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Thank you for the great forum, Safe Driving over the weekend. Sincerely Jason

PJJ

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PJJ last won the day on February 10

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  1. I guess you could also ad a 4) Keeping capacity spare in case of a unplanned unit trip, preventing entire grid collapse.
  2. I see a similar problem already with water. If like me, you happen to live in a high laying area, pumps are also used to keep your taps at pressure, of course our municipality is so bad at maintaining this pump that for the past 3 years (I have only lived here for 3 years) its steadily gotten worse we now only have water for around 6 hours a day, and some days not at all. (Our record last year over December was 8 days!) So everyone in my neighborhood does have a 5000L holding tank to carry us through. (See our tanks as batteries and the Municipal pumps as the grid) Instead of the municipal pump coming on and only getting everyone's homes back to pressure, we are all putting massive strain on it by refilling our tanks (I mean we are not going to go without water), so when it is actually working it is being pushed to 100% capacity for hours, and so the vicious cycle repeats.
  3. PJJ

    Similar Inverters

    That is why I said: They are the only true Hybrid inverters in the Voltronic range. I think I just chopped my sentences badly there, I wanted to point out, that even tough the Voltronic models all have MPPT's as well, all wrapped into one package, it does not make them Hybrid inverters. (Excluding the King and Infinisolar models)
  4. PJJ

    Similar Inverters

    Grid tie inverters do AC-Coupling, so they need a sinewave to couple to, thus no mains no generation or backup (They can however be used downstream from a inverter that can provide it with a sinewave to couple to, they do this with frequency shifting) Well not necessarily, Off grid could also mean, no AC Input, since its "Off grid" meaning no AC power close by. E.g (Victron Phoenix inverters, they could be seen as "Off grid" inverters) Here is where I think the misunderstanding comes in, a Hybrid inverter isn't necessarily a all-in-one solution, its a inverter, that has the ability to blend power from a DC bus with AC to supply a load, the fact that a Goodwe unit happens to ship with a MPPT doesn't make it a Hybrid, Voltronic units (Baring the King and Infinisolar models) all ship with MPPT units built in, but they can't be seen as Hybrids because they can either supply power from Only the DC bus or Only grid power, they have no ability to blend power.
  5. Neither will the International Criminal Court. But this will, I seem to recall forum members on here switching relays based on data they receive in ICC
  6. I am not sure how you would do that with a Voltronic, but with a Victron setup you can get system data from the Venus via MQTT, dump that into Node-red and off you go. Mine switches off some loads instantly if the grid fails, and some I switch off below a certain battery SOC, but they are all on my "essential" side. I would assume you could do a similar thing with ICC?
  7. Sure it can be done, but if you bought a Victron Multiplus you would not have to worry about any of it, you could throw all those loads like Geyser's, stove etc on the AC2 out from the Multi, while keeping your essential loads on AC1 out. The Multi would then happily feed them with solar power when the grid is active, but if the grid falls away they go off and not need to worry about them discharging your batteries or overloading your inverter.
  8. 1- Goodwe is also a Hybrid, Only the Axpert King can be considered a hybrid and there is also some caveats to that. 2- I have never (locally at least) seen a single 5KW+ inverter that was not a Inverter Charger (Not necessarily a Hybrid but grid interactive) @plonkster has a great way of explaining this. Its nice however having a Inverter with a AC charger, most of the real off grid setups I have seen all had a small generator close by to help charge batteries in winter / bad weather. Buying batteries for those 3-5 days a year of miserable weather is not economical. The problem is common sense is not that common -Voltaire So you could do load control, I do exactly that at home to protect my small multi's, but I have no idea how this could be done in the Voltronic world. I don't think the kind of install where you are planning on discharging 7KW+ Is going to be the one where people are going to pinch penies over R10K-R20K for a better inverter. 7KW worth of discharge is 4 Pylon's already. so that's R80K on batteries alone. Sadly it seems like no, Its Victron/SMA/Goodwe at the top, Voltronic at the bottom and nothing really in between.
  9. Your only options I can think of are : Victron 8000VA Quattro - More expensive, also no MPPT if that is what you wanted in (a larger load in one package) Sunny Island 6/8H - More expensive, also no MPPT if that is what you wanted in (a larger load in one package) Sunsynk 8KW - I have no idea what these go for R30K?
  10. Yup, Peukert, inverter and battery losses are often not taken into account, and also very often omitted is inverter self consumption, which can also be quite a load on some models.
  11. Ryan if I where you I would buy a single US3000 now. In terms of price it would be the same as the 48V 200Ah Lead acid bank (It might even be cheaper when you consider the added components like Balancers and a BMV) Drop the Aircon for now, keep powering your other loads, where a single US3000 would be more than sufficient. Save up and when you buy your second module you can add the aircon back into the mix. If you do 50% DOD cycles I can't think of many LA banks that would give you more than 700-1000 cycles with that usage. Seeing as a loadshedding event could = 1 cycle (Not a guarantee of course single load shedding could happen while you don't have high loads actually taking it down to 50%) If we go with the conservative estimate of 700 cycles at 50% DOD, if we had daily stage 1 load shedding, your bank would need to be retired after only 2 years. Sure daily loadshedding for 2 years on end might not seem likely now, but its entirely a possibility.
  12. If you tally up the other losses: 2.1KW AC = 2.3KW On the DC bus (92% inverter efficiency) and 2.7KW from the battery (At 85% battery efficiency) So that's 5.4kWh Also discharging at that steep a rate (4 hour rate essentially) will mean his batteries won't be 200Ah, more like 150Ah-180Ah. Unless of course they are rated at 200Ah at a 4 hour rate, but most of the batteries I have looked at are rated over 10 hours, and the real cheats give 100 hour discharge ratings.
  13. Ahh yes, those one movie wonders, like Ghostbusters
  14. I ruined my wife's day once when I informed her that Celine Dion: All By Myself Is actually from Eric Carmen.
  15. Yes, at R6/kWh it really would be a very easy decision. I would actually not mind a TOU tariff, it would send the right market signals to end users that electricity is scare at certain periods of the day and abundant in others, this would allow for a much better use of resources I think.
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