Thoughts on using Tunze Safety Connectors with Nero 5

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KStatefan

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A dumb question, but to make 24v out of the 2 12v batteries, are the wired negative to positive?

Yes
Wired in series doubles the voltage and capacity stays the same
Wired in parallel voltage stays the same and capacity doubles

Parallel-vs-Series.gif
 
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A dumb question, but to make 24v out of the 2 12v batteries, are the wired negative to positive?
not a dumb question at all. there are 2 ways to wire batteries.

Wiring 2 or more 12v batteries in Series (connecting the + to the - ) will combine the voltages together and keep the capacity (runtime) the same. For instance Two 12v 100AH batteries will produce 24v with 100AH runtime.

Wiring 2 or more 12v batteries in Parallel (connecting the + to + and - to - ) will combine capacity (runtime) and keep the voltage at the same. For instance the same Two batteries would have the capacity of 200AH and still provide 12v of power.
 

Clownfishy

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Thank you for clarifying this ☺ Did anyone find a converted connecter to make it easier to connect into the Tunze Safety Connector?
 

Ky_acc

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@Reef Box — did you ever test the dc return pump using your battery backup?

thinking the ideal backup solution would be powering dc returns instead of simply pushing water in the display with power heads
 
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@Reef Box — did you ever test the dc return pump using your battery backup?

thinking the ideal backup solution would be powering dc returns instead of simply pushing water in the display with power heads
I have not yet. I will update as soon as I do.
 
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Thank you for clarifying this ☺ Did anyone find a converted connecter to make it easier to connect into the Tunze Safety Connector?
These are the two adapters to give a perfect fit at both ends. They're out of stock now, but you can try searching other places to find them. If my tank ever shows up, I'll be testing the Tunze setup on a Varios 4 return pump.


 

Zerodameaon

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That charger is out of stock, maybe even discontinued. They only list 25a 500 dollar chargers and up for 24v.

Is there a recommend alternative that anyone has?

I have a generator but that doesn't help me when I'm not home like just happened today.


I'm also thinking of a 10ah battery for my Nero 3, that should give me a day or two.
 
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RobMcC

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I currently have a deep cycle 12v marine battery with two Tunze Safety Connectors to run two Tunze powerheads as a back up in case of a power outage. I'd really like to switch over to a couple Nero 5s but don't want to have to switch over all of my Battery Backup too. Does anyone have any legitimate thoughts on whether I can run the Nero 5 powerheads off of the set up that I already have?

I use the tunze safety adapters on all my dc pumps. Two x 150 Ah SLA in parallel for 24v pumps and 1 x 150 Ah for the 12v. I run tunze, vortech, jebao, and reef octopus pumps of off these. They are coupled to 24v and 12v battery tenders respectively. The system works well, especially as I experience many power cuts in late summer through fall.
 

sgarron

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That charger is out of stock, maybe even discontinued. They only list 25a 500 dollar chargers and up for 24v.

Is there a recommend alternative that anyone has?

I have a generator but that doesn't help me when I'm not home like just happened today.


I'm also thinking of a 10ah battery for my Nero 3, that should give me a day or two.
This is the one I use. Works great. It’s $105 on Amazon.

 

Zerodameaon

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This is the one I use. Works great. It’s $105 on Amazon.

Oh I didn't even think to check that brand. I use some of their stuff for cars. Their normal battery tender was a life saver during lockdown since my car wouldn't move for weeks on end.

Thanks for this.
 
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