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  #1  
Old 12-06-2021, 11:18 AM
Coling955 Coling955 is offline
 
Join Date: Feb 2010
Location: London, UK
Posts: 37
Default EarthX battery

I'm thinking of replacing my Odyssey 680 battery with an EarthX Li-ion one. Two are listed on my supplier's website: the ETX680 and ETX680C. From what I can see the only difference is in dimension. It'll be going in my RV-7. Anyone using an EarthX battery and if so, which one? Many thanks from a grey and wet UK.
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  #2  
Old 12-06-2021, 11:51 AM
rocketman1988 rocketman1988 is offline
 
Join Date: Jun 2010
Location: Sunman, IN
Posts: 2,970
Default Earthx

I have dual etx900 batteries in my -10.

I am very happy with themů
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  #3  
Old 12-06-2021, 11:55 AM
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bjdecker bjdecker is offline
 
Join Date: Jun 2005
Location: Georgetown, TX
Posts: 1,138
Default

I am using the ETX-680 in my RV-7. I changed the battery box from the steel one that Van's provides to the aluminum version from EarthX (Firewall mount compatible)
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  #4  
Old 12-06-2021, 01:12 PM
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SMRacer SMRacer is offline
 
Join Date: Feb 2012
Location: Leesburg, VA
Posts: 630
Default Size matters

According to EarthX, the only difference between the 680 and 680C is size. If you have more questions, go to the EarthX web site. They respond quickly to a chat request.
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Leesburg, VA (KJYO)
RV4 N444JT (sold)
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  #5  
Old 12-06-2021, 02:06 PM
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Tankerpilot75 Tankerpilot75 is offline
 
Join Date: Jan 2015
Location: Oklahoma City, OK
Posts: 750
Default

You might want to consider the ETX 900 battery. More cranking power. Same size.
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Jim Harris, ATP, T38, EC/KC-135A/E/R, 2008 RV7A, 2nd owner, N523RM (2015)
Superior XPIO-360 B1AA2, Hartzel CS prop, Dual GRT Horizon EX with ARINC, EIS, Garmin 340, 335 w/WAAS gps, Dual 430s (non-WAAS), TruTrak 385 A/P with auto-level & auto-trim, Tosten 6 button Military Grips, FlightBox wired to EX, Dynon D10A w/battery backup, 406 MHz ELT. Mountain High O2 system, CO2 monitor, Custom Interior, TS Flightline hoses, ETX900 Battery, Great POH!
Retired - Living the dream - going broke!
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  #6  
Old 12-06-2021, 05:51 PM
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airguy airguy is offline
 
Join Date: Oct 2006
Location: Garden City, Tx
Posts: 5,816
Default

I'm running an ETX900 on my IO360.
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Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now.
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  #7  
Old 12-06-2021, 06:31 PM
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RVbySDI RVbySDI is offline
 
Join Date: May 2005
Location: Tuttle, Oklahoma
Posts: 2,690
Default

Quote:
Originally Posted by Coling955 View Post
I'm thinking of replacing my Odyssey 680 battery with an EarthX Li-ion one. . .
For clarifications sake, the EarthX batteries are NOT Li-ion chemistry. Rather, they are LiFE PO4 (Li - Lithium; FE - Iron; PO43- - Phosphate).

To all the chemists out there, my apologies for the non-subscript and superscript. Unable to get them to display appropriately.
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  #8  
Old 12-06-2021, 06:49 PM
cross cross is offline
 
Join Date: Jan 2007
Location: Vernon, British Columbia,
Posts: 47
Default earthx battery

I installed a etx680 in my rv4 over a year ago and it's been great. The C stands for compact and is slightly smaller but the amp/hr rating is the same. I was worried about ever having the charge it, other than flying, and recently bought a special charger. Be care full about what charger you use. You should also have some kind of over-voltage protection in case your regulator runs amok but there is a warning light that warns of problems. Your first impression when you pick one up is that they forgot to put the battery in the case - it is that light. It really cranks my high compression O320.
Chuck
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  #9  
Old 12-06-2021, 07:10 PM
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scrollF4 scrollF4 is offline
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Join Date: Jan 2010
Location: Flower Mound, TX
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Default

One other consideration, slightly buried in their documentation:
You want to get the right battery for your alternator.

If your alternator is rated for 60 amps (as is for most of the 2-seat RVs), you NEED at least the ETX680 family. The ETX900 will do but may take longer to recharge.

If you have a 70 amp alternator, the ETX680 is too small: You'll need to bump up to the ETX900.
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  #10  
Old 12-06-2021, 07:24 PM
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Tankerpilot75 Tankerpilot75 is offline
 
Join Date: Jan 2015
Location: Oklahoma City, OK
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Quote:
Originally Posted by scrollF4 View Post
You want to get the right battery for your alternator.

If your alternator is rated for 60 amps (as is for most of the 2-seat RVs), you NEED at least the ETX680 family. The ETX900 will do but may take longer to recharge.
.
Sid,
My 60 amp alternator usually fully recharges my ETX900 after starting within a few minutes (based on observed amperage drop).
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Jim Harris, ATP, T38, EC/KC-135A/E/R, 2008 RV7A, 2nd owner, N523RM (2015)
Superior XPIO-360 B1AA2, Hartzel CS prop, Dual GRT Horizon EX with ARINC, EIS, Garmin 340, 335 w/WAAS gps, Dual 430s (non-WAAS), TruTrak 385 A/P with auto-level & auto-trim, Tosten 6 button Military Grips, FlightBox wired to EX, Dynon D10A w/battery backup, 406 MHz ELT. Mountain High O2 system, CO2 monitor, Custom Interior, TS Flightline hoses, ETX900 Battery, Great POH!
Retired - Living the dream - going broke!
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