Originally Posted by
drivesafe
Hi Bails and you will find they will get a reasonable charge while you are driving around town, with lots of short runs and plenty of starts.
But the first time you go on a long run and park for the night, don't be surprised if they are flat in the morning.
You can never filly charge lithium batteries directly off an alternator with SMART operation, and this applies to all makes of vehicles, not just modern Land Rovers.
Unless you can deactivate the SMART alternator function, which you can not do on any modern Land Rover, once the vehicle is being driven for more than about 10 to 15 minutes, your RRS's electrics will actually be powered by the lithium batteries and not by you alternator.
As the RRS draws about 40 amps for its own electrical needs, if your two batteries are fully charged at the start of your drive, and this is highly unlikely, after about 2.5 hours of driving, the two batteries will be near flat.
NOTE, for those who may remember the D4 that was fitted out with two lithiums under the bonnet, the above scenario was exactly what was happening on long drives. And at least one of the batteries has had to be replaced after just a few years.
Anyway, Bails, keep us informed!
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