Alcon,
I realize opinions on Earthx are all over the place, but I was going to see if there is a consensus of where to place the battery. It's nearly impossible for me to mount my 680c on the engine side of the firewall. The only way I could make it work is if I use a remote oil filter location (not a fan). After talking to the factory about their note "if a battery is located inside the cabin it should be in a protective enclosure that vents to the outside." It turns out that that is a requirement for certified aircraft as ordered by the FAA and doesn't apply to experimental. Here is what would have to happen for an earthx battery to have a thermal runaway (very unlikely with LiPo4 chemistry I'm told by various resources).
1) My alternator would have to fail and produce an overvoltage situation.
2) My Regulator with overvoltage protection would have to fail.
3) The BMS overvoltage circutry in the battery would have to fail.
4) My cockpit battery fail annunciator light (bought with the battery) would have to fail.
5) My other to volt meter warning systems would have to fail or me not notice the warning indicators.
Seems to me, the risk is very low. I don't have a lot of build experience, but I have owned RV-4's since 2004 (with an accidental purchase of an F1 Rocket for 3 of those years) and have never had an electrical issue except for replacing a solenoid and battery.
I wanted to keep this to the RV-3 community because there might be a way to mount it ouside the firewall that I may be overlooking. I did have plenty of room in either of the cheeks, seems like an odd place to put it, but it certainly fits. Wasn't sure if that would be a problem for the structure as it ways about 3.5 pounds.
Advice appreciated, unsolicited or otherwise.
Dwayne
I realize opinions on Earthx are all over the place, but I was going to see if there is a consensus of where to place the battery. It's nearly impossible for me to mount my 680c on the engine side of the firewall. The only way I could make it work is if I use a remote oil filter location (not a fan). After talking to the factory about their note "if a battery is located inside the cabin it should be in a protective enclosure that vents to the outside." It turns out that that is a requirement for certified aircraft as ordered by the FAA and doesn't apply to experimental. Here is what would have to happen for an earthx battery to have a thermal runaway (very unlikely with LiPo4 chemistry I'm told by various resources).
1) My alternator would have to fail and produce an overvoltage situation.
2) My Regulator with overvoltage protection would have to fail.
3) The BMS overvoltage circutry in the battery would have to fail.
4) My cockpit battery fail annunciator light (bought with the battery) would have to fail.
5) My other to volt meter warning systems would have to fail or me not notice the warning indicators.
Seems to me, the risk is very low. I don't have a lot of build experience, but I have owned RV-4's since 2004 (with an accidental purchase of an F1 Rocket for 3 of those years) and have never had an electrical issue except for replacing a solenoid and battery.
I wanted to keep this to the RV-3 community because there might be a way to mount it ouside the firewall that I may be overlooking. I did have plenty of room in either of the cheeks, seems like an odd place to put it, but it certainly fits. Wasn't sure if that would be a problem for the structure as it ways about 3.5 pounds.
Advice appreciated, unsolicited or otherwise.
Dwayne