kennypedia:

Actually yes . most repairers don't actually know the device only few do. did you say u have gotten the step down?

Yes! exactly the type in the picture earlier shared. Wish I learnt this method much earlier when I was coupling my inverter system. Wouldn't have spent over 14k buying the miserable 'made in china' chargers.

Now needed is a multimeter. Haven't got cash to spare on that now. I bought one sometime ago but lost it carelessly after barley 1 week.

pato405:


Coupling the device with your Laptop charger is absolutely a much cheaper way to charge batteries than buying the overpriced suoer chargers and other funny chargers. I saw it for N2,500. There are some with capacity to output up to 20A!

OP, oya publicize to others. It's a good money saving mechanism. However, Solar panels have taken over as PHCN has vehemently refused to supply power. We've been in the dark for more than 4 days now in my area and my bad charger has worsened the matter.

pls who can direct me whr to get mine here in portharcourt o.... loving this more #savingmoneyinthisrecession

pato405:


Yes! exactly the type in the picture earlier shared. Wish I learnt this method much earlier when I was coupling my inverter system. Wouldn't have spent over 14k buying the miserable 'made in china' chargers.

Now needed is a multimeter. Haven't got cash to spare on that now. I bought one sometime ago but lost it carelessly after barley 1 week.

where did you get it the guy I asked has been telling me he has not gone to market.

kennypedia:

yes there are various brands its a dc step down . it is needed because the charger itself is 19v. any volt ranging from 12 to 13.4 is suitable for 12 v batt

pls this DC step down device, is it smart enough to stop charging when the battery is fully charged?
cc:
pato405
ceejay80s
teamsynergy

kennypedia:


https://www.youtube.com/watch?v=sGYPHbEBmfw&itct=CA8QpDAYACITCJuVjf_ditQCFcmDVQod2MYMAzIHcmVsYXRlZEjm85b-xN_Qxv4B&client=mv-google&gl=NG&hl=en

https://www.youtube.com/watch?v=_H-kvo9NQpI&itct=CA4QpDAYASITCLqRotHeitQCFdCzVQod2SAIiDIHcmVsYXRlZEj8s4aI2-ODs7AB&hl=en&client=mv-google&gl=NG
you can buy a power pack with up to 18 to 20a 12v rating

I love the idea!

pato405:


Bro, an electrical technician and I have opened it and inspected what could be the cause. A bulging capacitor was clearly visible and we changed it and also one of the resistors. After the changes made, the charger still REFUSED to work. Up till now that I type these texts, the guy is still battling with it even though I have given up. He said he wasn't giving up because he enjoys challenges of such and although I have given up on it, he pleaded that I allow him take a more in-depth look into all components - something tells me he'll never be able to resolve the problem as these chargers are mostly China products designed not to last beyond a year! You need to see the grammatical blunders on the manual, guy, you'll gasp for breath and pass-out. Our posts on this forum is sufficient evidence that they are all shambolic contraptions from mediocre technologies not built with rigor or ruggedness. More than 60% of first generation participants of this thread who successfully built the local inverter set-up (including me) all have the same experience with these chargers.

I'm interested in your suggestion, that we could, on this thread, also focus on exploring alternatives e.g just as we adapted the common office UPS for inverters, we could also start brainstorming on what components of the UPS could be changed to enable it charge higher capacity batteries (as opposed to the 7.5H inbuilt) i.e enabling it through local modifications to charge 100AH and more.

Communicating in English is not a measure of intelligence sir.
Our power supply suffers alot of fluctuations which subjects how fragile the Chinese mass produced items to highest abuse.

mrruns:
Hi all. Pls I hv a few questions;
1. With solar charge controller already inbuilt, can hybrid inverter supply AC (Alternative Current) power directly to feed appliances WITHOUT battery bank?

In other words, if battery bank supplies DC power to d inverter, now converted to AC feeding appliances, can solar panel (DC) power also feed directly to hybrid inverter, after having converted to AC to power appliances WITHOUT needing battery bank?

2. Apart frm d label or sticker pasted on d body:
A) are there other indications to differentiate between mono and poly solar panels? Since label can be deceptive.

B) are there also ready ways to know d true Watt, label or no label?

3. Does solar panels also have 12v and 24v? Or d traditional connection of 2pcs 12v in series is d way of achieving its own 24v too?

