superdiy Posted March 3, 2016 Share Posted March 3, 2016 2 minutes ago, The Terrible Triplett said: What are you talking about? I never posted that. Which sentence? Quote Link to comment Share on other sites More sharing options...
Guest Posted March 3, 2016 Share Posted March 3, 2016 4 minutes ago, superdiy said: I LOVE that heatsink, but how many watts does that thing dissipate? More than your daily PV generation? Works very well in winter and now I know why last year was so hot. Quote Link to comment Share on other sites More sharing options...
viper_za Posted March 3, 2016 Author Share Posted March 3, 2016 okay this makes it so much easier to understand now, when I have a gap I will select components and create a wiring diagram all the way from the batts to the geyser Quote Link to comment Share on other sites More sharing options...
superdiy Posted March 3, 2016 Share Posted March 3, 2016 2 minutes ago, viper_za said: okay this makes it so much easier to understand now, when I have a gap I will select components and create a wiring diagram all the way from the batts to the geyser Feel free to ask before you buy anything. viper_za 1 Quote Link to comment Share on other sites More sharing options...
viper_za Posted March 3, 2016 Author Share Posted March 3, 2016 8 minutes ago, superdiy said: Feel free to ask before you buy anything. Will do thanks My friend also just sent me a whatsapp video turning the bmv relay/contact on and off connected to multimeter showing 0 volts. It is actually just a damn smart switch Quote Link to comment Share on other sites More sharing options...
superdiy Posted March 3, 2016 Share Posted March 3, 2016 3 minutes ago, viper_za said: Will do thanks My friend also just sent me a whatsapp video turning the bmv relay/contact on and off connected to multimeter showing 0 volts. It is actually just a damn smart switch Yes, that is it. Quote Link to comment Share on other sites More sharing options...
Mark Posted March 3, 2016 Share Posted March 3, 2016 The internal relay can handle 5 amps maximum at 230 volts, as long as the current is below 5amps. Interesting - manual says 60V @ 1A Quote Link to comment Share on other sites More sharing options...
Chris Hobson Posted March 3, 2016 Share Posted March 3, 2016 1 hour ago, The Terrible Triplett said: Seriously, can we get consensus on what is the best relay to use on a BMV to switch on geysers, stoves, poolpumps and anything else you want, that is smaller? https://www.robotics.org.za/index.php?route=product/product&search=Solid+State+Relay+&description=true&product_id=1335 And if I find ONE person using a Finder ... .So a BMV driving a 230V contactor. They need to change their manual Quote Link to comment Share on other sites More sharing options...
Chris Hobson Posted March 3, 2016 Share Posted March 3, 2016 1 hour ago, The Terrible Triplett said: DELETE please. I have to agree with TTT this has been the biggest waste of time - Plonky Blue Power gets -10 points for manual inaccuracies. Mind you, I need to wind my neck in, Voltronic would be minus so many points they would not be allowed to play. Quote Link to comment Share on other sites More sharing options...
Guest Posted March 3, 2016 Share Posted March 3, 2016 4 minutes ago, Chris Hobson said: So a BMV driving a 230V contactor. They need to change their manual I did mention such to them. But, if it was me, i would keep it on 60v/1a to keep people like me away from tampering too much. Must say, after all this, suffering nearly 10 near heart attacks, I am quite the happy chappy re. the BMV relay now ... and my Finder relay's. Victron just builds good stuff. Quote Link to comment Share on other sites More sharing options...
Guest Posted March 3, 2016 Share Posted March 3, 2016 Chris, what I find very comforting is the speed at which Victron got back to me, today and on previous occasions. That gives them +20 in my book, 10 more to contra your -10. Quote Link to comment Share on other sites More sharing options...
viper_za Posted March 3, 2016 Author Share Posted March 3, 2016 40 minutes ago, The Terrible Triplett said: I did mention such to them. But, if it was me, i would keep it on 60v/1a to keep people like me away from tampering too much. Must say, after all this, suffering nearly 10 near heart attacks, I am quite the happy chappy re. the BMV relay now ... and my Finder relay's. Victron just builds good stuff. Okay let's see if I understand it correctly. I think the 60v they have is correct and what it means is you can run up to 60vdc through the BMV relay This example uses 12vdc Quote Link to comment Share on other sites More sharing options...
