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MYBRIDH

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About MYBRIDH

  • Birthday 05/07/1975

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    Male
  • Location
    South Africa , Gauteng
  • Interests
    There are many..............................but I seriously just dont have the energy anymore.........

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  1. Much appreciate the feedback thank you Coulomb. I will try and err on the cautious side.
  2. Good day all. Hope you are doing well. Question relates to the PSW-H-5KW-230/48V. I bought it a good while ago, not yet installed. At the time, I was under the impression that it had 2 MPPTs which it turns out is not the case. I back then bough half a set of panels for the one MPPT, not having a second MPPT as I thought, I have been hunting in vain and not able to find a matching set for the other PV input. So, I need a complete set of panels. My question is , as compared to the specs, how much PV can I actually connect to this inverter? Manual states: Max PV voltage = 450V MPT range = 120 - 430V Max usable PV Current = 22Adc Max usable PV Power = 4800W Max PV array power = 6000W To elaborate on the question: If I had two strings of panels , with 22A total Imp capability but enough panels that the voltage was at the upper end of the MPPT range at 343V, would equate to power capability of 7.5kW. Yet from both a current and voltage point of view it is within range. This though exceeds the Max PV array power = 6000W...........Should this 6000W limit be taken literally or would it generally be ok as long as the current and voltage are within stated ranges? Looking at it from another point of view, if the current capability of the PV array was such that it could provide more than the 22A but still within MPPT voltage range, would the inverter just limit its consumption or would I turn the inverter into a smoke machine? If this has been covered before, please do point me in the direction of that discussion. Thanks for taking the time to read this, answers to these questions would really help my efforts to not screw up when buying panels again. Regards Kassie
  3. Hi Coulomb. No, I am pretty certain it is a active device. I absolutely see what you are saying, and that being the case, yes ........what is the point? So the only real gains to be had would be improving your smaller / existing inverters surge handling ability to match that of a larger unit but at less of a cost of a larger unit or inverter upgrade. Device label indicates 100A, which at this time I will assume to be a peak/surge rating judging by the small gauge of wiring I see in one of the images. I will get back with more info, thanks Coulomb.
  4. True, it would add to cost space and weight. The additional PFC would be incorporated on the output though in the sense that it is connected to the loads , correcting PF so that the Inverter itself sees primarily resistive load. I dont know how susceptible inverts are to tripping or shutting down when encountering start-up currents , I absolutely stand to be corrected here but sounds though it could be quite a common issue , which if curbed may allow for substantial increase in base load. That all said assuming what I am suggesting does have merit in a theoretical sense......financial aspects aside.
  5. Coulomb, I appreciate your inputs thank you very much. Considering the numbers you provided , being able to maintain unity PF should yield considerable reduction in peak current seen by the inverter...... Certainly seems like an avenue to be explored. Does beg the question though.......if there is going to be such a benefit in the ability to curb peak start-up currents improving reliability and operation....why are inverter manufacturers not incorporating PFC's on their outputs?
  6. Hi Guys and Girls, Hope all is well. A question I have after having a discussion about a system I need to install. I have been advised to install , what essentially is a PFC between the inverter output and the loads. ( Device in question is a Turner Morris High Efficient Energy Saver. I would be interested to hear if anybody has any experience with these ........or has any alternate suggestions. Essentially a PFC so connected to households running older fridges, AC's, pumps , flourescent lights etc, I can see that there would be savings to be had, I will be looking into one of these.) The gentleman advising me to do so is claiming that the inverter will be less susceptible to tripping on start up of inductive loads (and I suppose capacitive loads as well), allowing higher base loads while maintaining reliable operation. From the point of view of the grid supply to the inverter, I assume there wont be any real change if the inverter already does PF correction with the inverter appearing to be a resistive load with a PF near 1. It does make sense to me that adding the PFC before the inverter's loads would reduce the peak current demand seen by the inverter. That being the case, we would see the above mentioned benefits, Right?....or am I missing something. Another consideration, if the added PFC unit was more robust and capable of providing peak reactive power current to the loads, doing the heavy lifting as it were, with the inverter only seeing the lower real power currents, would it not stand to reason that such a device could improve Inverters ability, reliability and longevity? Would appreciate your thoughts guys. Regards
