter. The most I've ever seen mine draw is 92A from a possible 148A allowed by the BMS/battery pack. Remember the Goodwe is a hybrid, so if you require any more that 4.6KW then the Goodwe should take from the power utility, of course this is only true when the utility is up, if there's no grid supply/utility then you can only draw max 4.6KW.
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