Welcome, Guest: Join Nairaland / LOGIN! / Trending / Recent / New
Stats: 2,569,574 members, 5,946,368 topics. Date: Wednesday, 28 October 2020 at 01:17 AM

Ojtech8291's Posts

Nairaland Forum / Ojtech8291's Profile / Ojtech8291's Posts

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (of 19 pages)

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 4:24pm On Jul 20
obinna37:
I don't think is the same inverter, my will show CH,as sign of charging,but now it doesn't show the CH,it just display 99.1 as the batteries are charge. This the inverter model below
I didn't show main On? Check your input wires especially the breaker or fuse.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 10:06am On Jul 20
obinna37:
yes,no voltage input in the battery, I think the inverter is faulty, can it be repair.
I have the same issue. The inverter will show that is charging but no increment in the battery voltage. The system is designed for grid interconnection with 1100W array to charge 24V200AH bank. The problem is that it is always in use during the sunny hours thereby leaving the battery empty in the night.
Education / Re: FUTO VC Approves N20,000 For Collection Of Undergraduate Certificate by ojtech8291: 11:57am On Jul 15
Time to forget about the certificate self. Many companies don't employ base on certificate again. Who certificates help? cheesy cheesy cheesy
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 12:03am On Jul 13
What are the causes of battery bank staying in bulk charging for a longer time? It doesn't charge above 23v for a longer time of charging on a series configuration.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 8:22pm On Jul 10
NiyiOmoIyunade:
You can never hope to balance out a 1v difference with a conventional lead acid balancer - these move on average about 1-5amps per label specs but in reality usually less than 1amp balancing current.

Their biggest failure is that they use voltage equilibrium to approximate battery SoC balance and this is very very incorrect.

What you should do is charge the batteries to full individually in 2 or 3 charge, discharge, recharge cycles and then put them back together again in series. If pressed for time, you can slap one standalone charger on each battery, set the charger absorb voltage above normal inverter absorb voltage and allow the chargers to individually charge each battery to full charge. You are doing this simultaneously e.g two separate 12v chargers attached to a live 24v battery system and charging each battery in tandem with inverter charging. The chargers can share thesame AC power source as inverter but you must never cross the DC inputs!!!

If you do it correctly, the DC voltage of the chargers will at some point override the inverter's and take your weak battery on to a full charge. Run this over a few cycles and disconnect after you see the two batteries now staying in sync under discharge and also getting to fully charged within a few minutes of each other.

If no positive changes after 10 cycles, then you have a permanent capacity mismatch that will never be fixed. You can no longer use your battery pair in series and must either purchase replacement batteries or switch to 12v in parallel.

This procedure is simple and safe but requires a thorough understanding of the physics of electron flow in a DC circuit, do not attempt if in any way you feel afraid or incompetent to see it through.

As a standalone 12v charger you can either purchase adjustable voltage smart 12v charger (if such exists locally) or as I do, use a laptop charger or AC/DC converter btw 15v to 22v DC voltage output - feed the DC output of your AC/DC charger into the PV input of a decent PWM controller and you have a DIY adjustable voltage smart 12v DC charger right there. Don't forget to set an appropriate charge algorithm on your PWM charger.



Thank you very much. Can the PWM charge controller current rating matter? Or the charger current rating? If so, what is the recommended current for the 12V200AH for faster charging?
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 10:18pm On Jul 09
ojeysky:


Is that a lithium battery?
Gel Lead-acid Battery
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 5:54pm On Jul 09
I don't have battery balancer now. How can I balance two batteries in series with a difference in voltage of 1V?
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 10:07pm On Jul 07
olaolu11:


Correct me if I am wrong. With 1.2kW h consumption, battery will be drained in 2 hours.
How did you get this 2hrs?
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 10:51am On Jul 07
Good morning, house. How do I balance battery manually without the use of equalizer? Two of 12V200AH in series. One up and the other down because of the Battery rack. The one down is higher than the one up by 0.11V. That is the one down is 14.13V while the up is 14.02V. Thank you.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 10:43am On Jul 07
ceaser:


Bhet why nau?

