DC Charging of Ego Batteries?

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I'd like to be able to charge Ego batteries from a DC source. My use case is an off grid solar setup, but I can imagine a similar use case for a car charger.

Would Ego consider making a DC-DC charger? Or has anybody else built one?

I realize I can go DC => AC inverter => DC but the losses are quite substantial. I'd love if Ego brought a solution to market for this.
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Posted 1 year ago

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Official Response
I would think this would need to go from a 12 V source to have as wide a market appeal as possible, so that automotive use was possible.

The issue I see with that is, the DC bus inside the charger has to run at a voltage higher than 58 V, or whatever the peak charge voltage of the batteries is. To do that you would need to step 12 V up to that voltage, which would probably require generating AC current and running it through a transformer, then rectifying it back to DC. That process wouldn’t be too different from using an external inverter from an efficiency standpoint, so I’m not sure if there would be much to gain?

Off grid DC power systems run at a much higher voltage then automotive systems do, typically. However, settling on one input voltage would suit some people and not others.