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Forum Index : Electronics : MAD/OZ AC/DC Charge Controller
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Madness Guru  Joined: 08/10/2011 Location: AustraliaPosts: 2498 |
I don't think there is any problems at startup, that has never been an issue. I need to connect the CRO when running with the Aerosharp. I did watch it with the Zeversolar and the wave was perfect except when the GTI was making the same amount of power that was being used by the house. The sinewave flattened slightly at the peaks, apart from that is perfect that it perfect at all times. Once connected I have never had the GTI drop out apart from the OGI failures. When I was using the Zeversolar it worked so well, there was not the slightest hint of any issue until it failed recently. The OGI ran quieter with the GTI running as the buzz of the toroid and choke almost completely disappeared. Listening to the OGI is an indication of how it is running and how smooth the wave is. With past issues with spikes in the waveform etc (pre GTI) there as very noticeable change in volume and sound of the OGI. There are only 10 types of people in the world: those who understand binary, and those who don't. |
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oztules Guru Joined: 26/07/2007 Location: AustraliaPosts: 1686 |
Mulver "Also your not allowing it do drop to zero, why is that? if ( pulseVal<=25) { pulseVal=25;" This is only ok for mad, as when I tried this, my float voltage was not stable..25 was too big, even one was too big if you turned the power off for a day or two.. ie holiday mode would see your voltage go sky high over a few days. Over here there are 16 units running around the place,and folks leave the island for weeks at a time, so this is very important here... not for mads situation.... so beware, you don't want to float at 54-59v or so every day while you are away... not a good look day after day. I don't care if the GTI shuts down and restarts, so I will stick to 0 now.... I want float to be a real number. ...........oztules Village idiot...or... just another hack out of his depth |
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| Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498 |
Your up about Oz, bet your glad to be mobile. I have refrigeration, computer network plus phone chargers etc running all the time so my load is never below 160W, with fridge and chest freezer compressors running it is around 360W. There are only 10 types of people in the world: those who understand binary, and those who don't. |
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| oztules Guru Joined: 26/07/2007 Location: AustraliaPosts: 1686 |
...... no she is going to kick me back to bed.... freedom has been terminated. I was only allowed up to get brekky and now to get your fets from the shed. ........oztules Village idiot...or... just another hack out of his depth |
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| Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498 |
Next, you will be in chains or has that already happened? You might find this worth a read. https://www.spine-health.com/blog/bed-rest-not-always-best-bet-beating-back-pain There are only 10 types of people in the world: those who understand binary, and those who don't. |
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yahoo2 Guru Joined: 05/04/2011 Location: AustraliaPosts: 1166 |
I am talking about when the batteries are fully charged and both inverters are idling with the barest minimum of load. Gti's are supposed to have several Anti-islanding safety mechanisms, one of those is to push against the frequency control and "test" that the stable mains connection will not be moved around by the inverter, trouble is regional settings and firmware updates make it impossible to pin down what characteristics a particular inverter will have. Manufacturers are pretty tight lipped about how this stuff is implemented. I'm confused, no wait... maybe I'm not... |
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| Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498 |
Without regulation, the GTI just keeps working as hard as it can and the battery volts just keep climbing. So with the regulation, it just drops the GTI's input to minimal or nill. So any push on the OGI it just takes the power and converts it to DC, the AC voltage remains rock steady, never seen it change more than 1-2 volts. So I don't think the GTI testing the OGI is an issue, never seen any frequency change either. There are only 10 types of people in the world: those who understand binary, and those who don't. |
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gpalterpower Senior Member  Joined: 19/07/2009 Location: AustraliaPosts: 175 |
Could this problem be attributed to the moment when the inverter is making the exact amount that is being consumed in the house. Ive noticed something similar with my system if I have that senario. I notice there is a flickering with lights if they happen to be on. Dont really notice it if I am using a microwave, fridge or any other appliance, but lighting shows it up. Definately seem a little unstable at that particular moment . Most of the time the OGI is connected to the grid , but when I need a little extra power on those overcast day I change it over to feed my off grid. Just a thought! Marcus if it aint broke dont fix it!! |
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| Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498 |
Hi Marcus, It may be the case I really don't know, with the Zeversolar the only way you could possibly know was at equilibrium was by watching the CRO. There was no noticeable flickering, apart from seeing it on the CRO and the OGI made a slightly different sound. However, what was happening with the Aerosharp I do not know. What I do know was it did not happen at lower power levels from the Aerosharp GTI. I have spent all day trying to get a working inverter using salvaged FETs, it was a complete waste of time. New FETs should arrive tomorrow or the next day. So I will get the big inverter running and see how that goes. There are only 10 types of people in the world: those who understand binary, and those who don't. |
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| gpalterpower Senior Member Joined: 19/07/2009 Location: AustraliaPosts: 175 |
It is possible to be in equilibrium at medium or higher power levels, so that could still be the problem. With the new FETs you can start afresh. Were all keen to see this work. Marcus if it aint broke dont fix it!! |
