swagifted:
omo, everything de YouTube this days i no go lie....but na the zeal to do breaking, do piping, climb ladder... Run wire... Crimp wire...etc be the main koko.

Do you buy already made controllers or you design from scratch

swagifted:
am a smart home engineer... So we mix with renewable everyday, plus I have a small setup of my own.

Na to come learn work engineer

b0rn2fuck:
when the current drop back fastly like draining without loads is reversing

Doesn't your battery last longer again?

If it doesn't, you may need to check your solar panels

Rany4all:
I think I understand you well enough, but the sketch will be much appreciated. Many thanks.

The dotted lines are showing the square pipes.
¾ square pipe. Should be okay.
Every other thing, the furniture guy suppose think about an

Rany4all:
Oh, that's good to know, thanks a lot. By the way, is that your area of specialty...I mean, do you make wooden doors?

No.
Its from my experience at technical college, I already left the field 5yrs ago


For the door frame,
You will need to drill holes through it then cut a groove along it.(It's inside the groove that the iron reinforcement would stay you can use 3/4" or there about thick ones)

Am trying to explain, but it's a long process

I will try to send a sketch

Rany4all:
Good day everyone. I've been considering something similar to the first door attached below for my front entrance door, but my concern is how to make those glass panel areas more secure. The door will be made with HDF boards reinforced with steel plates.

The question now is whether it's possible in Naija to embed steel protectors in the door frame in front or behind the glass panels, just like the second door below? Thanks in advance.

This is possible.

It's either they are attached with screws on the main wooden frame (that's for the ones not close to the wall.

The frame at the wall can be drilled with the iron passing

Nteogwuija:


I think the AC SPD should make sense because I was surprised how the lightening didn't affect the charge controller, because I felt it came from the solar. My thought now is that since the strike affected the inverter, it most likely came from the mains. So I think it makes sense to put an SPD between the mains and the inverter. This is just my layman thought process.

Yes one ought to be at the input side.

But am thinking of using another at the output as well.

This protection thing be like trial by error.

My only contribution on this hybrid matter is ,
If your hybrid inverter spoil, bring am make I use am Dey learn work .

Am actually serious

5yrs from now we will cash out massively because the massive adoption of hybrid most especially HF dey amaze me.

I personally prefer transformer based (torrodial core) hybrid inverter.

But you see those chopper transformer, nothing concern me with them, some of their design are funny

b0rn2fuck:
anytime around 4 o'clock observed the current seems to be reversing . The solar panel is new

Do you have pictures of this occurrence?
Snap your cc when it's normal and when it's reversing let's see.

That reversing you are mentioning dey amaze me

Nteogwuija:


Thanks for the response. But is it possible to install earth in a rented apartment? And I also learnt that an effective earthing can be very expensive, reason why most landlords opt for the less effective ones.

Aside the cost, the Question is how many people have the test equipment to achieve a good Earthing.

I am just coming from where they sell test equipment, test equipment are expensive.

Earth megger 200k?
I was told 95k some months back and I felt it was expensive.

Yes you can install one in a rented apartment

Nteogwuija:
Guys, pls how do I prevent my set up from thunder? About 2 weeks ago, there was rainfall and it came with thunder strikes which affected my 1ka inverter, which is currently undergoing repair. I have bought DC surge protector and breaker. But I'm still feeling this might not be enough, cuz someone told me that I can have these accessories but if the house isn't earthed properly that they won't work.

Please what measures can I take to secure my setup from the effects of subsequent thunder strikes?

Thanks for your responses in advance.

Go and get an effective earth. Your earth resistance should read about 10-5 ohms for residential purpose and 0-5ohms for industrial applications.

But that aside, Recently I was thinking about this lightening strike.
And I came up with this hypothesis

I was thinking what if I include a AC SPD to the output of the inverter too( reason is most lightening strike are likely to come from the AC side.)

Meanwhile it's just an hypothesis .

[quote author=Eldemmi post=128968952][/quote]

10m should tidy the project.

