₦airaland Forum

Thanks!
I love your practical suggestion.

bigrovar:
something like this happened to me recently. The breaker between my cc and battery tripped up - thus saving my house from burning down - It turns out the I undersized the cable from cc to battery. I use 25mm (a distance of about 1 meter) with current up to 90A @24v passing through the wire.. this was then compounded by what I suspect to be partial contact with the DC breaker.. wire got so hot, breaker did it's job and tripped.. All this happened in peak afternoon with a solar panels array sending about 2800w of power to the cc..

This were my respect for Victron went to a whole new level.. My victron charge controller stood there.. without a battery to send all that energy too, it just switched to the higher curve of the MPPT and switched to float..In fact it took a long time to realise what was happening because controller continued working like nothing happened.. I had to turn off the breaker from the pv to cc and then changed removed the bad wire, upgraded it to 35mm and turned the system back on.. Victron charge controller resumed charging.. The trip from the battery gave no problem at all.

Cheap Cc can't do that.... Thank God everything went well...
For most DIY on this forum like myself, we use low Mppt CC which can't function like the victron CC..
Money Good oh

spartacus11:
Please how can i get the watts of this IBM monitor only the Amp was stated

I think the monitor is also AC and not DC

Get a kill a watt plug or energy meter. That way you can measure many devices you have and get the accurate measurement. You can just log onto jiji. ng and type "Electrical Power Consumption Meter Plug Energy" you'll see different vendors selling it.

mctfopt:
Breaker won't protect your system in the event of a surge. What can protect the system is a surge arrestor.


One of the major difference between an AC and DC breaker is that DC breakers creates more arc and needs a way to extinguish this to avoid fire in your system. AC breaker, due to behavior of AC, do not have such function.

But can you use an AC breaker in the place of a DC breaker, yes you can. But just know it is recommended due to above. You can read more about the differences here, and for more on the different type of DC breaker you can check this NL link: https://www.nairaland.com/390522/solar-energy-complement-fta/438#69609424

The size of breaker is dependent on what is being protected. Check my earlier post on this here: https://www.nairaland.com/390522/solar-energy-complement-fta/567#81118537

Thanks so much for the explanation, I get you.

zenith4biz:
How much?

How many volts?

Capacity?

5k
12v
800va~1kva

mctfopt:
Get a kill a watt plug or energy meter. That way you can measure many devices you have and get the accurate measurement. You can just log onto jiji. ng and type "Electrical Power Consumption Meter Plug Energy" you'll see different vendors selling it.

Thanks so much bro

terrymason:
Cheap Cc can't do that.... Thank God everything went well...
For most DIY on this forum like myself, we use low Mppt CC which can't function like the victron CC..
Money Good oh

my epsolar 60amps mppt cc survived upto 2wks of no battery connection, villa setup, they just reported that inverter isnt powering, and it took me over 2wks to go and investigate. arrived saw that somehow, the weak as,s crimping i did on the battery positive terminal had disengaged from the cable.

before embarking on the trip, i feared for the worst, as i asked them to do some basic diagnoistics..and all pointed to failed CC, i already bought a fangpusun cc, to change out the cc, as i thought it had failed. i decided to try powering it up, after crimping the cable properly, and it roared back to life.....
i musta been one of the happiest men alive that hour

https://www.youtube.com/watch?v=qMhdpWMDp04

Teewhy2:
House,
Does it have to be a DC breaker that has to be between the PV and CC or can someone use an AC breaker in between.
My CC is rated PV 150 volts and 70 amps, what size of breaker can I introduce between the PV and CC. In case there is lighting during rain will the breaker protect the CC by tripping off.

Never ever use an AC breaker in a DC circuit.
Don't even allow it to cross your mind.


Then search for "Magnum PT-100 Manual" and download it; it's free. That manual explains everything explainable regards to adequately sizing of both conductor and the OCPD; with detailed examples sef. All explanations done according to NEC standard. The manual can be an adequate guide for you.

Cheers

earthrealm:
my epsolar 60amps mppt cc survived upto 2wks of no battery connection, villa setup, they just reported that inverter isnt powering, and it took me over 2wks to go and investigate. arrived saw that somehow, the weak as,s crimping i did on the battery positive terminal had disengaged from the cable.

before embarking on the trip, i feared for the worst, as i asked them to do some basic diagnoistics..and all pointed to failed CC, i already bought a fangpusun cc, to change out the cc, as i thought it had failed. i decided to try powering it up, after crimping the cable properly, and it roared back to life.....
i musta been one of the happiest men alive that hour

Some of the things we regards as cheap can sometimes take alot...
As we all are trying to Do it ourselves and learn in the process, please kindly implement safety rules/Devices in our installation....

Oga earthrealm abeg dash me the fangpusun since you nor use am...

bigrovar:
something like this happened to me recently. The breaker between my cc and battery tripped up - thus saving my house from burning down - It turns out the I undersized the cable from cc to battery. I use 25mm (a distance of about 1 meter) with current up to 90A @24v passing through the wire.. this was then compounded by what I suspect to be partial contact with the DC breaker.. wire got so hot, breaker did it's job and tripped.. All this happened in peak afternoon with a solar panels array sending about 2800w of power to the cc..

This were my respect for Victron went to a whole new level.. My victron charge controller stood there.. without a battery to send all that energy too, it just switched to the higher curve of the MPPT and switched to float..In fact it took a long time to realise what was happening because controller continued working like nothing happened.. I had to turn off the breaker from the pv to cc and then changed removed the bad wire, upgraded it to 35mm and turned the system back on.. Victron charge controller resumed charging.. The trip from the battery gave no problem at all.

Is 25mm not suppose to carry 90a?

mcTrinity:
Never ever use an AC breaker in a DC circuit.
Don't even allow it to cross your mind.