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| Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498 |
I am working it, I received FETs today and have a new power pcb almost ready. Had enough of it today, I will try to get it running early tomorrow before work. However I won't be rushing it and I am reluctant to turn it on leave it ATM. With the Zeversolar never misbehaved and often we had the clothes dryer running on a sunny day as we had the power to spare. This meant that many times it would have reached equilibrium with around 3kw load from the house especially with a bit of light cloud around. This setup just worked and had been since May, it ran like a dream. I need to connect the Aerosharp to the grid and see how it behaves before I reconnect it to my OGI. it may be quite few days before we get full sun to try it out properly. In the meantime I have the 5 KW array (2 strings of 10) connect via the regulator direct to the batteries so I can at least get some power from them as we are getting very cloudy/rainy weather. I am hoping to have another Zeversolar Inverter the same as the dead one I have now next week along with a heap more panels. When the extra panels are installed they will be DC to DC. There are only 10 types of people in the world: those who understand binary, and those who don't. |
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| gpalterpower Senior Member Joined: 19/07/2009 Location: AustraliaPosts: 175 |
Well I guess that rules out equilibrium as the problem. Sometimes its a matter of elimination and one step at a time, otherwise we can get ahead of our selves and miss finding a possible fault. Zeversolar sound like a good unit. Never heard of them before. Are they fitted with a toroid like the Aerosharp? if it aint broke dont fix it!! |
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| Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498 |
Zeversolar is a high frequency job, apparently, SMA took them over. Very different animal to the Aerosharp which is low frequency. HF needs much smaller transformers etc, much lighter. It is like comparing a old school power supply with a transformer to a switch mode PS. Getting close to getting the big OGI back online, maybe tomorrow I will start looking at reconnecting the GTI. There are only 10 types of people in the world: those who understand binary, and those who don't. |
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| oztules Guru Joined: 26/07/2007 Location: AustraliaPosts: 1686 |
This is when being remote is a sad thing. http://www.ebay.com.au/itm/1-5kw-Solar-panel-Inverters-50ea-may-be-scrap-only-invertors-inverter-invertor/272848635434?_ trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D20140106155344%26meid%3D7221cf42b21e4c8782b1a81c6233d08e%26pid%3 D100005%26rk%3D6%26rkt%3D6%26sd%3D282687428579&_trksid=p2047675.c100005.m1851 not fair  .......oztules Village idiot...or... just another hack out of his depth |
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Tinker Guru Joined: 07/11/2007 Location: AustraliaPosts: 1904 |
Link for oztules post here Pity he did not take one out of the box, all one sees is cardboard boxes on a pallet. They seem to be aerosharps. Klaus |
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| Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498 |
There is a price to pay for living in paradise. I thought you had enough of building inverters? There are only 10 types of people in the world: those who understand binary, and those who don't. |
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| yahoo2 Guru Joined: 05/04/2011 Location: AustraliaPosts: 1166 |
that's the same guy! motawizza  I thought he had run out of inverters.I'm confused, no wait... maybe I'm not... |
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| Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498 |
Back in action again, got the big inverter running although there is a small distortion at 0 crossing. But it is running and the Aerosharp GTI is doing its job as well. There was a brief opening in the clouds this morning and the Aerosharp was reporting 3.2KW at one point but then it held at 3000W. Batteries have not charged enough for any regulation to occur so nothing to report on that aspect. The Aerosharp is not changing the waveform apart from pushing the distortion at 0 crossing to 75% up the wave towards the peak. It then moves around a bit depending on load, this may be related to the choke. Not 100% sure why the other smaller inverter was causing so much grief but probably due to salvaged FETs I was using. I have some new PCB's I have ordered for the small inverter and I have new FETs so will make all new power PCB for it and see how that goes. There are only 10 types of people in the world: those who understand binary, and those who don't. |
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| oztules Guru Joined: 26/07/2007 Location: AustraliaPosts: 1686 |
It's a sickness.... always wondering how to make it better, simpler, easier to make and maintain... But I really have had enough of them for a bit... but those boxes are worth the money. I am always on the lookout for project boxes, and these are really nice., and you get the tranny and all the other stuff for free on top of that.... imagine trying to get those heat sinks for $50.00, and the list goes on. Good to see the unit back in the game. Motawizza ran out of the inspires that were new, these are rejected ( return to base) aero sharps. I bought a few pallets of them a long while back, and they all worked. I had many years of good service from my original aerosharps, and I can only assume crap installers were to blame for most of the returns. They still work just fine, but there was a year or so where they copped frequency problems from the new windmills on the island interfering with the big diesels... so I was forced to get a grow watt ( near 5hz drift).. I was logging a pair aurora GTI's for another bloke today, and the range was back in the .5hz range again, so maybe they have solved the over speed problems .....now it looks like maybe I can use the old aero sharps again. .......oztules Village idiot...or... just another hack out of his depth |
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| Mulver Senior Member Joined: 27/02/2017 Location: AustraliaPosts: 160 |
Hey Madness! hows it all going? |
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