Running a 24V water pump

[george897]

Hello, i want to run this pump :

800GPH 30W16FT Aquarium 24V DC Water Pump with Controller, Submersible and Inline Return Pump for Fish​

off grid.

As it says it is a 24vDC pump. I have found this battery:

Rack de 2 baterías solares XUNZEL 24V 8Ah​

But i'm confused about the AH and the Watts and what this means for the set up.

It says on the spec that the pump is ‎28 watts.

Is it possible to run this pump on the battery?

 

[time2roll]

28 watt pump will pull just over an amp from the battery. 28/24= 1.17

Battery will be depleted in 6 to 7 hours. 8 AH / 1.17 amps = 6.84 hours.

Possibly the pump will draw a little less than the rated maximum current.

 

[george897]

Time2roll, thankyou very much...

Now how to connect the pump to the battery... Do i need inverters ect?

The pump has a connector that appears to be for a standard house plug...(I'm in Spain) and the battery looks as if i could use the wires with the clips like jump leads...

 

[time2roll]

I would locate a connector that matches the controller input.

 

[HarryN]

I did something similar for my daughter's fish tank. The reason was to protect the fish during power outages.

In that project, there were some other related loads for air bubblers, and temp control that had to be dealt with, and it used a lot more power than I originally imagined when I got into it.

I originally wanted to do 3 days of power but had to reduce it to 2 days, as the battery pack was becoming too large to get buy in. ( size / aesthetics).

You will also need a charger to go from your incoming power ( solar or grid ) to the battery pack.

If your goal is to run it on solar, your battery should be at least large enough for 2 days, so:

( 2 days ) x ( 24 hours ) x ( 30 watts ) ~ 1.5 kW-hrs.

This is roughly the capability of a 24 volt battery with 100 amp-hrs capacity with a little extra headroom.

So 10 - 15x larger than the battery that you selected.

 

[george897]

Is it as simple as the diagram... battery - inverter - appliance?

 

[time2roll]

I would skip the inverter and the little power supply.
Find the connector that matches the controller input and attach direct on the battery.

The inverter and power supply will use significant power in the conversions.

 

[Rednecktek]

If it's a 24v DC pump and a 24v DC battery, where does the inverter come in to play?


Aaahhh, I see now, the wall wart. You can snip the wire off the wall wart, stripping it should be a red and a black wire inside. Strip, terminate, and connect those to the battery. There's no need to go DC to AC to go back to DC.

 

[george897]

If it's a 24v DC pump and a 24v DC battery, where does the inverter come in to play?


Aaahhh, I see now, the wall wart. You can snip the wire off the wall wart, stripping it should be a red and a black wire inside. Strip, terminate, and connect those to the battery. There's no need to go DC to AC to go back to DC.

Thanks, so this pump, for example, it’s 12v and I could put two clips on the red and black and connect directly to the battery?

 

[george897]

Another question I need to pump this water uphill and on the descriptions I’m seeing a big difference in what the manufacturer says it can pump vertically, I need around 25 meters… do you think this is possible?

 

[george897]

For example the first says 5m and the second 50m

 

[time2roll]

5 meter pump will do nothing at 25 meter lift.

 

[Rednecktek]

Thanks, so this pump, for example, it’s 12v and I could put two clips on the red and black and connect directly to the battery?

The picture of the battery you posted earlier is a pair of 12v batteries in series. You would have to remove the jumper between the two to get 12v and then yes, you could clip right to the terminals on a single battery.

According to the 2nd page, it's 12v or 24v. I figure all the specs for output and performance might be at 24v but the power draw specs might be at 12v where the numbers all look the best in advertizing.

Another question I need to pump this water uphill and on the descriptions I’m seeing a big difference in what the manufacturer says it can pump vertically, I need around 25 meters… do you think this is possible?

No. Not on a 60w 12v pump. If it does hit 25m, it's just getting water to the lip of the pipe and not flowing over which makes it "technically" 25m of lift... if you round up... under specialized conditions... here's a hundred bucks to say it does Mr. Certifier...

The listing shows (if I'm translating correctly) that the pump will:

Pump up to 5l per minute
Suck water up from 1.5m below it
Produce 116psi of pressure
Lift water 25m

It may be able to do all those things, "technically", but only 1 at a time. 25m lift? Sure, at 0L / min at 0psi. 116psi? Sure, at 0mm lift and 0.1L /min maybe, and so on.