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Everything posted by Craigm

  1. You aren't really comparing apples with apples. Assuming you're talking about the geyserwise pv kit, this will generate more power to heat your water. Your listed alternative is another battery, which is storage. If your objective is to save more, get a water heater. If it is to run your house off battery for longer, get a battery. It's not worth it to heat water from a battery. Personally, I'd add more panels and heat your current geyser through your new system.
  2. The way I understand how this system works, is that it uses the DC element when there is PV available. The DC element would not be reliant on AC. Maybe someone who has experience with the system can comment.
  3. Agreed, real time would be great. The only time I would want to change settings, is if there was a combination of a long term outage, bad weather, and not being at home. But for now, the happy to let the inverter do the work.
  4. Bull 6.4kWh. I just prefer to step it down gradually over the course of the evening, to make sure there is enough capacity for a longer term outrage. But his night time idle load seems pretty low, so it should be sufficient. It's all trial and error at the moment, as long as we get the basics right. He changed soc to 75% and caught it there, battery stopped discharging as expected.
  5. Thanks! So then it's about managing the SOC throughout the night.
  6. Firmware was updated on Friday. We were trying to get the house in the pic, as the panels were not powering the non-essentials as expected. We managed to get that sorted, but now it's chewing the battery. Help
  7. A buddy of mine has just installed a 5kW Sunsynk with a Bull battery. We've been adjusting settings totry to optimise the system, but have run into a problem. The batteries are powering the whole load, including non-essentials. He has a prepaid meter, so is not feeding back into the grid. Attached is a pic showing the loads and another showing the system settings. However, priority load is now ticked. Any ideas on what setting to change?
  8. Very exciting this!! I'd be keen to give the BETA dongle a go! Does anyone know how to get hold of one? Any installers that I could arrange to get one from, when they arrive, please?
  9. They are compatible and work well together. I have the 8kW inverter and 2x US3000C (one of which I bought from them, which I regretted after my installer got my second one for cheaper). They probably don't mention Sunsynk as they rather punt their own rebranded version of the inverter, called the "Fusion".
  10. I guess I'm lucky I didn't see smoke. Didn't trip either. Wife was baking
  11. Here is a picture from the TSE manual. The old models didn't have this (my dad's TSE doesn't have this) but the two units that I bought over the last 2 years work like this.
  12. I agree with the logic of heating the water just before you're going to use it. So if you know you're going to be using the grid to boost the temp, I think your logic is sound.
  13. Well I call BS on point 2. I have the data and savings to prove it worked in my case. Anyway, don't want to derail the thread. I use a geyserwise and heat the water to the required temp that I only need hot water in the shower. Call it 44 degrees in the morning for me, 50 in the evening for the wife and kid. Sunday I pump it up to kill the bugs. This is the advantage of the geyserwise over a timer, you can set different temperaturea at different times of the day. My objective is to decrease consumption, not utilize excess pv. Different objectives will result in different solutions.
  14. Craigm

