Diy 24volt battery backup (mighty jet)

[Paul31733]

Hey everybody!
I am no electrician by any means.. so if anyone sees anything wrong with this let me know. But I thought I would share my battery backup system I use for my Innovative marine mighty-jet.

I purchased this 24 volt battery switch assembly from Amazon for a few bucks.

I then wired two 12 volt batteries in series.
I just used two automotive batteries for testing purposes but would recommend using sealed lead acid batteries for long term.

To wire the batteries in series you attach the negative of one battery to the positive of the other. And use the other two terminals as your output power and grounds.
This will essentially double your voltage and keep the amp hours the same.

Again. This was just a test setup. Don't make fun of my batteries yet lol.

Then I cut the wires to my pump and figured out which is negative and which is positive.
You then connect wires as shown so that you have two power sources coming in on one end, and the pump wires on the other.

One thing I will add is a battery maintainer/smart charger to keep the batteries ready to go incase of emergency.

I hope this helps someone as I had a hard time finding a backup for my mighty jet pumps without getting an error two.

 

[SPR1968]

That’s way above my head! Lol

Im sure it will be very helpful to others though

 

[flagg37]

Hey everybody!
I am no electrician by any means.. so if anyone sees anything wrong with this let me know. But I thought I would share my battery backup system I use for my Innovative marine mighty-jet.

I purchased this 24 volt battery switch assembly from Amazon for a few bucks.

I then wired two 12 volt batteries in series.
I just used two automotive batteries for testing purposes but would recommend using sealed lead acid batteries for long term.

To wire the batteries in series you attach the negative of one battery to the positive of the other. And use the other two terminals as your output power and grounds.
This will essentially double your voltage and keep the amp hours the same.

Again. This was just a test setup. Don't make fun of my batteries yet lol.

Then I cut the wires to my pump and figured out which is negative and which is positive.
You then connect wires as shown so that you have two power sources coming in on one end, and the pump wires on the other.

One thing I will add is a battery maintainer/smart charger to keep the batteries ready to go incase of emergency.

I hope this helps someone as I had a hard time finding a backup for my mighty jet pumps without getting an error two.

Does your little Amazon dodad keep the batteries charged too? Could this be wired to say an Apex EB832? I guess since the EB832 runs on AC120v it would need some kind of inverter in between.

 

[Paul31733]

Does your little Amazon dodad keep the batteries charged too? Could this be wired to say an Apex EB832? I guess since the EB832 runs on AC120v it would need some kind of inverter in between.

No I will be adding a 24 volt battery stabilizer. All the Amazon doodad does is switch the circuit over. As far as the apex stuff goes I'm not sure I don't use any. Sorry.

 

[Lost in the Sauce]

No I will be adding a 24 volt battery stabilizer. All the Amazon doodad does is switch the circuit over. As far as the apex stuff goes I'm not sure I don't use any. Sorry.

So as soon as the 120v from the wall goes down, the doodad will switch the feed over to 24v?

 

[Paul31733]

So as soon as the 120v from the wall goes down, the doodad will switch the feed over to 24v?

Correct. But my circuit does not touch the 125 volt. The plug to the wall is a transformer which makes it 24 volt 1 amp.

 

[Paul31733]

So as soon as the 120v from the wall goes down, the doodad will switch the feed over to 24v?

So basically what I mean is the plug itself for the pump is 120v but the wire coming out and going to the controller is stepped down to 24 v and 1amp.

 

[Lost in the Sauce]

So basically what I mean is the plug itself for the pump is 120v but the wire coming out and going to the controller is stepped down to 24 v and 1amp.

So you've already reduced the voltage by the time it's coming into the switch, correct?

 

[Paul31733]

So you've already reduced the voltage by the time it's coming into the switch, correct?

So the wall plug actually does the drop down. The answer to your question is yes I am using the 24 volt wires but all the wires are 24 Volts

I have attached a picture . The red circle is where the pump plugs into the outlet. The plug itself does the voltage conversion and dropping down.

 

[Paul31733]

So you've already reduced the voltage by the time it's coming into the switch, correct?

This is my best art. I hope this helps you. Sorry I'm trying to explain it my best...

I have not tested the length of time this will run yet... I haven't had much time over the holidays to mess with stuff .

 

[Eagle_Steve]

This is my best art. I hope this helps you. Sorry I'm trying to explain it my best...

I have not tested the length of time this will run yet... I haven't had much time over the holidays to mess with stuff .

To simplify this for others.

Power goes to switching unit from both power sources.

Power source 1 is the ac to dc converter output and is the main feed. This supply keeps the switching unit relay in the “on” position. By doing this, the pumps naturally run on the normal wall plug that came with the pumps.

Power source 2 goes into the other side of the switching unit.

When power fails on source one, the relay inside the switching unit shuts off. When it shuts off, contacts inside of the relay touch and complete the circuit using power source 2. During this time, the contacts to complete the circuit for power source 1 are disengaged where the unit splits the power for feed to the pump.

When power comes back on, power from source one goes to the relay again and then power source 2 shuts off as the contacts for the supply are now not touching.

there are some diodes and other things thrown in there to keep power from back feeding, but no need for all that mumbo jumbo witchcraft lol.

 

[Dom]

I'm not understanding why you would run a battery backup in series.

 

[Paul31733]

I'm not understanding why you would run a battery backup in series.

The pump runs on 24 Volts and the batteries are 12 volts. When you wire the batteries in series it makes 24 Volts.

 

[Dom]

The pump runs on 24 Volts and the batteries are 12 volts. When you wire the batteries in series it makes 24 Volts.

24 volt pump. That makes sense.

I have my deep cycle batteries connected in parallel which power an inverter.

 

[Sshannon]

Good job with the explanation. Did you need to make a box to keep accidental water spashes from getting on the amazon doodad?

 

[Dom]

Good job with the explanation. Did you need to make a box to keep accidental water spashes from getting on the amazon doodad?

I keep my battery backup system AWAY from my tank.

 

[Sshannon]

What brand of battery stabilizer did you use? I'm having trouble finding a trickle charger for a 24v battery system.