HELP WITH DIY BackUp Battery for 2 Mighty Jet pumps by Innovative Marine (326 GPH) Pumps

Nurse.Reef.Reapeat

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So I am trying to DIY a battery backup for my Mighty Jet return pumps. I bought the IceCap V3 backup and it didn't work with the pump. So i am planning to make one instead. I have watched this video on youtube:

but would like more feedbacks or recommendations? plan is to get at least 24 Hours runtime.

Mighty Jet Return Pump
Watts: 15 at 100%.
 
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Jonify

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Sorry, what's the question? Did you get your MightyJet hooked up and working fine? Is this about the IceCap?
 
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Nurse.Reef.Reapeat

Nurse.Reef.Reapeat

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Sorry, what's the question? Did you get your MightyJet hooked up and working fine? Is this about the IceCap?
The Question is, is there any other options out there or suggestions on how to build a DIY Back-up. and no IceCap V3 did not work on the Mighty Jet Return. gives me an E2 error (Under Voltage Protection).
 

DaddyFish

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Looked up the pump specs. Two of them will require 37.5 amp hours at 24 vdc, assuming 80% discharge of the batteries.

That's two lawnmower batteries in series. Are you prepared for that much space, weight and cost?

Screenshot_20210119-010119.png
 
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Nurse.Reef.Reapeat

Nurse.Reef.Reapeat

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Looked up the pump specs. Two of them will require 37.5 amp hours at 24 vdc, assuming 80% discharge of the batteries.

That's two lawnmower batteries in series. Are you prepared for that much space, weight and cost?

Screenshot_20210119-010119.png
i think this might fit my closet. will have to measure.
 

DaddyFish

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FYI

I calculated using...
(15-watts x 2) @ 24 vdc = 1.25 amps/hour x 24-hours = 30 amp/hour batteries

The 35 amp/hour battery will give you some margin, but not much.

I also watched most of the video, and I honestly wasn't that impressed with it. It's too complex a setup for such a simple task.
My recommendation would be to invest in two good quality 12v trickle chargers capable of handling the continuous full-load amps, and draw your pump load directly off the two series-connected batteries. You may need to diode/rectifier isolate the 24v load to avoid feedback through the individual chargers.
 
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Nurse.Reef.Reapeat

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FYI

I calculated using...
(15-watts x 2) @ 24 vdc = 1.25 amps/hour x 24-hours = 30 amp/hour batteries

The 35 amp/hour battery will give you some margin, but not much.

I also watched most of the video, and I honestly wasn't that impressed with it. It's too complex a setup for such a simple task.
My recommendation would be to invest in two good quality 12v trickle chargers capable of handling the continuous full-load amps, and draw your pump load directly off the two series-connected batteries. You may need to diode/rectifier isolate the 24v load to avoid feedback through the individual chargers.
Thank you so much for the info. I’m so bad at imagination. Would you kind enough to get us a diagram?
 

DaddyFish

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Thank you so much for the info. I’m so bad at imagination. Would you kind enough to get us a diagram?
I can't get to circuit design software at moment, but I found this handy diagram on the Deltran Battery Tender website. It's how I recommend you setup the battery backup for your 24 vdc pumps. Just make sure the chargers are capable of at least 1.5 amps constant, 2.0+ would be better. That way the chargers can supply the normal power as long as the AC outlet is live, along with some reserve to keep the batteries fresh for outages.

Screenshot_20210120-232503.png
 
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Nurse.Reef.Reapeat

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I can't get to circuit design software at moment, but I found this handy diagram on the Deltran Battery Tender website. It's how I recommend you setup the battery backup for your 24 vdc pumps. Just make sure the chargers are capable of at least 1.5 amps constant, 2.0+ would be better. That way the chargers can supply the normal power as long as the AC outlet is live, along with some reserve to keep the batteries fresh for outages.

Screenshot_20210120-232503.png
You’re awesome! Thank you so much.
 
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Nurse.Reef.Reapeat

Nurse.Reef.Reapeat

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I can't get to circuit design software at moment, but I found this handy diagram on the Deltran Battery Tender website. It's how I recommend you setup the battery backup for your 24 vdc pumps. Just make sure the chargers are capable of at least 1.5 amps constant, 2.0+ would be better. That way the chargers can supply the normal power as long as the AC outlet is live, along with some reserve to keep the batteries fresh for outages.

Screenshot_20210120-232503.png
Do I need that power replay too and all that in the video?
 
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Nurse.Reef.Reapeat

Nurse.Reef.Reapeat

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I can't get to circuit design software at moment, but I found this handy diagram on the Deltran Battery Tender website. It's how I recommend you setup the battery backup for your 24 vdc pumps. Just make sure the chargers are capable of at least 1.5 amps constant, 2.0+ would be better. That way the chargers can supply the normal power as long as the AC outlet is live, along with some reserve to keep the batteries fresh for outages.

Screenshot_20210120-232503.png
Design wise, I can just follow the video? Or you have better idea?
 
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Well, I was finally able to built and finish one... took me more or less 2 hours as I was trying to figure out how the wire goes and how the relay works. I thank God it’s Finally over... here’s some photos. FYI. It doesn’t look good down there. Lol.



319EF1E6-9D24-48C5-BA4D-0DD5EA07A4EF.jpeg


6D66C84D-1E21-4363-AF93-0447D373E6F3.jpeg


5F114BF2-1BC2-4B36-9B3C-644A190B43A3.jpeg
 

DaddyFish

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Function before Purdy is perfectly acceptable. You can make it purdy later. :D

Wherever/however you dress it up, make sure it's serviceable. You should plan on testing the backup function at least every six months. And plan on replacing those batteries every 4-5 years or earlier if they lose capacity.

I also highly recommend spraying the battery connections with a battery terminal protector spray. This is my favorite and commonly available at automotive parts stores.
1611622769552.png


When you get a chance to run a real-life current load test, it would be nice to share that info for others. And it would give you a realistic expectation of the backup time available from your setup.
 
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sark

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Well, I was finally able to built and finish one... took me more or less 2 hours as I was trying to figure out how the wire goes and how the relay works. I thank God it’s Finally over... here’s some photos. FYI. It doesn’t look good down there. Lol.



319EF1E6-9D24-48C5-BA4D-0DD5EA07A4EF.jpeg


6D66C84D-1E21-4363-AF93-0447D373E6F3.jpeg
 

sark

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That's awesome.
By any chance, would you mind sharing your plans/instructions for the back up.
 

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