Chris Hobson Posted March 3, 2016 Share Posted March 3, 2016 1 hour ago, viper_za said: Okay let's see if I understand it correctly. I think the 60v they have is correct and what it means is you can run up to 60vdc through the BMV relay This example uses 12vdc Perfect maxomill 1 Quote Link to comment Share on other sites More sharing options...
Noobie Posted March 4, 2016 Share Posted March 4, 2016 Awesome thread Be sure to put an in line fuse on the red cable in your drawing before it enters the BMV. Just to protect the cable and BMV contact. superdiy, viper_za, ___ and 1 other 4 Quote Link to comment Share on other sites More sharing options...
Carl Posted March 11, 2016 Share Posted March 11, 2016 Just been reading the Victron Quattro Manual that I downloaded some time ago and there i saw the following info on the relay in question: "5) Programmable relays which can be set for general alarm, DC undervoltage or genset start signal function AC rating: 230V/4A DC rating: 4A up to 35VDC, 1A up to 60VDC" So Victron gets its 10 points back? ___ 1 Quote Link to comment Share on other sites More sharing options...
Chris Hobson Posted March 11, 2016 Share Posted March 11, 2016 2 hours ago, Carl said: So Victron gets its 10 points back? Grudgingly - so it would seem the same relay is inside the BMV and Quattro. Just they fail to mention it in the BMV manual. ___ 1 Quote Link to comment Share on other sites More sharing options...
viper_za Posted March 11, 2016 Author Share Posted March 11, 2016 1 hour ago, Chris Hobson said: Grudgingly - so it would seem the same relay is inside the BMV and Quattro. Just they fail to mention it in the BMV manual. back to minus 10 it is then for the BMV manual ___ and Chris Hobson 2 Quote Link to comment Share on other sites More sharing options...
viper_za Posted March 11, 2016 Author Share Posted March 11, 2016 Okay, finally had some time to go through this. I decided to add a small DB to be installed next to the geyserwise controller to house the relay and the CB for manual control on bad PV days 1 Geyserwise controller + thermostat: http://www.geyserwise.com/products/geyserwise/geyserwise-tse 2 Geyserwise 1500w element: http://www.geyserwise.com/products/elements/1500w-ac-element 3 Relay: http://za.rs-online.com/web/p/non-latching-relays/7083184/ 4 Relay DIN Rail socket: http://za.rs-online.com/web/p/relay-sockets/2723137/ 5 Relay Isolation coil to contact: http://za.rs-online.com/web/p/products/6668019/?sra=p&r=t You will see that the Thermostat will always have power as this will ensure the geyserwise does not give an error. What I can also probably do is connect the normally closed cable from the relay to the underside of the CB saving some work. Please let me know what your thoughts are on this Quote Link to comment Share on other sites More sharing options...
SilverNodashi Posted March 13, 2016 Share Posted March 13, 2016 The BMV relay can handle 60V, 1A. I use relays like this to drive 220V, 5A pumps directly from an ardiuno: http://www.communica.co.za/catalog/Details/P1651500292 This one can handle a 220V, 10A load. I guess, if 10A isn't sufficient a similar PCB design can be done with a 20A relay instead. If you open up the geyserwise boxyou'll find a similar relay inside, switching the geyser element on and off. Get the product code and let's build a small PCB for it, should cost maybe R100-R200 Or you can use a Solar State relay instead. It's just much more expensive. Quote Link to comment Share on other sites More sharing options...
Valken Posted March 15, 2016 Share Posted March 15, 2016 Hi Guys, I am no electrician, but... What exactly is the function of the GeyserWise? Does the geysers existing thermostat not control the temp? And can we not use a timer to ensure it only gets power between certain times? Or am i sitting the pot miss here? Quote Link to comment Share on other sites More sharing options...
MaurizioZA Posted March 15, 2016 Share Posted March 15, 2016 I just discovered an interesting device: http://ginverter.com/html/2016/01/29/20160129030223580003188.html Growatt Solar MeBoost The Solar MeBoost is designed to be used in conjunction with solar PV system, where surplus energy generated canbe stored within a domestic hot water cylinder in the form of hot water. No idea of cost or anything more than I read in this page. However tomorrow I have a meeting with these guys and I will ask more details. Another but unrelated cool gadget: http://ginverter.com/html/2014/01/16/2014011601132644293434.html Quote Link to comment Share on other sites More sharing options...
viper_za Posted March 16, 2016 Author Share Posted March 16, 2016 Had a look will not work with the Axpert but it looks like a good idea Quote Link to comment Share on other sites More sharing options...
