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Topic: Lithium Conversion - 2014 IH-45 (Read 4054 times) previous topic - next topic

Re: Lithium Conversion - 2014 IH-45

Reply #50 –

There is a way to home brew your own excite circuit to use a standard diode isolator with a Delco alternator. My '91 used this technique as designed by Foretravel. This is how the isolators you can buy with the excite option do it. Here is my original '91 schematic.

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20PCS 1N4002 Rectifier Diode 1A 100V DO-41 (DO-204AL) Axial 4002 1 Amp 100...

Here is a 300 amp isolator that I used in my '91 when I put in a larger Delco alternator. I put 2 terminals in parallel for the house batteries.

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Sure Power 3003 Battery Isolator

2 battery version

Sure Power 3002 Battery isolator
 

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Peter and Tammy Fleming
1991 U300 GV 40 - Sold, owned for 4 years
Downsized to Roadtrek Popular 210 class B

Re: Lithium Conversion - 2014 IH-45

Reply #51 –
While diode isolators offer some advantages for house battery systems, the larger ones are expensive and they have a significant power loss. In addition, having the alternators operate at a higher voltage to compensate increases the heat the needs to be dissipated in the alternator for a given delivered current.  For example, 14 volts at 250 amps = 3,500 watts. 15 volts at 250 amps = 3,750 watts. For the diode block itself voltage drop is almost a volt after it gets hot. Another 250 watts lost.

My go to is this Blue Sea ACR relay with override both electrical and mechanical.

ML-ACR Automatic Charging Relay with Manual Control - 12V DC 500A - Blue Sea...
This also eliminates the need for the boost relay.
Dennis Haynes
Bohemia NY
2008 Nimbus 342 SE Carlyle
Build #6475
Motorcade #19148
 

Re: Lithium Conversion - 2014 IH-45

Reply #52 –
Ted, have you gone back and checked to make sure what you set your Outback chargers to is still there and it did not go back to default?  Yesterday I was searching for air leaks with my tester. It does not like the sound that the Outbacks make when charging or inverting so I had disconnected from shorepower. When I reconnected I saw that the batteries were charging at 14.4V, I put my volt meter on a battery to verify the 14.4V.  I then went and checked the programing at the Mate2m and the programing was back at default.  I changed it back to 14.1 got back out of programing, went back in and the 14.1 value was still there.  Not sure why it went back to default.  Possible that Silverleaf did it but not sure. 

On second note have you thought about upping your charger limits to 15 or 16 instead of leaving at 14?  I believe that 16 will give you  125 amps per charger, where you (and I ) at 14 will only get around 110 amps per charger.
2014 ih45  (4th Foretravel owned)
 1997 36' U295 Sold in 2020, owned for 19 years
  U240 36' Sold to insurance company after melting in garage fire
    33' Foretravel on Dodge Chassis  Sold very long time ago