4. While already mounted and used for a while, but due to one reason or d other, if solar panel is left unused for a period of time, does dat damage it, or affect it in any way? If any, what is d considerable period like? Ref. to leaving battery unused for a while

5. Is there any rule guiding d distance to maintain between solar panel and d roof while mounting? Or can it just be placed right on roof and screw down?

Thanks for sincere and mature response.

Stiill waiting pls

1. I don't think so, because absence of battery means circuit is incomplete, and normal charge controller set up won't supply DC to inverter if Inverter only is connected to the charge controller without battery.

2a. The crystal shape of cells vary.
2b. Measure output current and voltage under direct sunlight with a multimeter then multiply.

3. Yes, each cell produce s 2v and they have various combinations to provided needed output. By the way output voltage varies with level of exposure to sunlight.

4. No. Expected lifetime is 25 years.

5. Yes. The greater the distance the greater the diameter of cable recommended.

All your questions have been answered before in the thread.

vansledge:

pls this DC step down device, is it smart enough to stop charging when the battery is fully charged?
cc:
pato405
ceejay80s
teamsynergy

Yes. There is a red, blue, and green LED lights on the silicon board. Watch the video. The moderator explained it: RED: Current comes in & is recognised, blue charging commences, Green; Battery full. SO once it's green, you can unplug it. I wonder why we didn't adopt this approach all the while on this thread. I have more than 4 functional laptop chargers in my store wasting away! . All I needed was the DC step down for 2k. I would have saved a whopping 12K for a weekend groove! chai

pato405:


Yes. There is a red, blue, and green LED lights on the silicon board. Watch the video. The moderator explained it: RED: Current comes in & is recognised, blue charging commences, Green; Battery full. SO once it's green, you can unplug it. I wonder why we didn't adopt this approach all the while on this thread. I have more than 4 functional laptop chargers in my store wasting away! . All I needed was the DC step down for 2k. I would have saved a whopping 12K for a weekend groove! chai

the price of that smart charger is 25k now o... so for those buying now is saving all the way o.
back to my question: what if am not at home and i plug it on NEPA light (it got filled b4 i com back), because i no 1 burn person house o
apart from showing the green light sheybi it wont over charge the ba3?

vansledge:

the price of that smart charger is 25k now o... so for those buying now is saving all the way o.
back to my question: what if am not at home and i plug it on NEPA light (it got filled b4 i com back), because i no 1 burn person house o
apart from showing the green light sheybi it wont over charge the ba3?

Seriously bros, make I tell you true confession, I no be electrical engineer. The little I know about electrical stuff are things I've read on my own and my little knowledge of O'level Physics.

Back to your question, I don't think overcharging your battery (while not a healthy practice for the battery life-span) can burn down your house. On the manual of the charger that I was using, the manufacturer clearly stated that once the battery is full, the user should unplug/switch off the charger as the device was not designed to switch itself off automatically. it was also written that while doing such will not cause any immediate harm, repeated (prolonged) neglected charging - e.g leaving it charging for - say 2weeks (because you are traveling) could reduce battery longevity/life span. signs of overcharging may include battery bulging on its sides.

Apart from being careful to avoid overcharging, since I bought the charger (1yr & 6months now o!), PHCN has hardly EVER supplied my location power sufficient enough to charge battery fully, let alone overcharging! So I've NOT experienced aftermath of overcharging and ofocurse I can risk it because those PHCN guys have never disappointment me! Sometimes I leave it on and go to work predicting that they will not supply power for more than 30minutes. When I get back from work I often ask my neighbour who's usually at home if they supplied power, he will laugh and say they flashed it for only 15minutes! for the whole day! . My area is notorious for LACK OF POWER SUPPLY. I'm thinking of blowing the expense and going for solar, but cash no just dey now.

Suoer Charges are really messed up.
I cracked it open and tried to diagnose the fault .
The circuit design is rubbish,very little safety and protection for the components.

I taught about this laptop charger idea before buying the suoer .
Even without the dc to dc converter it would charge your battery,but slowly since most laptop chargers can give about 3.5 to 5A maximum.
And most of this DC-DC modules are very scarce ,when they available they still have a max of 4A ,so no difference with the laptop charger .

