back up power for tunze stream -- batteries in series??

CTaylor · 11/26/2019, 09:32 PM

Hi,
Can this be done?:
Using https://www.amazon.com/12v-10Ah-SLA-.../dp/B004WENYYE
2 of them in series in order to get longer pumping time?
If so, I'm thinking I wire negative to negative. Positive to positive. then take a positive to Tunze safety connector (?) https://premiumaquatics.com/products...connector.html
Then that to the tunze stream?

Let me know if that's right please!... I'm thinking I'd get nearly 24 hrs of pumping with the pump pulsing from 0-50% power (?). which is 4watts (near 0 power) to 25 watt (50 % ) power, average about 15 watt. I might have both hooked up to it so that may bring it to average 30 watts.

TY

RobbyG · 11/28/2019, 01:50 AM

Negative to negative and positive to positive is not a serial connection, they are in parallel and will produce 12v at 20Ah. If this is a 12v pump then at 30w you would get about 8 hours of runtime. Also charging parallel batterie can be tricky so you would need a charger that can independently monitor each battery during charging. I would instead go with a single deep cycle battery with a much higher amperage. More run time and easier to charge.

blowmecius · 11/29/2019, 07:09 AM

A single group 27 battery should have 90 to 100 ah. A flooded battery will cost about $100 at any autoparts store or walmart. If you insist on agm expect to pay 2 to 3 times that.

They are big. They are heavy. But you can put one and a charger pretty far away, say in the garage or basement and just run a wire to your tank. 18 gage wire would be good for 5 amps 25 feet. I believe the tunze adapter has a 4a fuse.

laverda · 11/29/2019, 09:35 PM

Quote:

Originally Posted by blowmecius

A single group 27 battery should have 90 to 100 ah. A flooded battery will cost about $100 at any autoparts store or walmart. If you insist on agm expect to pay 2 to 3 times that.

They are big. They are heavy. But you can put one and a charger pretty far away, say in the garage or basement and just run a wire to your tank. 18 gage wire would be good for 5 amps 25 feet. I believe the tunze adapter has a 4a fuse.

True but that type of battery should not be charged in the house. For many people, myself included it is not practical to have it in the garage.

CTaylor · 12/01/2019, 11:18 PM

TY for all the responses. I do not have a garage. I maybe able to find a spot on my balcony to put it on. I really didnt want to get a huge battery, though, then to wire it from outisde through to the tank. I didnt want to have electrical wires etc going from outside to inside. I just have a problem with that. I might just stick with the original battery back up with a single, not in series, and accept it will be only 6-9 hrs max power. Hopefully I'll be home if power goes out longer so I can switch to my gas generator.

11/26/2019, 09:32 PM	#1
CTaylor Registered Member Join Date: Nov 2001 Posts: 1,524	back up power for tunze stream -- batteries in series?? Hi, Can this be done?: Using https://www.amazon.com/12v-10Ah-SLA-.../dp/B004WENYYE 2 of them in series in order to get longer pumping time? If so, I'm thinking I wire negative to negative. Positive to positive. then take a positive to Tunze safety connector (?) https://premiumaquatics.com/products...connector.html Then that to the tunze stream? Let me know if that's right please!... I'm thinking I'd get nearly 24 hrs of pumping with the pump pulsing from 0-50% power (?). which is 4watts (near 0 power) to 25 watt (50 % ) power, average about 15 watt. I might have both hooked up to it so that may bring it to average 30 watts. TY

11/28/2019, 01:50 AM	#2
RobbyG Registered Member Join Date: Jun 2005 Location: 600 Ft From the Reef Posts: 2,099	Negative to negative and positive to positive is not a serial connection, they are in parallel and will produce 12v at 20Ah. If this is a 12v pump then at 30w you would get about 8 hours of runtime. Also charging parallel batterie can be tricky so you would need a charger that can independently monitor each battery during charging. I would instead go with a single deep cycle battery with a much higher amperage. More run time and easier to charge. __________________ The Optimist says the glass is half full, the Pessimist says it’s half empty, an engineer only see's a glass that’s twice as big as it needs to be! Current Tank Info: Insanely Automated Low Power Consumption 90 Gal Oceanic Bow System/Aquatronica Touch Controller/AQ Dosing Pump/AQT LEDS/AQ SMS/Seq Dart Pump/ASM G3/Ozotech Ozonizer/Koralin 1502/Chiller/Typhoon3 Ro/S.Squirt /Phos React/Rmt DSB

11/29/2019, 07:09 AM	#3
blowmecius Registered Member Join Date: Jun 2003 Location: Maryand Posts: 177	A single group 27 battery should have 90 to 100 ah. A flooded battery will cost about $100 at any autoparts store or walmart. If you insist on agm expect to pay 2 to 3 times that. They are big. They are heavy. But you can put one and a charger pretty far away, say in the garage or basement and just run a wire to your tank. 18 gage wire would be good for 5 amps 25 feet. I believe the tunze adapter has a 4a fuse. __________________ Homer no function beer well without. Last edited by blowmecius; 11/29/2019 at 02:24 PM.

12/01/2019, 11:18 PM	#5
CTaylor Registered Member Join Date: Nov 2001 Posts: 1,524	TY for all the responses. I do not have a garage. I maybe able to find a spot on my balcony to put it on. I really didnt want to get a huge battery, though, then to wire it from outisde through to the tank. I didnt want to have electrical wires etc going from outside to inside. I just have a problem with that. I might just stick with the original battery back up with a single, not in series, and accept it will be only 6-9 hrs max power. Hopefully I'll be home if power goes out longer so I can switch to my gas generator.