MaurizioZA Posted March 16, 2016 Share Posted March 16, 2016 On 2016/03/15 at 10:50 PM, MaurizioZA said: I just discovered an interesting device: http://ginverter.com/html/2016/01/29/20160129030223580003188.html Growatt Solar MeBoost The Solar MeBoost is designed to be used in conjunction with solar PV system, where surplus energy generated canbe stored within a domestic hot water cylinder in the form of hot water. No idea of cost or anything more than I read in this page. However tomorrow I have a meeting with these guys and I will ask more details. Another but unrelated cool gadget: http://ginverter.com/html/2014/01/16/2014011601132644293434.html I followed up at the Solar Show. Growatt Solar MeBoost is not in production yet. At Growatt stand they did not know much about it except it will only work for the grid-tied inverters. "Good" I said "then they will work with your Growatt 3000HY, Growatt 5000HY and Growatt 10000HY (which are equivalent re-branded Infinis but at double the price)" they replied they wouldn't since the hybrid are not grid-tied. I showed them their brochures stating that these are grid tied and then someone said "maybe but the Solar MeBoost is very expensive". How expensive? Nobody knew. Upon inquiring about the "cool gadget" I received similar answer. I gave up. These sales people have no clue. When I have have time I will follow up by mail. Growatt was a frustrating and depressing stand. No comment about Tesla. Interesting stand at Must where they have released their Axpert clone with a grid-tied option. Good value for money for a 4Kw grid-tied but the 145V max PV and the 3000W solar charger are the limiting factors. I managed to convince a friend that an agreement to stock Oliter batteries was worth a try: he will be running tests to check if those impressive specs (13 years expected life, 572 times 100% DOD) match reality. Although slightly worse than Lead Crystal those specs are still very impressive and the batteries look sexy I am happy that Oliter engineer has recommended battery values to enter in the Infini set up (which they also use in their "Energy Storage Systems"). I used them last night and they worked much better than what I had previously used (but I still have to re-calibrate the inverter battery values). Interesting day Chris Hobson and superdiy 2 Quote Link to comment Share on other sites More sharing options...
viper_za Posted March 17, 2016 Author Share Posted March 17, 2016 On 3/15/2016 at 10:37 PM, Valken said: Hi Guys, I am no electrician, but... What exactly is the function of the GeyserWise? Does the geysers existing thermostat not control the temp? And can we not use a timer to ensure it only gets power between certain times? Or am i sitting the pot miss here? Hi Valken Yes it is like a timer but with more control and safety features. The Geyserwise uses it's own thermostat replacing the existing one you have. Just a few features that stand out Clear display of water temperature, time, day, heating mode and malfunction conditions (nice to not guess the temperature) Easy temperature setting to your requirements (30 - 65°C) (no need to climb into the roof) Four different temperature settings (different temps for different times of the day if you want to) Daily programmable timer with four time settings (Not sure if the normal timer can also have 4 schedules a day) Electronic thermostat with mechanical thermal cut-out at 90°C. Dry heat detection - empty cylinder. (happened to me before) Temperature probe failure detection for tank Auto or manual heating. +-R800 for the controller and thermostat. Hope this clears things up a little Thys MaurizioZA 1 Quote Link to comment Share on other sites More sharing options...
MaurizioZA Posted March 17, 2016 Share Posted March 17, 2016 viper_za, great feature description. only the obvious one is missing: can start / stop geyser manually (but next timer cycle will resume timer) or switch off geyser without going to board or isolator. After installing heatpump (using exising geyser for storage) Kwikhot installer put timer on 1min/day to protect magnesium rod inside geyser from quick corrosion. Manual start / stop is useful to easily resume geyser operation should heatpump enter an error mode (example: when filter needs to be clean) and daughter starts screaming before I had a chance to resolve error because she wants HOT WATER NOW ! 2 hours ago, viper_za said: The Geyserwise uses it's own thermostat replacing the existing one you have. ... if you have certain older models of geysers. For some newer models (example: my Kwikhot) replacing is not required since GeyserWise can use existing thermostat viper_za 1 Quote Link to comment Share on other sites More sharing options...
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