25W of solar panel question

[coogle]

5 LED lights, say 5W each, 1 fan, 25W normally, so total power consuming is 50W. For 8 hours working time, need one 12V 36Ah battery, 5A solar controller.

[arshadview]

25 watt solar panel and 17 ah battery

Thanks for your advice, would you pls kindly also advice base on my 25W solar panel, how many volt of controller and inverter will suit to it? Also what is the capacity of deep cycle battery should i use? Thanks.

it will be better to use dc load . 25 watt solar panel can properly charge a 17 ah battery and if use dc lights and dc fan to run your battery will last longer .

[russ]

Is this application for power failure situations?

Russ

[dvhenry]

Hi, could somebody design solar system for following specification;

Air blower:-
1) Phase - 3
2) Poles - 2
3) Capacity(m3/min) - 1.2
4) Pressure(kPa) - 13.7
5) Shield Bearings - 6306/6205
6) Insulation - B
7) Cycles - 50/50
8) Max.output - 1.6kw/1.6kw
9) Volts - 220/415
10) Amp's - 8.2/3.7
11) Max.Operation Pressure(kPa) - 19.6/19.6
12) Operation time per day - 12 hours
13) Place to install - Malaysia

Thanks

Do you have grid power? Why consider solar for this?

[lsy388]

Hitachi air blower

Hi, could somebody design solar system for following specification;

Air blower:-
1) Phase - 3
2) Poles - 2
3) Capacity(m3/min) - 1.2
4) Pressure(kPa) - 13.7
5) Shield Bearings - 6306/6205
6) Insulation - B
7) Cycles - 50/50
8) Max.output - 1.6kw/1.6kw
9) Volts - 220/415
10) Amp's - 8.2/3.7
11) Max.Operation Pressure(kPa) - 19.6/19.6
12) Operation time per day - 12 hours
13) Place to install - Malaysia

Thanks

[lsy388]

Thank you very much....

[rmay635703]

Thanks body, by the way, i still don't get the reading of (20 hour) at the battery, such as 12V 7AH (20hour). Kindly advice, thanks.

LoL, first of all a 7AHR battery isn't going to run much more than a flashlight.

2nd Batteries are rated by capacity OVER a specific amount of time. The faster you draw current the LESS capacity you get. Reason being that there is a lot of resistance and "losses" associated with drawing current quickly.

In other words that battery will provide .35amps for 20 hours and then will be permanently damaged and basically unusable after that amp draw.

If you were to draw much more current than .35amps you will not get 7ahr more like 1-4ahr depending on how fast you draw.

So to put it simply you only get the amount of capacity on the label if you draw the current over the rated period of time. Take longer you get more capacity, take less time you get less capacity.

And everything stated by Mike is correct, you can only use 50% of the batteries capacity if you intend on using the battery more than once.

So in reality you can draw .35amps for 10 hours and then recharge on that battery or it will be permanently damaged.

Cheers
Ryan

[lsy388]

Thanks body, by the way, i still don't get the reading of (20 hour) at the battery, such as 12V 7AH (20hour). Kindly advice, thanks.

[Mike90250]

Volts x Amps = watts Your battery 12v x 7ah = 84watt hours.
of that, half is useable, or you begin to damage your battery.

84 watt hours = 84 watts for 1 hour, or 42 watts for 2 hours

[lsy388]

Hi, can somebody tell me what actually mean 12V 7AH at lead acid battery reading? How could i know total load at watt for the lead acid battery? Thanks.

[Mike90250]

I wonder how much a 48v 25 watt trickle charger solar panel combo would be for my mini van or if such a thing exists

Does not exist, you would have to string several panels together to make your own.

[rmay635703]

I wonder how much a 48v 25 watt trickle charger solar panel combo would be for my mini van or if such a thing exists

[lsy388]

yeah!!! never shy to ask.......

[Renewable Ray]

LOL...no kidding Mike. And I read this thread word for word????? Maybe it's a great story, newbie in Malaysia getting help from "engineers" from around the world. The internet is amazing.

[lsy388]

Hi, may i know 1.8W mono 125*125 cell can charge how many watt per hour in Asia region? Kindly advice, thanks.