I use an enderchest/lapotron charger combo where I get a lot of my energy from the nether when I periodically go there. I have it set up where an RP filter pulls out empty lapotrons from an ender chest in the nether and places them into an MFSU being charged by 25 or so geothermals, which are being provided lava by BC pipes (i know, BC, yuck, but i'm considering changing that to RP soon). Another filter pulls the charged lapotrons out and deposits them back into the same chest. Both filters are connected to a timer which pulses every 30 seconds or so which both pulls another empty lapotron out of the chest and deposits the filled lapotron into it. (when I made the setup I didn't bother to do the math on how long it should take the lapotrons to charge, I might go back and change that). In the overworld there's another double filter/ender chest combo outputting to a charging bench mk3 (an IC2 addon, located here: [AddOn v1.90] Charging Bench v1.90-1 , the download at the top is out of date but there is an up-to-date version further into the thread) which is always set to discharge into my collection of 8 MFSUs in parallel.
The nether geothermal combo is a modified build from this thread [Tutorial] Efficiency, advanced lagfree Mechanics and logisticspipesfree recursive Autocrafting, with IC², Redpower and Tubestuff (including Windmillengineering by SpwnX) courtesy of GregoriusT. I imagine you could apply this principle to just transferring energy around. If you feel that method is too easy, you could go with a railcraft setup and an MFSU cart; I haven't tried this method yet, but I can see a nice way to do it.
I'm thinking about starting a new world soon myself and I'll probably make a "portable goethermal station kit" that I can take with me to lava pools I find when I go mining in the overworld, then i'll use lapotrons to transfer the energy away to my base-- I could probably use an ender pouch to store the kit materials and the lapotrons in.
Also, a fun fact I recently tested in a creative world: an IC2 pump being supplied lava by an RP pump receives enough lava to keep 5 goethermals filled with lava at all times (1 for each side of the pump, not counting the one used up by the lava source block, and assuming the lava doesn't run out). The goethermals are filled with lava sequentially by the pump and kept topped off whenever one uses up one unit of lava.