Dam5reey:


Perfect example of what I expect from this thread, how on Earth will someone say 20watts panels is good to run 40 watts device 247 are you truthbetold?

For optimization, Correct sizing matters, the statement in bold is very accurate don't need to ask questions I just believe it, cost its practical.

600watts panels to effectively charger 200AH battery Rule..

I also thought 20watts panel is too small. But I don't need 24/7 fan. Only as need arises which can't be more than 10hrs daily.

For those who followed my queries. How do I connect 80-100 panel to the fan?
It is rechargeable ac/fc fan with solar charging port.
Should I use a charge controller and drop in via the battery terminals or connect the panels directly to the fan via the charging port( would it have its inbuilt charge controller?

For those who followed my queries. How do I connect 80-100 panel to the fan?
It is rechargeable ac/fc fan with solar charging port.
Should I use a charge controller and drop in via the battery terminals or connect the panels directly to the fan via the charging port( would it have its inbuilt charge controller? Its battery is 4.5ah but I have rigged it with 7ah and is working fine. Will it go 20ah?

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Topmost11:
For those who followed my queries. How do I connect 80-100 panel to the fan?
It is rechargeable ac/fc fan with solar charging port.
Should I use a charge controller and drop in via the battery terminals or connect the panels directly to the fan via the charging port( would it have its inbuilt charge controller?

Maybe 80 watts panel, but not 100 watts panel.

The QASA DC fan I use, though non-rechargeable, says 80 watts panel can be tolerated directly into the DC in port of the fan. I assume the charge controllers in those ones with batteries is not likely to tolerate anything above 60watts.

If you want to go higher, then you may need an external CC and the big battery that you wanna use to power the fan.

zeanslim:


I have something similar like this, it never goes of ..like the fan is running forever 24-7.

I use a 40ah battery, and 150 watt panels and a 30amp chinko charge controller.

With a QASA solar standing fan 24watts(highest speed), I use it for 24-7 never off.. it also power some other stuffs like Laptop and phone charging ( extra 30 watts - when needed)

It have never gone below 12.6-12.7 volt and the battery gets fully charge before 12pm-1pm (even in cloudy or raining weather.

You use via an inverter or direct from DC ?

zeanslim:
It's not a fine work, but it's over 27ah 18650 battery pack 3s 15p

Do you test the capacity of each unit of 18650 cell?

Experts ln the house
I want to set up a solar power system, please
I need to get the best brand(s) of the following
The total load iS 700watt
It will run for 8 hours daily

1. Lithium ion battery 200maH
2. Pure sine wave inverter(pls what power rating would fit?)
3. Mppt Charge controller
4. Solar pannel, 300w

BetaTechnicians:

Do you test the capacity of each unit of 18650 cell?

Yes, sir plus their datasheet are available online, all cells were fully charge, discharge and recharge before assemble

BetaTechnicians:

You use via an inverter or direct from DC ?

Direct DC, there will be more power loss if used via inverter.

stokfrick:
Experts ln the house
I want to set up a solar power system, please
I need to get the best brand(s) of the following
The total load iS 700watt
It will run for 8 hours daily

1. Lithium ion battery 200maH
2. Pure sine wave inverter(pls what power rating would fit?)
3. Mppt Charge controller
4. Solar pannel, 300w

Please Can someone help me out

stokfrick:


Please Can someone help me out

MaH?? you mean, I guess you meant “Ah”

Would you rather chat us up on whatsapp?
08031138665

Ok but to run 8 hrs daily with 700 watts load, I don’t see
300 watts solar array getting you that
And again in case of no sunlight and per adventure your 200 ah battery is full, with 700watts Load you can only get abt 3hrs backup

Planing your power needs is the best step to take and avoid regret in solar arraying

www.jekitech.com

zeanslim:


Yes, sir plus their datasheet are available online, all cells were fully charge, discharge and recharge before assemble

I could see different colors of cells, does that mean all strings aren't equal and individual capacity of the cells would differ, how do they balance up and doesn't it affect anything?

zeanslim:


Direct DC, there will be more power loss if used via inverter.

True, so do you take the supply from the load contacts of the pwm cc or you take it straight from the battery?

BetaTechnicians:

I could see different colors of cells, does that mean all strings aren't equal and individual capacity of the cells would differ, how do they balance up and doesn't it affect anything?

Each cell has gone through "Capacity test" and the figures used to make 3 identical Capacity sets which then connected in series to make up the voltage.