You know you shouldn't exceed that CC voltage. Abi you dey try experiment ni? grin
Somebody said it won't get to the maximum VOC.

1 Like

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 10:07am On Jul 06
ceaser:


Shuo! Na wa o.

Does that happen with most MPPTs or it's just a peculiarity of yours? What's the brand by the way?
Thank God it is not totally dead.SolarMate product
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 2:30pm On Jul 05
earthrealm:


Hahaha. You are very lucky , that you didn't burn the cc, you were told b4, ojesky encouraged you to risk it
Lolzzzzzz...The CC has very good protection but very bad in terms of array manipulations. It is called solarmate charge controller. Who has used it before?
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 1:01pm On Jul 05
dapsyra:


Your CC is probably going into protection mode when the sun is very high due to one or more of the following scenarios.

1. Over Temperature. The temperature of the FETs have gone above the safety threshold due to continuous operation at maximum power

2. Over Current. The output current spiked above the rated capacity for a sustained period

3. Over Voltage. The input voltage rose above the rated MPPT voltage

You need to rejig your array to avoid these issues.
It should be over voltage because the VOC of the series connection is little more than that of the CC Maximum input voltage. Maximum CC is 70V but the panels are 2S is around 77.6V. 1S4P will result to a lot of voltage drops. The only solution now is to change the CC. Thank you.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 12:55pm On Jul 05
earthrealm:


Haha..your connection is wrong...likely overloaded the cc above its rating
Yeah... The VOC of the series connection is a bit higher than that of the CC.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 10:55am On Jul 05
ceaser:


Lose memory as how?
Stopped charging until I have to off and on the breakers. It happens every time the sun is very high.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 7:59pm On Jul 04
mank1234:


Go with 3s2p or 2s3p.

Edit:
260w * 6 = 1560W.
Your cc puts max PV power at 1440W, you need to read the manual to know if and how it handles the excess, though you'll rarely (or never) reach 100% production.
The two days sun made my cc to lose memory oh... Because of excess. Just do 4 panels for your 24V setup.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 7:55pm On Jul 04
harizonal123:

Inverter is 24v
Your CC has several rooms for connections.

1 Like

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 10:27am On Jul 04
ojeysky:


Maybe you need to do some labeling on the drawing. What I see from the diagram is that output of CC goes on to the output of the inverter battery terminal (on the inverter), and I was suggesting that it will be better you take it to the battery terminal instead as we don't know the ratings of that inverter battery terminal (which will be practically serving as bus bar for your CC) and we don't know how it will react to current from the CC directly hitting the bus bar.

As to losing current, possibly a little depending on how much current you will be pushing on the cable between inverter and battery
I will amend it seems affecting the battery charging. Thank you.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 9:37am On Jul 04
ojeysky:


Unless the inverter has a dedicated port for that and your CC also supports that don't do it! Output from CC should go to your battery terminals!
As you can see is to the battery terminals. It is hooked at the battery terminals on the Inverter instead of running the cable from the CC down to the batteries, I stopped at the height of the Inverter. Did I lose anything from the panels to charge the battery?
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 6:57pm On Jul 03
Is this setup correct? The cable from CC to the Inverter battery nodes instead of directly to the battery. Any implication?

Which can easily fried MPPT CC, high Voltage or high Current?

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 12:22am On Jul 03
Dam5reey:


How come you got answers to this Question

What is your system Voltage?

I will assume 24V as common factor in both CC

If your system is 24V, then you cannot use the 40A controller
(6* 275w is 1650w ) 1650 watts / 24 is 68.75A

So you have only one option left.. ✅

Better still use Both ✅
How can both go in this condition. 1S3P not Good because of voltage drop. What do you think I should do? Thank you
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 7:07pm On Jul 02
Since this place is quiet let drop another question.

