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  #11  
Old 10-24-2019, 03:54 PM
tgmillso tgmillso is offline
 
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Location: Launceston, Tasmania, Australia
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If you can, ditch the battery box for the PC 680 as it is beastly heavy due to it being designed for lead acid. Earth X provides an aluminum solution or fab up a lightweight steel or titanium one if you are concerned about melting temps of aluminum in a runaway case.

Tom
RV-7 with an etx680c in an aluminum battery box
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  #12  
Old 10-27-2019, 11:48 AM
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bkervaski bkervaski is offline
 
Join Date: Mar 2017
Location: Birmingham, Alabama
Posts: 1,328
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I can confirm that the ETX-900 fits nicely in the stock RV-14 battery box with the addition of a few washers in the bracket for spacing.

I also had to replace the thick foam called out in the manual with a thinner piece.
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Last edited by bkervaski : 10-27-2019 at 09:31 PM.
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  #13  
Old 10-27-2019, 04:50 PM
AlexC AlexC is offline
 
Join Date: May 2018
Location: Oviedo, FL
Posts: 29
Default EarthX battery box doesn't fit RV-14A

Quote:
Originally Posted by tgmillso View Post
If you can, ditch the battery box for the PC 680 as it is beastly heavy due to it being designed for lead acid. Earth X provides an aluminum solution ...
After reading this thread, I thought I'd get ahead of the curve and purchase that made-for-Van's battery box from EarthX, since I'm nearly at that stage of my slow-build RV-14A. EarthX's website stated that the BB-MU box could fit both the EarthX and PC680 batteries, and that the holes to install the box are "identical to the existing 4 sided Van's battery box for the PC680." Well, it seems that although it may fit older RV models, it certainly did not fit my -14A's firewall, as none of the holes match.

I contacted EarthX, and they got back to me quickly and will let me return the box (although I am waiting for a return label - I'll update this post if they don't send it, and/or don't update their website to reflect the incompatibility with the RV-14(A)).

I posted this message so that others know that the EarthX battery box for the -14(A) is NOT the drop-in solution advertised. To be fair, it is a very nice aluminum box (better quality than the stock Van's box); but, it would take a bit of work to make it fit the -14.

_Alex
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  #14  
Old 10-27-2019, 07:24 PM
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mulde35d mulde35d is offline
 
Join Date: Dec 2017
Location: Williamsburg, VA
Posts: 204
Default Solution

So I found that same issue on my 14A. I did some measuring and came up with a solution of installing four k1000-3 nut plates and a reinforcement plate on the firewall. Was a little challenging due to a support angle, but should get the job done.
The Nutplates for the battery box are circled in orange and match drilled into the blank batter box flange.

This image is from the backside of the firewall since I currently have it on the rotisserie that blocks the front side view. You can see the rivets plugging the pre-punched holes from Van's battery box in the firewall. I figured a doubler plate was in order for the one nutplate that was not on a support angle.
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RV-14A - N122X (IO-390 TB, WW 74HRT, G3X)
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Last edited by mulde35d : 10-27-2019 at 07:49 PM.
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  #15  
Old 10-27-2019, 07:25 PM
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bkervaski bkervaski is offline
 
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Location: Birmingham, Alabama
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Wow. Wasn't expecting the EarthX to make that big of a difference cranking .. caught me off guard .. nice upgrade!
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  #16  
Old 10-27-2019, 08:32 PM
AlexC AlexC is offline
 
Join Date: May 2018
Location: Oviedo, FL
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Quote:
Originally Posted by mulde35d View Post
So I found that same issue on my 14A. I did some measuring and came up with a solution of installing four k1000-3 nut plates and a reinforcement plate on the firewall. Was a little challenging due to a support angle, but should get the job done.
The Nutplates for the battery box are circled in orange and match drilled into the blank batter box flange.

This image is from the backside of the firewall since I currently have it on the rotisserie that blocks the front side view. You can see the rivets plugging the pre-punched holes from Van's battery box in the firewall. I figured a doubler plate was in order for the one nutplate that was not on a support angle.
Thanks, Jon - that image and description are very helpful. It looks like you moved the battery box inboard a bit, likely to clear the inboard flange of the brake fluid reservoir. Do you happen to know if the new location of the battery box won't impinge on anything from (e.g.) the back of the engine, once installed?

_Alex
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RV-14A: Empennage mostly finished; Wings mostly finished; Fuselage underway
https://alex-rv14a.blogspot.com
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  #17  
Old 10-28-2019, 05:16 AM
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mulde35d mulde35d is offline
 
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Location: Williamsburg, VA
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Default Should be good

Based on photos and video I have of other engine installs my location should be good. I havenít hung my engine yet so no guarantees, but best I can tell it will clear everything.
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RV-14A - N122X (IO-390 TB, WW 74HRT, G3X)
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  #18  
Old 10-28-2019, 07:08 AM
AlexC AlexC is offline
 
Join Date: May 2018
Location: Oviedo, FL
Posts: 29
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Thanks, Jon - I may try a similar installation.

