₦airaland Forum

dollarnaira:
Series just 2 panels as Max pv for 24v powmr is 105v.

dollarnaira:
Series just 2 panels as Max pv for 24v powmr is 105v.

BigDickProblems:
Guys just a quick question pls. I’m still learning

I’ve observed that a lot of suggestions here tells people to series their panels (even for a 12V system) which I know increases the voltage and keeps a constant current.

For example, someone suggested a series connection for 3 panels likely to have a short circuit voltage of 48V and above for a 24V system. This is more like 144V (I.e 48V*3). Sorry, but is this voltage not too much for a 24V system?

Or Will the controller limit the input voltage of about 144V coming from the panel to the required charging voltage of 27V-28V for the system?

If yes, then what happens to the other voltage? Is it wasted? If 28V is what is being used for charging the voltage and the constant current in the system is 13Amps, it means that the power from a supposed panel of 1872Watts (I.e 144V * 13Amps) is actually 364Watts (I.e 28V * 13Amps).

Please someone should kindly educate me on this, it’s interesting to know. Thanks.

HeavenlyBang:
Says 160v there, though.

AndroBlaze:
The advice was given because they have MPPT controllers.

Your thinking and calculations are largely right but you are forgetting that an MPPT works by lowering voltage and converting it into required amperage. So being simple and going back to the example you chose:

"supposed panel of 1872Watts (I.e 144V * 13Amps) is actually 1872 Watts (I.e 28V * 66.8Amps) (all in theory oo, and obviously MPPT must be rated over 60 amps) "

So the the angle you missed is the fact that the excess voltage is being converted into increased amperage by the MPPT. PWM controllers do not have this ability.

dollarnaira:
At 48v

HeavenlyBang:
Weird.

ojeysky:
I am well and good Bro. I do pass by once in a while....good to see the growth (just like those that joined the thread before me will have said as well ) Thanks

HeavenlyBang:
Tricky. They can pump in the afternoon to handle the evening usage but the morning one has to be handled entirely by batteries.

Also sumos are tricky, since most draw a lot more than their rated output. For example, this 12HP is about 9kw on paper but in real life could be as much as 15kw.

What I'd tell you is to go there and get actual real life data on

- Power draw on each sumo
- How long it takes to pump full

You need a watt/clamp meter for the first one.

adrusa:
Their best approach is to get appropriate number and sizes of storage tanks and pump water exclusively during the day. Get plenty of solar power and get a little lithium battery to ensure smooth power during the day.

Emmalex83:
Good morning bosses in the house. Please i need your input on this.
There is a boarding school that called me that they need an solar system that can power their water pump everyday.
They have 4 water Sumos of each 3Hp totalling 12Hp. Please i want to know the size of Battery bank, Solar panels and inverter to use for this project.
Note:, they use water every morning before they go for classes, also evening time when school closes. On weekends, they use it mostly for washing of clothes and other hostels chores.

Obnoxious2001:
Get a DC submersible pump

adrusa:
Where are these guys? @ojeysky and @NiyiOmoIyunade. It has been a long time they commented here.

JUO:
hibernation mode. Group is an advertising place

dollarnaira:
This is not hybrid bro.
PowMr 60a:
12v 720w 20-80v
24v 1440w 37-105v
36v 2100w 50-160v
48v 2800w 72-160v

bkuranga:
Can you please recommend a different controller that can accommodate the 3 panels and maybe also give room for future upgrade?

omotoda:
Such controllers wont come cheap; you will be looking at 100amp to 120amp. Best thing is to buy a single unit of panel more and do your connection as 2s2p

Gshems:
They should just get bigger tanks. That would be the most cost effective choice

Obnoxious2001:
How do you fill up the tank?

HeavenlyBang:
Pumping during the day.

kristien4:
Is it safe to pass Ac wire/ and Dc wire inside thesame pipe that leads into a building.

Obnoxious2001:
You will need to consider if they have the structure to accommodate the tank.

By the way that will imply more energy to be spent pumping the water.

They might not even have water when it's needed the most because electricity might not be available.

DC pump/jacking pump Na the solution

oladele239:
Most times the cost of setting up a regular solar installation is far below the cost of procurement a solar gen.
However , the solar gen gives room for ease of mobility and requires very easy set up. Infact a DIY is almost what's needed!

Trippledots:
With a little bit of ingenuity, one can actually pack individual devices into an all in one package.
hi
Valto has packaged something like that before.

A sibling of mine packed 1.8kw, 1.28kwh, 60a MPPT charge controller into an all in one for an elderly family member of mine; all the major parts were purchased from linnov here. He can testify.

Emmalex83:
Good morning bosses in the house. Please i need your input on this.
There is a boarding school that called me that they need an solar system that can power their water pump everyday.
They have 4 water Sumos of each 3Hp totalling 12Hp. Please i want to know the size of Battery bank, Solar panels and inverter to use for this project.
Note:, they use water every morning before they go for classes, also evening time when school closes. On weekends, they use it mostly for washing of clothes and other hostels chores.

Whytehandy:
Good afternoon, please how effective are these DC solar pump and what is the idea of the price?

I have a friend that has a solar system that is okay for their basic needs, their only present challenge is pumping of water for their home use and for their fish pond.

Their pumping machine is 1 hp.

Cc: All

Obnoxious2001:
They are effective and comes in different HP.

For the current price I have no idea on recent price

kristien4:
?? ..Any response, abi my comments no dey show again?