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What you wrote is Honda's official recommendation for charging the IMA pack... it's in several service bulletins. It's not an ideal method, though, as it was more meant to recharge the pack after the car had been sitting on the lot for a long time (because nobody wanted them).
However, I must point out that you can build your own grid charger for under $50. Just connect this bad boy up to your IMA battery with a proper inline fuse and a reverse blocking diode (to prevent discharge when the car is off), then add a power cord. Next, connect your IMA fan to a 12 volt supply, which you can wire into the same power cord. Now you can just tuck this whole contraption into your IMA bay and then plug in the power cord whenever you want to grid charge.
However, I must point out that you can build your own grid charger for under $50. Just connect this bad boy up to your IMA battery with a proper inline fuse and a reverse blocking diode (to prevent discharge when the car is off), then add a power cord. Next, connect your IMA fan to a 12 volt supply, which you can wire into the same power cord. Now you can just tuck this whole contraption into your IMA bay and then plug in the power cord whenever you want to grid charge.
