₦airaland Forum

dsunmade: Is it possible to connect a dc power supply source to a charge controller instead of a solar panel?

Yes its possible if the dc supply is in the operating range of the charge controller. But the dc supply should be well filtered to reduce harmonics.
A desktop pc power pack would make an excellent dc supply. You should not try this experiment with an MPPT charge controller though.

uj_sizzle: Oh they do....just not when they expect it
I want Cersei dead seriously, someone should kill her already

No, Cersei should be n02. Her inbred, Geoffrey needs a horrible death asap. I wish he could die from Arya's sword.

fikfik: EMERGENCY

When connecting the morning star MPPT, my technician connected the battery sensory to the batt bank first before connecting to the charge controller. When passign the wire (used UTP CAT6 twisted cable about 0.5mm) through the hole to plug into the charge controller the +ve touched the common negative in the charge controller for a tenth of a second with a small spark. After connecting everthing, now my charge controller wont show the green flashing light when turn on the bettery breaker. Have comfirmed 53.5Volts at the charge controller battery bank terminals.

Is my charge controller fried, just because of that small spark wow, this is very sad for me... Please what are your thoughts?

Unfortunately yes. My friend's Morning star MPPT had similar scenario right before my eyes.

Seun: [img]http://cdn.previously.tv/m/2013-06-05-game-of-thrones-feather.jpg[/img]

[img]http://cdn.previously.tv/m/2013-06-05-game-of-thrones-arrow.jpg[/img]

[img]http://cdn.previously.tv/m/2013-06-05-game-of-thrones-throat.jpg[/img]

Check these out! A safe for work version of the red wedding.

How dare you dishonour the memory of the Starks. . May the old and new gods forgive you.

naijababe: The guy is just too buttery jare.

I concur. That role needs a Johnny Depp- like character.

See each FC as a manufacturing company producing a consumer product that is widely acceptable. See each player as factory of this company each in strategic locations. Budget is allocated to each factory based on output.

Depends on the brand of your inverter and charge controllers. The more sophisticated brands can sense other charging sources and adjust accordingly. Read your user manual.

Why BJT instead of MOSFET. Heat loss is too much from bjt transistors.
Good point on the tantalum though.

Saib4Jesus: Pls, can anybody in the house help me out, I have a UPS 650va I just converted to serve as an inverter with a battery of 12v 200 amp. I presume the ups cannot charge the battery so I need an external charger in line with the discussion so far. I don't know how it looks and where to possibly get it. The Buzz sound of the ups is disturbing I don't know how to disable it, I am also considering putting à cooling fan, don't know how to go about all these. Pls I need help.

For the charger, look for a switch mode charger. You may need to search well, cos the linear charger is more common.
The switch mode charger is generally transformerless, lighter and less bulky than the linear type. Also the linear charger sold in Nigerian market has no a.c line regulation, I.e if your nepa is not 220v you need a stabilizer otherwise you get erratic d.c output.
The linear charger in Nigerian market usually has no charge regulation I.e it may overcharge your battery if you don't off it manually.
Lastly your beeper can be desoldered. Just get a soldering iron and a little lead. The beeper is cylindrical and black about 1cm diameter.

George_D: feasy1,

under normal conditions you are very correct. 7,200w appears to be a lot but the emphasis here is on nameplate. i have since learnt that in solar, things are not always what they appear to be.

like i explained to a good member of this forum some time ago, i started my array build up with supposedly 'sharp' solar panels which i later found out to be not as original as i thought they were. also, most of the panels i bought with stamped 200w were not actually outputting their stated power, not so much because of the sub-optimal roof installation angles (although i think that also contributes a lot) but mainly because they were not original. so, i suspect a lot of those earlier sharp panels i installed were most likely 120w or at most 150w panels disguised as 200w.

what i have been doing of late is to make up for this shortfall - very much like 'damage control'. actually, i was faced with a choice of either starting completely from scratch by using original sharp panels or just adding to my existing array to boost up their output. obviously, i chose the second option.

so, in effect my supposedly 7,200w may just be a little bit around 5,000w in reality after discounting the sub-standard early sharp panels and the n[b]on-optimal roof installation angles[/b].

I am very sure your harvest will shoot up if you adjust the inclination of your panels. I suggest you make aluminium frames to prop up the panels.
I noticed this difference in my last installation where I strictly aligned in E-W with just a slight tilt to south.
The 5250watts polycrystalline harvests averagely double what the 3360watts monocrystalline array produces. The only reason I can find is just the non-optimal inclination of the 3360watts array which is tilted towards SE.

hunter2,1:
i think most of what we call ufo and aliens are humans from an alternate universe and not from another planet.

You'be seen too many episodes of Fringe.

How come threads like this make front page. 99% Nigerians don't know where Thaiti is.

It will harvest more if both are tilted south.