Besides the initial op wanted the system to run at night.

If you plan to run during the day, 7m will cater for it

b0rn2fuck:
Why is my solar panel drawing current back when the sun goes down, I decided not to put up loads for two days, I notice rhe current always regressing as soon as the sun become low.i think this my installer don't have full knowledge of what he was doing

Draw current back?
The solar panel Na Drogba ?

When you say draw back, is it not producing any current or your battery doesn't get charged?


When did you start noticing this

TechGeek777:


Although the HP of your AC wasn't stated, but if you can up your budget to 1.8m, you could get the following:

24v 3.6Kw SMS Sunmate Inverter 350k - 400k

24v 105Ah(2688w) LiFePO4 Battery 650k
Expected price according to Valto from previous response.

Jinko 435w * 4(1740w) 480k

Installation, Cables & Accessories 270k

Above are 1.75m - 1.8m

UPDATED

This SMS inverter you get plug whey dey sell am?

madscientist88:
as poor as my dad was he could afford to get me common sense,get well soon.

My condolences boss.

I love this your reply

Balistic4:
Guys, I've been afraid to do my electrical ever since I got this quote from my electrician. Please someone should help me check these. My house is 3 bedroom bungalow with 4 toilets.

Are these materials too much? Can anyone supply me original and complete cable with warranty at cheaper rate? I'm in abuja

Is there an electrical plan?
E fit be say he still dey quote to wire him intellectual property as he dey work

The reason this stuff is inflated is, the electrician plans to get the workmanship you will not agree to pay via wire .

Eldemmi:


Will 5m do it and be effective
Please can you break down the requirements for me.

Sorry I just did review on it now.
5m can get the materials. Thought not completely

Ournolly:

I am curious on which battery can power 2 hp compressor for 10 hours of no sunlight.

That will be like 12 dry cell battery.
What's the evaluation on Lithium battery?

Yes
15kwh

How come this topic is making front page

The op has not really been active for quite some time now.

This Na Wetin dey happen for the country and social media.

Look for a. Propaganda to push to keep people busy and definitely cash out

Keji1012:
people like u fit chop placenta . No be everything person dey chop. Save your younger siblings instead of thinking on how to devour them.

Go tell Calabar man that one

By the way today Na still Sunday

saysoo:
Wow, since it is buisness, i will go for Lister generator. Thanks

This will be cheaper for you on the long term if you are running an ice block business.

Besides your design requires more of battery backup.

Good luck on your quest sir

Emmanuel909090:



Never ever,I repeat , "NEVER EVER" people are so ungrateful, and once they feel they can do it, then you loose value.

Their is the new trainee in my firm, they want him to learn directly from me, because they always say I do it best.

The young lad I was teaching with my whole heart once told me, he is going to take over from me like play.

But me I don't joke with such things, that was when I started teaching him rubbish .

Now he knows a lot of rubbish.

Have you taught of when you grow old ?

Do you still think they will not lay you off?

Accountants and developers has this fear .

If you are a mechanic there is no way you will be afraid that someone will replace you (obviously you already know you will be replaced so you have embraced it by teaching people how to do it properly) then you subcontract.

E get one diesel engine mechanic my coursemate works with, Na so the company he used to service for wanted to boycott him, they called the supplier of the engine, a new Volvo engine and the supplier told them if that guy can't fix it then they will have to buy a new one. After them compare cost Na so them Melo go back to their vomit baba come add to the bill

Nothing is hidden under the sun.
You tell them, you no tell them baba if they will sack you they will still sack you.

When they sack you, they will still get the job done and you will have the whole software to yourself.

The reason people keep hiding stuffs is you are trying to prevent competition and still remain relevant, but staying relevant has a lot to do with management.

You are working in an audit firm, my friend stop thinking is a piece of software that would make you relevant.

Management and partnership is what makes you relevant (I am speaking from experience of the inner cactus).

Them go just use work kill you.
Share it so that everyone is self reliant.

