DIY Vortech Battery Back up

75pxatr

New member
I found this diagram on an old reef central post showing a simple back up plan for a pump using a 12v marine battery and trickle charger. I thought a power inverter was required to do this.

Please share your back up system ideas and diagrams.

VortechBB.jpg
 
In the above diagram, the Charger is the power inverter so to speak. That circuit would likely work just fine, perhaps a bit large to fit neatly under a stand, but it should work.
 
How is a charger an inverter. The charger puts out DC, by definition an inverter puts out AC.
 
Being that It's a battery back up (DC) there is no need for an inverter anywhere in the circuit. Once commercial power drops out (AC) then the vortech battery backup (DC) takes over until power is restored. The only reason you would need a inverter for the above diagram is if you were going to use the battery as the main power for the vortech using the standard AC wall plug. If you tried to hook up a inverter to the 1.3mm input that is strictly DC you would probably fry the driver and void the warranty.
 
the vortech is a DC pump so the battery output of 12v works, if you where trying to use this type of setup for an AC motor pump then you would need an inverter. I think what Chris27 was implying was the charger is a converter AC-DC.
 
How is a charger an inverter. The charger puts out DC, by definition an inverter puts out AC.

By definition, inverter is also "one that inverts"

The schematic was correct, and rather then tell the OP they were wrong and steer the thread off course, the words "inverter so to speak" were used.
 
Inverter converts DC to AC. Rectifier converts AC to DC. The inverse of AC is still AC just that it will be 180 degrees out of sync.
 
The vortech's official battery backup sets the vortech in a special power saving mode doesn't it? I wonder what tells the controller to do that.
 
c'mon, this is all theory. Can we see some DIY's people have done themselves? I know if it was this easy, then people would have a ton of them on this forum.

Let's see them set ups!
Aaron
 
Would you want to ruin a $450 dollar pump and void the warranty in the process if things don't work out?
 
Now that we have all had electrical 101, we can get back to the question at hand...

The diy battery backup is as simple as it seems. Likely there is a relay on the input side of the controller where the normally closed position is connected to the 12V jack, such that when 24V is applied, the relay goes to the normally open position allowing 24V to the controller. Upon loss of power, the relay should fail to the normally closed position which will have a 12V battery hooked to it.

It's easy to test, just hook a 12V battery to the 12V port on the controller while the 24V plug is disconnected....you'll find that the controller powers up...and you're good to go. The Tunze setup is just the same, they just don't sell a shiny super whamidyne setup like Ecotech, choosing rather tell you how to hook a battery to it.

While this is speculation, I would hope that Ecotech uses a 12V regulated Lithium pack, given the price tag of the unit. One can build a reasonably similar unit with NiMH or lead acid batteries for a fraction of the cost of the $160+ that that one retails for....a Lithium based setup would be smaller, last longer per charge, and provide a much longer service life do to the fact that a lithium battery doesn't have the memory like other batteries....which would almost justify the parts. A decent Lithium battery pack will run $50, and a charger $30-40...which would explain the retail of $160. After all, they need to pay the bills.
 
The vortech's official battery backup sets the vortech in a special power saving mode doesn't it? I wonder what tells the controller to do that.

If you look at the battery backup module, you'll find it's only got two wires that connect to the controller. Those two lines are the + and - terminals from the battery. If control was done via the module, you would see an additional multi pin cable connecting between the backup and controller.
 
Great input from all - Thanks. My thoughts were that this would be a great DIY project because we should be able to build a back up from a marine battery that will last far longer than the back up sold commercially(and save $$ too)
 
"If" your vortech is already out of waranty and you could find the correct pin size for the 1.3mm input there really isn't that much to lose. I think finding the correct 1.3mm connector will be the hard part.
 
The jameco site says that Li-Ion pack is 12V DC - 4.5 Amp hours. Ecotech says the pack they sell will run an MP40 for 30 hours. Anyone know how to compare these 2?
 
Back
Top