TotalGreen: this controller can handle 5 x 12volts battery, in the past when we needed to charge a 120volt battery for inverter like sukam and others, using 24volts charge controller was a lot, we needed to use like 5 x 24volts controller to do that, then the 24 volts controllers are like 30amps each, if we needed 60amps we needed to do like 10 x 24volt charge controller.

the outback 60 volt controller was a life saver with a high Amp charger. so for 120volt system, 2 x 60volt outback was the solution.

But that is like connecting 2 fm60 in series? Their tech support didn't like the idea when I asked them 3yrs ago.

@feasy1
The 68.7 is max battery reading during one of the charging modes(may just be a brief spike).
I didn't adjust much on the flexmax 80. Adjusting may not necessarily give better harvest. I just used default setting for 48v.

NB: check the stat or log on your fm80

feasy1: Many thanks bro, only following your footstep. I taught you were completely off grid, but reading your post now guess I can take it slowly and use the grid whenever it is available. I'd probably use less than 50kWh per month which should qualify for the lifeline R1 residential at NGN4 /kWh and zero fixed charge right? anyone in this category for PHCN billing??. Not sure if that work with the prepaid meter billing though.

Got the Prag Stabilizer now, so good to go for Grid input.

BTW, Can see Max Batt Voltage at 68.7V is this for a 48V system?

Yes it's 48v. The second installation actually out-performs the first. The main reason is the almost perfect alignment of the arrays in the east- west axis, tilt towards south. That alignment was not possible in the first installation due to aesthetics reasons.

@All
Timer switch helps manage your power. Recently my wife insisted on adding a freezer to her kitchen collection. With a timer switch on existing fridge, and another on the freezer, I was able to accommodate the new load.

Have been doing hybrid since. Whenever nepa is available I use it. Weather has been cloudy recently. I thought of increasing my array size, but I may move home soon.
My other installation is doing well though. It's not possible for me to monitor in details, cos I don't live there. I just took a shot of peak power.

George_D: all,

as promised, here are pictures of my most recent upgrade works.

i sincerely apologize for the delay in posting. i have been up to my

ears in work for over a week now.

Bro, phcn will soon sue you to court o .

feasy1: Another 3KW installation in town

PV= 3KW = 30* 100W Du Pont thin film
Inverter= 3KW, Charge controller FlexMax 80 (Outback Power)
Battery= 4* 12.5V 210 AH Sec batteries.
Voltage from the grid has been low to charge the inverter, getting pragrl stab soon.
But thanks to the sun, the system has been operating for three weeks without input from the grid not minding the cloudy days.

Pictures below

Dude ur installation is beautiful.

Children of Christ fighting, spawns of Satan rejoicing.

Hunkyimage: Dis kind sef,e no fit belle-full persin sef... mtcheew!!! My fellow calabar folkz how una seeam?

By the time u use hot water scrape the hair finish, wetin remain no go reach one chicken.

@ all women having fibroid, please do not listen to all these natural remedy touts. They waste your time and money. Consult a gyneacologist.

I vote futurama.

Re enacting such piece of history does not come cheap.
Old Benin empire is very rich in traditional practices and artifacts. Much of the artifacts has been carted away by the british- some in private collections.
So far all the nollywood epics done so far are based on cheap improvisations.

Could the muslim apologists kindly address the point raised in original article about african slave population thriving in the americas after abolution in contrast to middle east where there is no significant black population.
I am appalled by the possibilty it was due to routine castration of black men. If indeed islam was anti slavery, were there no voice of reason like xtainity had in William Wilberforce.

Nollywoods budget cannot do justice to such historical epic.

frosbel: Hmm, not really, Joseph's ancestry was clearly traced in this instance or we could ,make the same deduction from Matthew 1. Besides , ancestry Nathan rom the seed of David and had to come from his Male offspring starting with Solomon.

Try again.

But thanks for your input.

You are saying the same thing. Mary and Joseph were both descendants of David. Joseph was a descendant of David via Solomon. Mary was a descendant of David via Nathan (nathan was David's son too). Jewish tradition required Joseph's name be substituted for Mary in luke's genealogy.
Why are you seeking a complex solution?

Some bible commentators, assume the Luke geneology was thru Mary's lineage up to heli joseph's father inlaw. Since females were not quoted in geneologies, Joseph's name was substituted in the geneology.

@Jon.bee
Thanks for this post. This is the first time I see the symptoms laid down just the way it affects me. Like u said the culprits are sweat , heat and dirt. A combination of the three is diabolical.
I have grown to manage it over the years. I avoid group programs retreats etc. A more comfortable lifestyle and work environment has made the symptoms now occasional for me. My wife doesnt know. She only questions why I don't dab myself dry in the bath before coming into the bedroom I just ignore her.

Sitex: I suffer from this too but mine isnt this severe.
A dirty enviroment would triple the itching...staying under a fan or an ac and bathing without a sponge lessens the impact

I use a 100% cotton soft face towel as my sponge. This condition is quite a challenge. It's more torturing when you are amidst a group and you just finished taking your bath, and the questions keep coming. I suffered those years back in school.