Another option is hooking up the laptop charger to the solar panel input of a solar charge controller (since they are considerably cheaper than the AC chargers). Theoretically it should work ,and there would be little chance of burning or damage to the controller ,since its taking in only dc ,what might get damaged is the laptop charger (which is cheaper to replace ).

BUT i predict a lot of overheating ,since the solar controllers would want to pull as much currents as possible .

I should have just built the circuit myself as i initially wanted ,I was thinking its better and safer for the battery to get what so called "advance professionals" have designed mtcheew.And time constraints to.

Now 15k is burnt just like that.

people dey vex for this thread ooo

ceejay80s:


12v system.
from day one,all my batteries are tokunbo, except the brand new 100ah saint2ace bought for me ,they have all been working fine together,i am going to add distilled water to them soon

Pls help us with tips, techniques and procedures involved in adding distilled water. Where and how much we can get distilled water. A video of ur procedure would be a good idea. Thanks Oga ceejay.

vansledge:

pls this DC step down device, is it smart enough to stop charging when the battery is fully charged?
cc:
pato405
ceejay80s
teamsynergy

no but I bet phcn cannot give us 10hrs straight power supply

kennypedia:

no but I bet phcn cannot give us 10hrs straight power supply

mehn.. we dey get 10hrs straight lately for my area oo... buh we shoulkd be able to build a battery full cut off circuit , i just dont know if the powerpack is gonna charge 200ah battery without overheating and damaging the board. its kinda easy to fix laptop powerpack sha. its one big capacitor inside that usually gets damage, once replaced, the powerpack is go to go again...




nb: i think a diode might be necessary at the output side of the dc converter to block reverse supply from battery..
if the voltage is kept at around 13.7-14.4v with 4-5a, i doubt if that is ever going to over charge any deep cycle battery from like 60ah upwards, at most its gonna jst tickle the battery ( float charge)

teamsynergy:

mehn.. we dey get 10hrs straight lately for my area oo... buh we shoulkd be able to build a battery full cut off circuit , i just dont know if the powerpack is gonna charge 200ah battery without overheating and damaging the board. its kinda easy to fix laptop powerpack sha. its one big capacitor inside that usually gets damage, once replaces, the powerpack is go to go again...




nb: i think a diode might be necessary at the output side of the dc converter to block reverse supply from battery..
if the voltage is kept at around 13.7-14.4v with 4-5a, i doubt if that is ever going to over charge any deep cycle battery from like 60ah upwards, at most its gonna jst tickle the battery ( float charge)

its a ac to DC system you don't need diode again it back to ac . its a DC step down a DC converter is called inverter

pato405:


Yes. There is a red, blue, and green LED lights on the silicon board. Watch the video. The moderator explained it: RED: Current comes in & is recognised, blue charging commences, Green; Battery full. SO once it's green, you can unplug it. I wonder why we didn't adopt this approach all the while on this thread. I have more than 4 functional laptop chargers in my store wasting away! . All I needed was the DC step down for 2k. I would have saved a whopping 12K for a weekend groove! chai

the green light doesn't stop the charging process which means you have to unplug manually

vansledge:

the price of that smart charger is 25k now o... so for those buying now is saving all the way o.
back to my question: what if am not at home and i plug it on NEPA light (it got filled b4 i com back), because i no 1 burn person house o
apart from showing the green light sheybi it wont over charge the ba3?

it will . reduce the charging amp before travelling or going out if you have constant power supply

pato405:


Seriously bros, make I tell you true confession, I no be electrical engineer. The little I know about electrical stuff are things I've read on my own and my little knowledge of O'level Physics.

Back to your question, I don't think overcharging your battery (while not a healthy practice for the battery life-span) can burn down your house. On the manual of the charger that I was using, the manufacturer clearly stated that once the battery is full, the user should unplug/switch off the charger as the device was not designed to switch itself off automatically. it was also written that while doing such will not cause any immediate harm, repeated (prolonged) neglected charging - e.g leaving it charging for - say 2weeks (because you are traveling) could reduce battery longevity/life span. signs of overcharging may include battery bulging on its sides.

