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Analytical last won the day on November 21 2017

Analytical had the most liked content!

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  1. Thanks for the reply @ebrsa. I appreciate it. I've ordered ICC Pi last night to take advantage of the Black Friday special. It sounds like I will add MQTT then soon.
  2. Thanks. I would have liked the other way to give me flexibility, but happy nonetheless. I'm trying to decide between the versions, and I have a pi lying around. What is the difference between the normal version and the MQTT one? Do I need MQTT? Thanks.
  3. Definitely on my shopping list then, Just for clarity, would it be 2 of the same version, or is it possible to get a pi and a windows version, and pay for the most expensive? I'm not sure which version i'll implement in the long run. Thanks
  4. Thanks to all who have responded so far. I've been running the system for the last few days, but I havent decided how I would like to implement it permanently into the DB. Some feedback on what I have learnt so far. I've never realised how many clouds are in the sky during the day until I started watching my PV output. Today was the best so far and I have generated around 23KWh. There is a bit of a difference between what PVoutput logs and what Emoncms logs, but I assume that to be due to the more frequent logging on Emoncms. I keep on comparing my output to @pilotfish as I think he is quite close to me, just to make sure he is also suffering from clouds and it isnt my setup acting up I've joined the SA team on PVoutput as well. Self consumption is good so far and I am able to use all PV power being generated. You can see the reduction in electricity usage in the middle of the day. The high consumer in the morning was the geyser, due to a cloudy and cold day yesterday (and kids bathing the previous night), and oven in the evening. I've got a trial of ICC running, which I find very useful, as I like seeing data being logged and being able to check up on my house remotely. I'm currently running it on a HP N40L microserver, but it seems to be getting overloaded with all the things I'm running on it, so considering getting a Lenovo Tiny PC to run these types of services on, and also my CCTV, or start trying to figure out the Pi version of ICC. The inverter can indeed run on loads above 3KW. I've also tested it whilst running from PV in day time, and it is combining PV and Grid. The overload indicator lights up, but no alarm sounds. This makes me think I can connect more circuits to it once I let it feed into the DB, as it seems to handle load above 3KW at least for a few minutes, so I dont have to be too worried about the microwave or kettle. There has been no issues with the prepaid meter yet. I assume it is because I dont have it in grid tie mode and not trying to push back into the grid, so that works really well at the moment. I currently have the load side of the inverter going to a plug point, which I run my mining rigs off. I need to consider getting my inverter setup more permanently. I'm looking at changeover switches and surge protection devices. If only one place could sell them all! I'm trying to keep my sub-DB circuit breakers and changeover the same brand (Hager), and possibly looking at their SPDs and PV fuse holder as well. Livecopper seems to be able sell most of these to me, but I havent confirmed all parts yet. Once I've done that I'll also start thinking about the batteries. I'm trying to keep it cheap (backup power only, no real requirement for frequent cycling), but when you work it out the price difference between the cheaper option and the better quality isnt that big. Come on lithium, drop those prices, so I can rather spend my money only once. I guess that is all for now. Thanks for reading.
  5. I was able to install the 12 panels onto the roof over weekend and am now looking at how to connect the inverter. As I currently dont have batteries I'm trying to figure out whether there are specified settings / profile I should use? Grid Tie seems an obvious choice, but that would mean feeding into the grid (I think). I've temporarily connected it to the DB board but the WR warning keeps on showing on the screen. The good news is that I figured out that it can indeed handle more than 3KW load. I've pushed it up to 4.8KW for 2 minutes, but that was at night with only grid power, so I think it is in a bypass mode. Below a picture of my handywork.
  6. I know there is a saying that says you have two ears and one mouth, so you should listen twice as much as you talk, but I'm not sure the saying also holds for two hands and one head?
  7. Thanks @plonkster, though I must admit that I probably did not understand all of the above that you were hoping to convey to me. Hopefully as I learn more it will make more sense to me.