    PV Loss

    I am currently maxing out on about 80% of my installed capacity. Actual numbers will depend on variables, such as the roof pitch (my pitch is quite steep). Also some days are just better than others.
  15. I smelt the cookies, no smoke. I jumped on the app an hour after this peak, didn't even realise it. I was in a meeting at the time. Most of the load was on the non-essential side (ovens, pool pump, kettle) but there was also a fair load on the essential side (dishwasher, washing machine plus normal idle load). I love it when my wife gets in these moods (bake and clean), I just wonder when we'll see the smoke. (I am sure the system would trip if it wasn't happy, but so far so good).
  16. I just got a little shock. Wife is baking (apparently for some massive party I don't know about) and pulled 12.77kW at one point. I have a 8kW Sunsynk inverter and panels were producing about 3.5kW at the time.
  17. I've only had my system for just over 2 months, but I will share some of my learnings with you. The more experienced guys will correct me and fill in the gaps where I can't answer. 400kWh to 1800kWh is a big swing, which I assume means you pull a fair bit at once with the heaters. You will be limited in passthrough amps with the inverter (there is a Sunsynk thread that discussed this recently). I wouldn't recommend you install these circuits on the essentials side of the inverter, as they will trip your system when the grid does down. The reason for this is that the batteries can only supply a certain amount at a time. Your proposed batteries will limit you to about (conservatively, call it) 3kW load. This means that a load exceeding 3kW when the grid fails will trip your system. This will be additionally complicated if your geyser is on essential load side. At a minimum, you would need a geyser timer/management system to balance the peak load. My gut feel here for your proposed kit - you will have to assess your peak loads, possibly needing to reduce them and / or add more batteries. Your proposed kit will fly in summer, but I have my doubts about winter with your proposed configuration.
  18. Doing the quick maths on a quick google search for wind turbines - assuming you can spin it at full capacity, call it 1500 minimum hours to break even just on the wind turbine. Happy to move this one to file 13, just not worth it.
  19. I have a bicycle and an indoor trainer. Would it be worth it to rig up a dynamo to the sunsynk aux port? It would work like a wind turbine, but powered by pedaling. I might train a bit more if I saw $ returns! Google doesn't show much, except for 100w versions, which isn't worth the effort and cost. Worth it, or file 13?
  20. Thanks Achmat. I understand that for the daytime run. But how does the nighttime run work? I dont want to run batteries down to power the geyser, I'd rather pull from the grid. If that's possible.
  21. Correct. But when the grid is down, the generation is limited to the consumption on the essential load only, which means 4kW generation potential pushing out only 300W and the rest being "wasted". When the grid is down, it only powers the essential circuits. My question is specifically around the scenario when the grid is down. I currently run the geyser from 12:00 and 14:00, whether there is sufficient PV or not (pull from grid if there's a shortfall). But if the grid is down during this time, cold shower for wife and cold shoulder for me!
  22. I have been running my system for a few months now. - 8kW Sunsynk inverter -5kW array - 2x 3.5kWh pylontechs A generator changeover switch was installed in the house already, so I just had this routed into the Aux port. In hindsight, not worth it as I haven't needed to run it at all and I wouldn't mind taking it out if necessary. I also have a geyserwise controlling the electric geyser (3kW). Geyser is connected to the non-essential side of the DB. We've had some power cuts over the last few weeks which left me with cold water at kid bath time (wife was not impressed). With loadshedding again this week, I run the risk of not having hot water if the grid is down when my geyser is scheduled to run. Yet I "throw away" plenty of power that I could be pumping into the geyser. I have done some reading and consulted the manual, and it seems like the aux output might do the trick. However, I am not sure how to go about setting it up wrt the changeover switch. Is there a simple DIY "smart" solution, that will changeover depending on conditions? Or change it manually, but remotely? For example, I want to heat the geyser from the sun early afternoon (or when batteries are charged and load is less than generation), but from the grid in the early hours of the morning (or when cloudy), but I don't want to have to physically flip a switch. It must be "wife friendly" for when I am not home. Any ideas on how to approach this or what products to look at? Wifi enabled (e.g. Sonoff type device) would be ideal, but I am not a sparky or a programmer, so I need something simple. Cheers Craig
  23. Same same, but opposite. I think? Attached picture shows the slight orientation to the west. So, theoretically, I should start producing slightly later than a perfectly oriented array, but generate slightly better than average into the afternoon. I am not worried about my setup, I just like to understand how it works.
  24. I had my system installed about three weeks ago. I'm still getting to know all the intricacies, which I am enjoying. I am wondering if my PV generation graph is "normal"? Today was a good generation day without much cloud, so a good day to analyze. My generation gradually trickled up to about 300w and then shot up to 1.46kW at about 8.45am. It seems to do this daily, but today there were no clouds. At the end of the day, it trickles down, no sudden spike like in the morning. Does this sound right? System spec: 8kW sunsynk inverter, 12 x 420W Canadian Solar panels and a couple batteries. 40 degree pitch, facing about 340 degrees. No shade at all. Grid was up during the entire time in question. Attached is a screen shot of the days generation, showing the query.
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