  7. Thanks @Gerlach. I have taken a look at that BMS........assuming that is the that the Ant BMS? I would be very keen to hear how it works for you. The Orion, Batrium and Chargery BMS's look to be very complete in their development, a finished product with decent functionality (speculation ) with everything in Enclosures etc.......................and the price tag to boot unfortunately. My pick would probably be the Batrium, per my understanding a bunch of Longmons and one BMS would allow me to monitor individual cell on all of the 5 parallelled batteries. That versatility makes it very attractive. Alas it is very expensive and the Chargery, even though I need one per each of 5 batteries is considerably cheaper. At the endo of the day, I still dont quite know what I need, I am sure there are charge controllers/Inverters that could manage everything with the exception of individual cell monitoring/balancing in which case cell balancers only may be sufficient. Maybe I shouldnt be putting the cart before the horse and take another look at the bigger picture........ Much appreciate the input.
  8. Thank you @Richard Mackay, I will be sure to check out a few of his vids.
  9. Anybody have any experience with the Chargery BMS systems?
  10. @Gerlach Could you please enlighten me as to which brand this would be?
  11. Hi, Thank you Gerlach. Has there been any one product that peaked your interest? There certainly are products out there but I am hoping to also receive some insight into what might be available locally and have some proven track record among the forum members. Later
  12. Hi Mike. I much appreciate your response, thank you very much. The Batrium definitely looks worth considering. So if I had 5 of these 14s batteries (2.5kWh each for arguments sake) operating in parallel, I would need a Watchmon4 and 5 x 14 of the Longmons. That seem accurate ? The approx cost of this would be in the region ~R25K, before Shipping, Duties and Taxes. This is what confuses the hell out of me. The going rate for lithium batteries (admittedly I could do more homework here) seems to be in the region R5k to R10k per kWh. Considering the above, R2k to R3k/kWh of that cost is BMS. Am I missing something here or is that typical? To throw some more questions out there. What are typical Duties and Taxes on importing such items? Considering my financial situation i cant be too choosy. If there are any Chinese BMS that are suitable and have proven themselves locally I am all ears. Regards
  13. Hi Chaps. Hope you are well. Guys,kindly please share some wisdom with me. I have a few NMC Lithium Batteries. Essentially an enclosure and cells, but no management system. Would you be able to recommend a supplier who could help out? They are 28 Cell units, but charge voltage ~56V , I am expecting that the internal configuration though is 14 pairs of 2 paralleled cells. I will need to physically inspect to confirm . This being the case I guess I would need 14s BMS. Also, would I be correct in assuming that in general: Cell balancing and temperature protection are the most vital functions needed from a Lithium Battery Management System Over/Under Voltage and Current protection would be provided by your Charge Controller and Invert I eagerly looked up the Orion BMS's as I have seen them mentioned a few times. Almost had a heart attack when I saw the price compared to what complete batteries sell for here. Would much appreciate your thoughts. Later
  14. Thank you very much for the welcome Jaco. In a nut shell what I am hoping for is to install a hybrid system (my understanding of hybrid at least) that has the ability to : Use solar during the day to supplement our AC power usage and charge batteries Have the intelligence to regulate AC output so as to not export power to the grid (For now at least, as I understand with older meters I will be billed for power I export, and I dont know what the current situation is wrt Net Metering ) Use battery backup to supplement solar during low solar conditions but with a priority to retain battery storage to provide backup during grid outages/load shedding. If it is better from a financial and battery longevity point of view to limit battery use to only backup situations that is fine too. I have been looking at the Voltronix Infinisolar V2 range. They seem to fit the bill as far as functionality. I have many questions though. Are they available locally. Is it permitted from a regulatory point of view. (The only restriction that I know of is that the system may not feed back into the grid during grid outages) Does anybody have experience with the V2's and do they work? Another huge snag. I have s few Lithium Batteries, they are however not stand alone modules so I need stand alone BMS systems for them. I need to find these and if anybody has any pointers it would be much appreciated. In the interim I need to get a better understanding of what our actual average and max power consumption is. Regards
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