  8. Thanks @plonkster. I appreciate the feedback I've got one of those efergy wall plug watt meters and it indicates that the power factor is between 94 - 97% on the mining rigs. Not sure how accurate the Efergy is though, but overall encouraging. This is where my uncertainty lies. I've seen the Imeon 3.6 specify that it can go up to 6KW for short periods, and the Ingeteam Sun Storage can supplement with grid to way above its 3KW rated capacity, so it is pretty much install and forget, and no need to split circuits. (Ingeteam ISS 3TL 1 Play 3TL Spec Sheet) My brother in-law has the Ingeteam, but outside my budget for now. I cant imagine the Infinisolar having better features than the Imeon. I defiintely dont want to blow it in the first week Thanks, I was looking for some real world examples. I'll be putting my array on my corrugated roof, which seems to have a pitch of 17 degrees. Far from ideal for winter time, but I was also thinking that I'll just max the size of the array that I can fit on the roof and inverter instead of trying mounting structures or multiple strings (not that I have a choice with the infini). I also read his post and I am / was very worried. After rereading it again last night, I noticed that he said in his first post that the system had been working fine for close to 2 years. It was only after a few re-reads that I realised he added a "modbus comms card" after which his problems started, so if I understand it correctly, he wanted to feed some power back to the grid side of the inverter so he could use more of his generated electricity, with the Modbus sensor then measuring the current and telling the Infini when to pull back. That is the most sense I could make of it, so I am hopeful that his issues arose after the modbus comms card. @Wetkit, I would appreciate if you could confirm whether this is the case, it would make me feel a lot better. On the topic, I understand that these types of setups require a safety feature to prevent backfeed into the grid when the grid is out (anti-islanding). Is a separate device required for this? Would something as simple as this Hager do (ESC263)? Thanks.
  9. Thanks SOLARWIND. Yes, I will definitely need to block that. I just hope there won't be issues with that. Sorry to hear that your install is now missing.
  10. Hi Guys I’m looking to start my own solar install. I’ve been browsing this forum on and off for the last 3 years (I think) trying to better understand some of the concepts and to think about how I would like to implement a setup for myself. When I first looked at this my daily usage was about 15KWh a day, with most of that in the evening, so due to low usage during daytime, it required me to have a battery setup which made the whole concept uneconomical for me, considering my monthly usage was only R500. I kept on checking back every now and again to see if things have changed but kept getting back to the same answer that financially it doesn’t make sense (yet). Recently my circumstances changed and started some cryptocurrency mining, and my electricity usage is up significantly, which also means that my daytime usage is now significant. This got me thinking that I should relook at the solar option. It also happened around the time that the Renesola Infinisolar 3KW inverter went on sale at Bonanzatech. I bought one of these and I am in the process of purchasing solar panels and the mounting brackets. I haven’t decided on what I am going to do on the battery side yet. We have a weak substation that feeds our area, so the electricity trips every now and then, and some battery backup would be useful. I’ve done a fair bit of research, but now that it is getting close to the execution, I’m finding that there a lot of details I am uncertain of or just need confirmation on. I think this is a long first post already so I’ll keep it limited for now and later add more to the thread as I progress. Right, that was the intro, let me get to specifics. My goal is to use as much of the PV power generated as possible. Area: Fairland / Northcliff, Randburg. Inverter: Infinisolar 3KW (Renesola branded) Panels: 12x Canadian Solar CS6K-270P Mounting: Renusol Metasole+ The way I’m reading the spec sheet for the 275W panels, I should put the 12 panels in series (Voc 38V x 12 = 456V, which is within the inverter’s max DC voltage of 500V. Inverter:I guess most of my uncertainty is on how the Infinisolar works. It seems there are a lot of people with Axperts, but not Infinis, so information is thin. My understanding is that the Infini will combine PV and grid to supply the load (which I like, so there is less wasting of solar power if it’s insufficient to power the loads). My understanding is also that the max output is 3KVA / KW (13A at 230V). As mentioned before, I have some mining rigs in the house which gives my house a current baseload of approx 4.2KW (I’m using an Efergy monitor to track this and also on pre-paid). My thoughts are to split my DB to keep the Oven (Stove is gas), geyser, dishwasher and washing machine on the grid, and then to also move a mining rig or two to the Grid side to keep my baseload somewhere closer to 2KW – 2.5KW, so that I can selfconsume most of the PV generated during the day, but still gives me headroom when we start using appliances and lights in the house. My uncertainty is how careful do I need to be on exceeding the 3KW rating and how much can the inverter handle for short periods of time, i.e. if someone switches on the microwave, would it cope for the 2 minutes or do I need to make sure the load doesn’t exceed 3KW ever? Also, what does the PV power generation look like throughout the day? Will a 2KW baseload be able to consume most of it due to the “semi-bell shaped curve”, or will there be significant overproduction and wastage? I’m also curious on whether anyone has experience with how nicely it plays with a Landis pre-paid meter? I see another thread on an Infini and a Conlog and it doesn’t sound very positive. Thanks for reading so far. I’ll keep it limited to what I’ve written so far and add more later. Regards.