_Alex
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  #19  
Old 10-30-2019, 05:58 PM
EarthX Lithium EarthX Lithium is offline
 
Join Date: Feb 2014
Location: Windsor, CO
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Quote:
Originally Posted by AlexC View Post
EarthX's website stated that the BB-MU box could fit both the EarthX and PC680 batteries, and that the holes to install the box are "identical to the existing 4 sided Van's battery box for the PC680."

_Alex
Hello Alex,

Sorry about your frustration with your battery box purchase for your RV-14a and we will update the website with a table to try and make it easy and clear which battery box will work with the Vanís stock battery box that will match the hole pattern provided with Vanís kits.

The RV-12, RV12is, RV-14 and RV-14a have a stock 3-sided battery box with flanges to the inside of the box and a different hole pattern. You do not need to change the battery box to use an EarthX battery with this box. (ETX680, ETX900, ETX900-VNT, ETX1200 all fit) We do however have a new lightweight battery box that is available by mid-November that will be called BB-MU2, that has the exact same hole pattern of the stock 3-sided battery box that comes with the above-mentioned aircraft. It will retail for $89.

The RV-3, 4, 6, 6a, 7, 7a, 8, 8a, 9, 9a and RV-10 have a stock 4-sided steel battery box with the flanges to the outside, in our opinion, the EarthX batteries (ETX680, ETX900, ETX900-VNT, ETX1200) do not fit as they are about 5mm too wide. If you have this box, you would need to change it out. The BB-MU has the same hole pattern as the stock 4-sided battery box for an easy swap.

So to summarize:

ē The BB-MU has the same hole pattern as the stock Vans battery box that is 4-sided steel with flanges that are on the outside of the box. Disclaimer: if modified/ customized, we do not know if it will fit.

ē The new to be released in mid-November 2019 is the BB-MU2. This new design is based on the stock Vanís 3-sided battery box for the RV12, RV12iS, and the RV14/RV14a with flanges that are on the inside of the box. Disclaimer: if modified/customized, we do not know if it will fit.

Hope this helps clarify things. As always, please donít hesitate to reach out to EarthX is you have questions! We can be reached at sales@earthxbatteries.com.
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  #20  
Old 10-31-2019, 07:02 AM
AlexC AlexC is offline
 
Join Date: May 2018
Location: Oviedo, FL
Posts: 29
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Quote:
Originally Posted by EarthX Lithium View Post
Hello Alex,

Sorry about your frustration with your battery box purchase for your RV-14a and we will update the website with a table to try and make it easy and clear which battery box will work with the Vanís stock battery box that will match the hole pattern provided with Vanís kits.

The RV-12, RV12is, RV-14 and RV-14a have a stock 3-sided battery box with flanges to the inside of the box and a different hole pattern. You do not need to change the battery box to use an EarthX battery with this box. (ETX680, ETX900, ETX900-VNT, ETX1200 all fit) We do however have a new lightweight battery box that is available by mid-November that will be called BB-MU2, that has the exact same hole pattern of the stock 3-sided battery box that comes with the above-mentioned aircraft. It will retail for $89.

The RV-3, 4, 6, 6a, 7, 7a, 8, 8a, 9, 9a and RV-10 have a stock 4-sided steel battery box with the flanges to the outside, in our opinion, the EarthX batteries (ETX680, ETX900, ETX900-VNT, ETX1200) do not fit as they are about 5mm too wide. If you have this box, you would need to change it out. The BB-MU has the same hole pattern as the stock 4-sided battery box for an easy swap.

So to summarize:

ē The BB-MU has the same hole pattern as the stock Vans battery box that is 4-sided steel with flanges that are on the outside of the box. Disclaimer: if modified/ customized, we do not know if it will fit.

ē The new to be released in mid-November 2019 is the BB-MU2. This new design is based on the stock Vanís 3-sided battery box for the RV12, RV12iS, and the RV14/RV14a with flanges that are on the inside of the box. Disclaimer: if modified/customized, we do not know if it will fit.

Hope this helps clarify things. As always, please donít hesitate to reach out to EarthX is you have questions! We can be reached at sales@earthxbatteries.com.

Great, thanks for these details. I appreciate that you'll soon post a table to your website, and likewise that the return process for my BB-MU is going smoothly. (Part of the confusion when ordering was that the box that comes with the RV-14A is technically "4-sided," since one can consider the back, left, right and bottom as four sides).

I was looking forward to using an EarthX battery in my -14A, so it is nice to know that the stock box will work with the four batteries you mentioned. However, please post again when the new BB-MU2 is available for purchase.

Regards,
Alex
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