Then search for "Magnum PT-100 Manual" and download it; it's free. That manual explains everything explainable regards to adequately sizing of both conductor and the OCPD; with detailed examples sef. All explanations done according to NEC standard. The manual can be an adequate guide for you.

Cheers

Thank you, I really appreciate

olaolu11:
Lol. Main thing be say e dey work

Lolz! But it looks scary menh.

olaolu11:
Lol. Main thing be say e dey work

Lolz! But it looks damn scary menh.

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How true is this statement?
A new inverter sealed lead acid battery of 200ah will carry a constant load of 12amps(140w) for 10hours at 60%dod.

Deluxe8000:
How true is this statement?
A new inverter sealed lead acid battery of 200ah will carry a constant load of 12amps(140w) for 10hours at 60%dod.

Theoretically yes, assuming we don't consider losses @12A will require at least 120Ah for 10hrs which is 60% DoD, but in practice it really depends on efficiency of your inverter but you should get 6 to 10h

mctfopt:
That is why I love premium product. The Makeskyblue will just go blank in the event that the battery is missing in action, and continue when battery comes back

Exactly same happened with a friend's PowMr. Dude's CC survived two days before diagnosis was made.

PowMr and MakeSkyBlue are same variants with different manufacturers.

But those two are not exactly premium like dat o, but they still do the job. Anyways I'd say they are Chinese Premium. So you work out the rest.

ceaser:
Exactly same happened with a friend's PowMr.

PowMr and MakeSkyBlue are same variants with different manufacturers.

But those two are not exactly premium like dat o, but they still do the job. Anyways I'd say they are Chinese Premium. So you work out the rest.

The premium mentioned in that statement is the Victron. Makeskyblue and PowMr are not premium, but they work. Makeskyblue has some little edge over PowMr in terms of software and setting flexibility.

mctfopt:
The premium mentioned in that statement is the Victron. Makeskyblue and PowMr are not premium, but they work. Makeskyblue has some little edge over PowMr in terms of software and setting flexibility.

Bro, let's give it to 'em.

They are "Chinese Premium". Work better than Chinese non premiums.

AshipaEk0:

https://www.youtube.com/watch?v=qMhdpWMDp04

These peeps are thinking. Apparently they constructed the special type of glass along the principle of light refraction as it occurs in prism and fibre optics (basic things we learnt in physics) to direct and concentrate the lights to those edges where the light sensitive semiconductors cells are installed.

The challenge I foresee here is that the surface area provided by the edges may not be sufficient to harvest as much power as would be harvested by a regular panel of the same dimensions. This limitation can be mitigated if there is a way to increase the sensitivity of the semiconductors multiple times beyond what currently obtains with regular panels, or if the glasses will have to be constructed to be thick, so thick that surface area of the thickness will almost equal the surface area provided by the flat surface.

This is something average Nigerians like us could have "thunk" up. Alas the support for research is absent and even if you self-sponsor, dream killers abound in our government circle.

I'm so sad right now.

ceaser:
Bro, let's give it to 'em.

They are "Chinese Premium". Work better than Chinese non premiums.

I agree, six years down the line Makeskyblue SCC is still cruising. If that is not premium quality, I don't know what is.

ojeysky:
Theoretically yes, assuming we don't consider losses @12A will require at least 120Ah for 10hrs which is 60% DoD, but in practice it really depends on efficiency of your inverter but you should get 6 to 10h

I think I get 7 hours, in practice. And the batteries have been in use for a while of course.

ceaser:
I think I get 7 hours, in practice. And the batteries have been in use for a while of course.

That's your LFP bank right? So you will get 7hrs for quite some time, same can't be said for most lead acid as they tend not to hold 100% SOC after some time

terrymason:
Cheap Cc can't do that.... Thank God everything went well...
For most DIY on this forum like myself, we use low Mppt CC which can't function like the victron CC..
Money Good oh

Even expensive ones .. don't want to name names (but it rhymes with Morningstar) many of the expensive tier 1 controllers would blow up when you disconnect the battery while actively connected to the solar panel. The key is how victron cc where designed. They were initially designed to have their internal circuitry charged by solar if solar is active and battery if solar is not available. This makes it to easily survive a battery disconnect.. I always Yimmu at @Niyi when he goes on and on about morningstar.. I can say right now that Victron Energy make the best controller in the market .. in terms of performance, ruggedness and integration with IT.

Namzy:
Is 25mm not suppose to carry 90a?

at 24v not advisable. What made my situation worse the partial contact at the breaker termination point.

bigrovar:
at 24v not advisable. What made my situation worse the partial contact at the breaker termination point.

Out of curiosity what battery chemistry are you using that can take 90A? LFP?

mctfopt:
Out of curiosity what battery chemistry are you using that can take 90A? LFP?

Good old, stone age tech called Flooded Acid Exide Tubular to be exact. The 90A is what the controller can push out at peak not what goes into battery. The battery usually take 60A max thanks to a carefully designed system of opportunity loads and a shallow discharge that prevents a prolong charging process. system is 24v battery capacity is 400AH

bigrovar:
Good old, stone age tech called Flooded Acid Exide Tubular to be exact. The 90A is what the controller can push out at peak not what goes into battery. The battery usually take 60A max thanks to a carefully designed system of opportunity loads and a shallow discharge that prevents a prolong charging process. system is 24v battery capacity is 400AH

Oh I see. If LFP it can take all.

Hello house,
Is there anyone/centre that can have a look at a MICROTEK inverter (1.5kva 12V)? Issue is a surge (after a loud thunder), charging of batteries works but not giving any output. I am asking for someone (He stays around Ibadan). Thanks.