BetaTechnicians:

True, so do you take the supply from the load contacts of the pwm cc or you take it straight from the battery?

I take load straight from the battery, I don't really trust does controller, so to avoid stress and heat.

BetaTechnicians:

I could see different colors of cells, does that mean all strings aren't equal and individual capacity of the cells would differ, how do they balance up and doesn't it affect anything?

Yes, the cells are selected base on their closeness to capacity and resistance after the test, also a BMS is installed to monitor the battery discharge and charge rates

ewizard1:


Each cell has gone through "Capacity test" and the figures used to make 3 identical Capacity sets which then connected in series to make up the voltage.

were you part of the kitchen cabinet?

zeanslim:


I take load straight from the battery, I don't really trust does controller, so to avoid stress and heat.

Ok, but how do you deal with cases when a device e.g. a bulb requires strictly 12V while the battery can go as high as 14V during charging?

Please i need a good 200Ah battery in Ibadan. i used Sukam battery since 2016. 4 years now. but it has gone weak. someone recommended the Amaron quanta battery. is it also good? if yes. i would need one for immediate purchase in Ibadan..... Thank you

mfonox:
Please i need a good 200Ah battery in Ibadan. i used Sukam battery since 2016. 4 years now. but it has gone weak. someone recommended the Amaron quanta battery. is it also good? if yes. i would need one for immediate purchase in Ibadan..... Thank you

They say it is good, but beware of knock-offs.

BetaTechnicians:

Ok, but how do you deal with cases when a device e.g. a bulb requires strictly 12V while the battery can go as high as 14V during charging?

You can take from the cc or use a DC stepdown or better still modify the cc charge voltage.

SO still on the solar pump matter, saw this rated 12v 5amps, . this is 60watts abi?. the flow isnt so great, but should serve fine, for a single household

https://www.ebay.com/itm/12V-Submersible-Deep-DC-Solar-Well-Water-Pump-Battery-Alternate-Energy-4-230Ft-/174025798481?_trksid=p5731.m3795&shqty=1&isGTR=1#shId

@ojeysky, have you bought?

BetaTechnicians:
were you part of the kitchen cabinet?

ionno what you mean by that. Sorry.

stokfrick:
Experts ln the house
I want to set up a solar power system, please
I need to get the best brand(s) of the following
The total load iS 700watt
It will run for 8 hours daily

1. Lithium ion battery 200maH
2. Pure sine wave inverter(pls what power rating would fit?)
3. Mppt Charge controller
4. Solar pannel, 300w

Is it 8 sun hours or night hours?
1. Assuming your Lifepo4 is full and you do 90% DoD is won't serve you for 8 hours @700w. A 400AH would be fine
2. Any 2 to 3kva would fit. Even a 1.5kva will do
3. Me I use hybrid but you can use any good standalone MPPT, a couple of them has been posted in previous pages on this thread
4. To charge a 200ah from almost empty to full with no load you will need to have at least 4x300w panels (this assumes that you will consistently hervest 40A for 5sun hours from the panel)

That's rough estimates, the gurus may add details but I hope it gives you an idea of what your budget will look like.

earthrealm:
SO still on the solar pump matter, saw this rated 12v 5amps, . this is 60watts abi?. the flow isnt so great, but should serve fine, for a single household

https://www.ebay.com/itm/12V-Submersible-Deep-DC-Solar-Well-Water-Pump-Battery-Alternate-Energy-4-230Ft-/174025798481?_trksid=p5731.m3795&shqty=1&isGTR=1#shId

@ojeysky, have you bought?

No I have not, looking to ride on your experience first ni o
I took a quick look on the spec, it says 4A max current yet on the description it says maximum power 750w. That does not seem to add up.

ojeysky:


No I have not, looking to ride on your experience first ni o
I took a quick look on the spec, it says 4A max current yet on the description it says maximum power 750w. That does not seem to add up.

Chinko just dey copy and paste specifications without regard to what is being sold.

mcTrinity:
Chai.... Even those that, in the past, mathematically and analytically proved, beyond reasonable doubt, that LeadAcid Battery is preferable HAS now gone Lithium.

Oh father, in this 2020, deliver us from all motivational speakers... It is well oooo

generalstingz:


I can get it for you if you dont mind. I deal basically with lithium battery chargers

What's your number?

ewizard1:


ionno what you mean by that. Sorry.

Was asking if you made it together?