Apart from being careful to avoid overcharging, since I bought the charger (1yr & 6months now o!), PHCN has hardly EVER supplied my location power sufficient enough to charge battery fully, let alone overcharging! So I've NOT experienced aftermath of overcharging and ofocurse I can risk it because those PHCN guys have never disappointment me! Sometimes I leave it on and go to work predicting that they will not supply power for more than 30minutes. When I get back from work I often ask my neighbour who's usually at home if they supplied power, he will laugh and say they flashed it for only 15minutes! for the whole day! . My area is notorious for LACK OF POWER SUPPLY. I'm thinking of blowing the expense and going for solar, but cash no just dey now.

over charging causes hydrogen gas to build up inside the battery it will cause swelling and if care not taken explosion

mukhcech:




Pls help us with tips, techniques and procedures involved in adding distilled water. Where and how much we can get distilled water. A video of ur procedure would be a good idea. Thanks Oga ceejay.

u can get from Ac, water dripping out of an air conditioner , carefully poet the top of the batteries, u will see 6 holes, pour the water in to dem,don't cover the with the rubber cover or plastic top cover,after some days of charging,u can now cover

teamsynergy:

mehn.. we dey get 10hrs straight lately for my area oo... buh we shoulkd be able to build a battery full cut off circuit , i just dont know if the powerpack is gonna charge 200ah battery without overheating and damaging the board. its kinda easy to fix laptop powerpack sha. its one big capacitor inside that usually gets damage, once replaces, the powerpack is go to go again...




nb: i think a diode might be necessary at the output side of the dc converter to block reverse supply from battery..
if the voltage is kept at around 13.7-14.4v with 4-5a, i doubt if that is ever going to over charge any deep cycle battery from like 60ah upwards, at most its gonna jst tickle the battery ( float charge)

you can get up to 20amp from the charger

kennypedia:

you can get up to 20amp from the charger

How please?
I just checked 2 laptop chargers and what I saw were 4.7a and 2.15a outputs.

kennypedia:

its a ac to DC system you don't need diode again it back to ac . its a DC step down a DC converter is called inverter

the diode maybe necessary to prevent reverse flow, not rectification.

timifakay:


How please?
I just checked 2 laptop chargers and what I saw were 4.7a and 2.15a outputs.

i don't think a laptop power pack can supply more than 5a

teamsynergy:
the diode maybe necessary to prevent reverse flow, not rectification.

a diode is used for both

teamsynergy:

i don't think a laptop power pack can supply more than 5a

yes 5a in 19v when you step the volt down you can increase the amp. physics stuffs there is different between volt and current

teamsynergy:

i don't think a laptop power pack can supply more than 5a

have you ever thought of why we use different types of wires in electrical settings. this live wire can carry high watt but can't carry high volt. high current low volt that's why it can travel long distance. while the ones we use at home 240v wires cannot handle high current

teamsynergy:

the diode maybe necessary to prevent reverse flow, not rectification.

can a DC current flow back into a ac powered board. I really don't know please can you explain? I worked with dad in his shop from 2009 to 2014 non stop and still do once a while he never told me this.
I wish I am studying EE engineering but Transport technology and infrastructure TTI took me proudly lasuite

its now over one year i moved over to a more efficient PURE SINE WAVE INVERTER/CHARGER, all this souer charger and inverter frustrated me big time back then. i av to repair the souer inverter several times till it packed up. big ups to ceejay80s, saint2ace and the rest, who inspired me to start this solar/inverter journey. there is nothing better than uninterrupted power supply

kennypedia:

yes 5a in 19v when you step the volt down you can increase the amp. physics stuffs there is different between volt and current

still I don't think that board can deliver up to 20a

kennypedia:

can a DC current flow back into a ac powered board. I really don't know please can you explain? I worked with dad in his shop from 2009 to 2014 non stop and still do once a while he never told me this.
I wish I am studying EE engineering but Transport technology and infrastructure TTI took me proudly lasuite

it can flow back to d DC convert if a diode is not in place. more like a solar panel connected to battery without a diode

teamsynergy:

it can flow back to d DC convert if a diode is not in place. more like a solar panel connected to battery without a diode

solar power is in DC not ac take note . the solar cells are generating DC v

kennypedia:

solar power is in DC not ac take note . the solar cells are generating DC v

the module u are connecting to ur power pack is a DC DC converter, no ac is involved.. note that

teamsynergy:

the module u are connecting to ur power pack is a DC DC converter, no ac is involved.. note that

yes if is drawing back current then any of the lights will be on. we can also use a multi meter to test for current if it actually drawing back current