Energy density

[vvgogh]

What's the lightning's energy density of the high voltage battery? I've seen some early references to an 1,800 lb battery. Does that correspond to the standard range vehicle's 107.6 kWh? If so, then it's 107.6 Wh / 818.18 kg = 131.5 Wh/kg - is that right?

I'm curious how this compares to some solar battery inverter systems primarily used as a buffer to recharge the high voltage battery from truck-roof mounted solar. I'm looking at the ecoflow Delta 3 Plus (27.6 lbs: 81.6 Wh/kg, 1000W solar), Delta Max (48 lbs: 92.4 Wh/kg, 800W solar), Yoshino B2000 (53.6 lbs: 107.2 Wh/kg, 600W solar) as potential buffer batteries. Those buffer battery energy densities numbers include (penalized by) the built-in solar MPPT, DC/AC converter, and casing in addition to their battery; this is a mass expense of the Lightning's inability to charge off solar directly in this comparison.

The high voltage battery will recharge the low voltage 12V. It's lame that doesn't work in reverse. I hope the next architecture generation will use a 48V low voltage battery and natively support charging the high voltage battery.

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[HOTAS]

The realities of roof mounted solar, 400 to 1000W systems,
are…..
30 to 65 sunny days for a full charge.

A respectable, but not portable, solar system would cost more than the truck itself.

Nothing new. Great science project, but portable solar is a joke.
Even the so called “solar” generators all offer “alternator“ chargers, that connect to your car, to make them legitimately useful. Of course they are no longer “solar”, but more effectively “gas” generators.

This guy discusses the reality…..



You could certainly build your own range extender pack, but the cost, again is not worth it, IMO. You’ll have an even heavier, less efficient truck, and you’ll have 2 battery “packs” to charge.

I personally think Ford hit a remarkable sweet spot with this electric truck and it’s way under appreciated.

 

[vvgogh]

The realities of roof mounted solar, 400 to 1000W systems,

You can fit about 1,000W above a smartcap and sticking a bit forward above the cab. As solar improves from 21ish to 25ish percent module efficiency, you start to push 1,200W in that same roof space. The 120V charger draws 1,440W. You'll get about 8h equivalent on a sunny summer solstice day max with a flat roof mount, 8-10 kWh. It'll of course be less than clear sky conditions on average. You'll net a 20-30% boost during a week of camping while powering all your electric cooking appliances.

A respectable, but not portable, solar system would cost more than the truck itself.

My 8 kW home system was $20k in '22. It produces 10.5 MWh/year. That's about 21,000 miles/year equivalent if solely used to propel the truck.

 

[lightspeed]

What's the lightning's energy density of the high voltage battery? I've seen some early references to an 1,800 lb battery. Does that correspond to the standard range vehicle's 107.6 kWh? If so, then it's 107.6 Wh / 818.18 kg = 131.5 Wh/kg - is that right?

I'm curious how this compares to some solar battery inverter systems primarily used as a buffer to recharge the high voltage battery from truck-roof mounted solar. I'm looking at the ecoflow Delta 3 Plus (27.6 lbs: 81.6 Wh/kg, 1000W solar), Delta Max (48 lbs: 92.4 Wh/kg, 800W solar), Yoshino B2000 (53.6 lbs: 107.2 Wh/kg, 600W solar) as potential buffer batteries. Those buffer battery energy densities numbers include (penalized by) the built-in solar MPPT, DC/AC converter, and casing in addition to their battery; this is a mass expense of the Lightning's inability to charge off solar directly in this comparison.

The high voltage battery will recharge the low voltage 12V. It's lame that doesn't work in reverse. I hope the next architecture generation will use a 48V low voltage battery and natively support charging the high voltage battery.

1800lbs is for the ER battery, so it's closer to 170Wh/kg which is pretty common for NMC lithium batteries of this generation. 1800 lbs includes the giant enclosure, and the individual module enclosures, and all the other battery stuff which adds up.

 

[vvgogh]

1800lbs is for the ER battery, so it's closer to 170Wh/kg which is pretty common for NMC lithium batteries of this generation. 1800 lbs includes the giant enclosure, and the individual module enclosures, and all the other battery stuff which adds up.

Thanks for the correction.

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