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  #11  
Old 01-17-2021, 11:23 AM
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Auburntsts Auburntsts is online now
 
Join Date: Jan 2005
Location: Tampa, FL
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Quote:
Originally Posted by maca2790 View Post
Hi Todd,
the 1200 has a lot of reserve I should think. How long have you had it?

Cheers

John M
About a year and a half— I went with the 1200 to give me that extra AmpHour capacity for IFR purposes to compliment my dual alternator architecture.
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RV-10 N728TT - Flying!
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  #12  
Old 01-17-2021, 02:05 PM
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Lynnb Lynnb is offline
 
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Quote:
Originally Posted by Carl Froehlich View Post
Most RV-10s need some weight aft. What are you builders using the lighter EarthX batteries doing to correct for W&B?

Carl
RV-10 with dual PC-625 batteries mounted in the standard location and very happy with W&B.
Airflow Systems A/C tray and Evaporator. I went with the earthX to offset the A/C weight in the back. With a single pilot, I need about 7lbs in the baggage copartment to within forward CG, but with some tools and oil, that's easy to achieve.
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  #13  
Old 01-17-2021, 02:54 PM
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Join Date: Sep 2015
Location: Park Ridge, NJ
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Quote:
Originally Posted by Carl Froehlich View Post
Most RV-10s need some weight aft. What are you builders using the lighter EarthX batteries doing to correct for W&B?

Carl
RV-10 with dual PC-625 batteries mounted in the standard location and very happy with W&B.
30lbs of free weights in the baggage compartment when flying solo.
Alternatively, Tidy Cats in the back seat.
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  #14  
Old 01-17-2021, 04:23 PM
Electrogunner Electrogunner is offline
 
Join Date: Aug 2016
Location: Quarryville ,pa
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Originally Posted by cderk View Post
30lbs of free weights in the baggage compartment when flying solo.
Alternatively, Tidy Cats in the back seat.
I thought you carried that cat litter to soak up the oil that it leaks 😁.

In all seriousness, when my odyssey goes I will probably go with the earthx 900 in stock location. So far the odyssey has been flawless though.
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  #15  
Old 01-17-2021, 06:14 PM
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Bill Boyd Bill Boyd is offline
 
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Looks like only the 900 comes with the VNT option.

How much of a safety issue a non-vented EarthX is considered to be in the standard battery location in the -10 tail cone??
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  #16  
Old 01-18-2021, 02:31 PM
CDN CDN is offline
 
Join Date: Nov 2011
Location: Calgary, AB
Posts: 130
Default EarthX ETX1200 on the firewall

I installed an ETX1200 on the firewall. I went with a lightweight whirlwind prop so I wanted to eliminate some weight out back to keep the plane close to factory W&B figures. It also kept the wire runs short which have a couple benefits that I wanted to take advantage of. With this configuration their insulated, polished stainless steel battery box is a must. I had their original lightweight box with the open face/bottom and there was some evidence of case deformation from heat, most likely after landing because there was never an overheat warning light in flight. I made a carbon fiber box with insulation after that and I would still get the overheat warning once restarted after a quick refuelling stop. I haven't had a problem with the battery getting hot since installing the factory insulated box with a 5/8" blast tube a couple years ago.

In 2018 my 10 experienced a plane power alternator failure (the common stator leg breakage) that took out the earthX battery. I'm not sure what the failure was in the battery but I don't think they are as forgiving of such events as a lead acid battery. Everything still worked and the unloaded voltage was where it should be but it didn't have the same cranking power. It would also drain much quicker when running the avionics on the ground without the engine running. I sent the battery back to the factory for analysis. It was long past the warranty period but they were kind enough to give me a 50% discount. That was still an expensive day but I went with another EarthX (B&C alternator this time though).
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  #17  
Old 01-18-2021, 03:00 PM
maca2790 maca2790 is offline
 
Join Date: Oct 2011
Location: Rydal, NSW
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Hi Colin, thanks for the reply. Interesting about the ETX1200 on the firewall and your efforts to keep it cool. Regarding the Alternator failure, did you have a fuse in the Alternator output line to the battery? How old was it when you sent it back?
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  #18  
Old 01-18-2021, 03:27 PM
maca2790 maca2790 is offline
 
Join Date: Oct 2011
Location: Rydal, NSW
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Hi Bill,
there is a Vented EarthX 900. Obviously they are concerned about a fire in one of these Lithium batteries or they wouldn't provide the Vent system. I wonder how many they have had catch fire?
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  #19  
Old 01-18-2021, 04:24 PM
maca2790 maca2790 is offline
 
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Location: Rydal, NSW
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Hi Ashley,
did the 900 fit in the standard battery tray or did you have to modify it?


John M
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  #20  
Old 01-18-2021, 08:21 PM
RandyAB RandyAB is offline
 
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Location: St Albert, Alberta, Canada
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Quote:
Originally Posted by Bill Boyd View Post
Looks like only the 900 comes with the VNT option.

How much of a safety issue a non-vented EarthX is considered to be in the standard battery location in the -10 tail cone??
Bill I called EarthX and behind the baggage bulkhead is apparently not considered necessary to vent.
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