Can One HA02 handle 4S5P battery bank?
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 6:53pm On Jul 02
ojeysky:


I meant that it will be 35v per Panel, each of those panels with that rating won't do 35v, it will only always be close to it. Including in the morning.
You are right. Especially in Lagos that we hardly get sunlight. Thank you.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 6:23pm On Jul 02
ojeysky:


I don't think it will get to that level which will be 35v
2S is above 35V. 35V is the waking up voltage for my own. Sometimes it will reach 69VDC.

1 Like

Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 5:40pm On Jul 02
ojeysky:


I don't think 2S will ever hit 70v, it will only always be close no matter the cold start. I actually have a friend that runs 300w (2s2p) on a 70v CC and that is the scenario that has played out thus far.
I have the same setup that is still working out too. I am only trying to be at the safer side in order not to damage the person CC. I can manage my own but another fellow that did not understand anything will say otherwise. Thank you.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 4:19pm On Jul 02
dapsyra:


The SCC of your panel is 9.47A . 3S will produce a theoretical maximum current of about 28.4A. This is still well below the CC rated capacity of 40A.

Even if the current attempts to go above 40A, most well built CC will clamp it at the rated value.
You are very correct. I did multiply the SCC by the whole panels instead by the 3P. Thank you.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 4:01pm On Jul 02
ojtech8291:
I hope the Voc of the panel will not go against the Vamx of the CC at a peak sun?
ojtech8291:
Thank you but remember that the one with Vmax 100V is 40A. Will the 2S3P not going above the CC current?
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 3:56pm On Jul 02
Thank you but remember that the one with Vmax 100V is 40A. Will the 2S3P not going above the CC current?
dapsyra:


The only safe option is to use the 100v CC in a 2S3P array as 3S2P arrangement will also exceed the Vmax for the CC




If you use 2S3P format, the array VOC might go above the 70v Vmax the CC can tolerate especially in cool days. This is a sure recipe for disaster.
I hate this kind of CC that won't allow manipulations. The last thing to do is reduce the panels to 4 units and look for another 2 units to hook up the leftover. Any suggestions?
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 2:22pm On Jul 02
ojeysky:


I will use the one rated 70v and do 2s3p
I hope the Voc of the panel will not go against the Vamx of the CC at a peak sun?
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 11:23am On Jul 02
I have 6 units of 275W panels, Rated voltage 30.9V, Rated current 8.91A, VOC 38.8V, SCC 9.47A and Max system voltage 1000V with two different CC 12/24/60A VMax is 70V, while the other is 24/48/40A Vmax 100V. Which of the controller is the best to handle 6 panels and at what configuration of the array, 2S3p or 3S2P?
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 9:14am On Jul 02
mktinsight:


Where can one get Yingli?
Come to 4 Oye Balogun, Lekki phase1 for your Yingli panels. We have 310W Poly and 275W mono. Enter freedom way and ask of Car wash or Itedo.
Satellite TV Technology / Re: Solar Energy, A Complement To FTA by ojtech8291: 5:20pm On Jul 01
I have been thinking about these specifications for long but today I will drop the question so that everyone can benefits.
Please, all the gurus in the house should help and answer these questions. I can say about a few here.
What are the uses or the pros and cons of the following specifications on this solar panel picture below? Thank you.

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (of 19 pages)

(Go Up)

Sections: politics (1) business autos (1) jobs (1) career education (1) romance computers phones travel sports fashion health
religion celebs tv-movies music-radio literature webmasters programming techmarket

Links: (1) (2) (3) (4) (5) (6) (7) (8) (9) (10)

Nairaland - Copyright © 2005 - 2020 Oluwaseun Osewa. All rights reserved. See How To Advertise. 107
Disclaimer: Every Nairaland member is solely responsible for anything that he/she posts or uploads on Nairaland.