So two days ago I got a call from a friend to participate in an installation with him at daleko around iyana isolo area. I went to the place and saw over head high tension and we are supposed to climb up .

Na so I decline the owner was saying he want it in his own side of the shop😂😂😂.
After so many back and forth, we situated it in a place, far from the overhead high tension lines.

No be me them go kill

saysoo:
evening to morning 7pm to 5am.

This should cost you around 5m roughly

Queed:


That was why I said,

"Your inverter is most likely turned on / connected to a power source (the battery)."

It's still connected to a power (battery) source even when switched off those switches (Most likely MOSFETs) can still falsely come on.

The battery is not the primary source for a controller, current is supposed to flow from panel to the battery and not the other way round. The switches being short circuited are on the panel side.

Okay.
All this our many speculation

You do electronics?

Queed:


The basic characteristics nature of every controller and inverter, is to perform voltage and current conversation and as regards the purpose (being a controller or an inverter), they have different configuration / topology of achieving such conversation.

To make my argument simple and less technical, and since most of us are well aware that inverters / charge controller are all glorified power converters (DC-dc or dc-ac or whatever), I will assume that for majority of these inverters / controller, they have internally, two groups of switches, of which one, and only one group must be switched on at any time. If for any reason both are on at same time.. big bang. This timing is usually controlled by an MCU (typically) connected via 'drivers'. You don't necessarily need a direct hit to make them miss calculate, just EM radiation from nearby strike can make some lose focus and most probably hang!! The MCU can hang leaving both groups of switches on! (That's why you'll need a reset for those that survived and can't self reset).

1. Lighting usually strike at night (controller is not charging, even if both switch are forced to turn on, no power from solar that will make them blow up).
Your inverter is most likely turned on / connected to a power source (the battery).

2. Even if strikes occurred during the day time, Most controller are designed to shut cct the panel to find the Maximum point, so the the two groups switches coming on at same time might survive the current rush (and it's usually not sunny when it rains).

3. All my assumptions are base on non direct hit by lightning oo. I am not sure that even the so called branded names will survive a direct hit! (Controller and inverter inclusive).

PS: just my theories.

I agree with all except the battery part
(Cc and inverter are both connected to the battery. In situations where inverter self is not working, it still used to be affected by lightning)

bassdow:

charge controllers most deals with DC current + not as exposed as inverters because internal circuitry of the charge controller has been designed to quickly shutOff when surge is detected wether from failure or from lightening.

Also Lightening mostly affects things having more conductors in them and by look of things, an inverter has much more better conductors in them than a charge controller

I don't think this is why.

The question is how come is controller MCU architecture more protected (even in thunder strike, you don't need to reset it).

Aside from drivers flashing (this is probably as a result of over voltage) Na that MCU be the main thing

dollarnaira:


Begging for answer

I am trying to understand it too.

Though CC has a way different architecture from an inverter.
A cc is just a simple buck converter with a microcontroller to control its Charging algorithm and stages.

How ever inverter microcontroller has to generate the pure sine wave signal (a lot of computation is going on in the controller so small interruption, e don forget).

Mind you, DSP inverter technology are changing, we use to have inverters that made hissing sound while working ( it is not modified) but now they are quite.

So this are things person needs to study

mvphenryeto5:


Why is it that lighten don't spoil Cc it's only inverters they affect

You are already thinking about what I have been thinking

Hero2t:


What brands, please?

E no get name oh.
Na cut and join.

The transformer and casing is genus.
Board is gks Abi GSK.

I will post the board picture when I find it.

I have been studying this stuff for some time now. I

swagifted:
we wey de stay for rented houses no even sabi the kind weda dem even earth the house well.

More reason you should buy what can easily be fixed.

Them no dey tell you until e get wahala.

Do you know there are some inverters, when lightening strikes them, a simple resetting solves the problem.

I don't seem to understand how come some can withstand while others cannot .
We get one at a clients place, them no gree collect their own back