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by jadnashuanh
Sun Feb 07, 2021 4:14 pm
Forum: Off Topic
Topic: A Neat Way to Transport Hydrogen
Replies: 5
Views: 1005

Re: A Neat Way to Transport Hydrogen

Well, from a weight standpoint, an equal amount of available energy stored as hydrogen, is going to be way less than the equivalent in a battery. Storing hydrogen in a high pressure gaseous state still takes some volume, whereas storing the same amount in a slurry, along with the equipment to extrac...
by jadnashuanh
Sun Feb 07, 2021 3:57 pm
Forum: Buying the BMW i3
Topic: 2018 Deka World Questions
Replies: 4
Views: 945

Re: 2018 Deka World Questions

From a maximum convenience standpoint, you may want to be able to recharge the i3 at its fullest capacity. Power=volts*amps. The maximum power the i3 can use is 7400W/hr. To achieve that, you may need a 32A device (which, in the USA, would require a 40A circuit to abide by the 80% rule for that type...
by jadnashuanh
Sun Feb 07, 2021 3:40 pm
Forum: News and Main BMW i3 Forum Discussions
Topic: Problem with DC (CCS) charging in cold weather.
Replies: 2
Views: 891

Re: Problem with DC (CCS) charging in cold weather.

The batteries can be damaged if you let the SOC drop that low and let it sit in the cold prior to recharging. I think I read that the 20% is the minimum you want to let it sit and cold-soak in the winter. There's logic in the vehicle to override a time window you may set for low-cost charging, if th...
by jadnashuanh
Sun Feb 07, 2021 3:31 pm
Forum: General / Main i3 Owners Forum
Topic: BMW Connected Feature
Replies: 8
Views: 1451

Re: BMW Connected Feature

BMW does a few things (probably more) to help maintain the batteries' lifespan. - active heating/cooling to keep them within a safe range - limit the min/max of use usable versus factual SOC - tapers the charge both at the beginning if hot or cold, and at the end to help prevent thermal problems and...
by jadnashuanh
Sat Feb 06, 2021 12:55 pm
Forum: Off Topic
Topic: A Neat Way to Transport Hydrogen
Replies: 5
Views: 1005

Re: A Neat Way to Transport Hydrogen

Most places have both electricity and water, so it could be said that making hydrogen that way could be pretty universal, too. There's been a lot of progress in the electrodes and how pure the water needs to be to do electrolysis. That doesn't make sense today for most places, as it takes a fair amo...
by jadnashuanh
Sat Feb 06, 2021 12:44 pm
Forum: Buying the BMW i3
Topic: Level 2 Charging Approach
Replies: 13
Views: 2149

Re: Level 2 Charging Approach

Places where 220-240vac is standard have it better when it comes to plugging in their EV...people also tend to want bigger batteries, and charging them will take longer when you let it get down. If you don't drive much on a daily basis, and can get back to full in between uses, you may not need to d...
by jadnashuanh
Sat Feb 06, 2021 12:13 pm
Forum: News and Main BMW i3 Forum Discussions
Topic: Strange BMW e-mail
Replies: 10
Views: 2101

Re: Strange BMW e-mail

Off topic, but BMW demonstrated a home power storage system using removed i3 battery packs years ago. Given what the selling price of one from say Tesla is, and the selling price of a 2014 i3, personally, if the rest of the 'kit' required to use the battery pack was reasonable, I'd be willing to pul...
by jadnashuanh
Sat Feb 06, 2021 12:07 pm
Forum: General / Main i3 Owners Forum
Topic: BMW Connected Feature
Replies: 8
Views: 1451

Re: BMW Connected Feature

On something like a cellphone or a laptop computer, yes, the battery will last longer if you never charge it to 100%, or leave it on charge for a long time, but an EVSE and an EV do not leave the power connected...the incoming acv is totally disconnected once the vehicle thinks it is as charged as i...
by jadnashuanh
Fri Feb 05, 2021 6:19 pm
Forum: Off Topic
Topic: A Neat Way to Transport Hydrogen
Replies: 5
Views: 1005

A Neat Way to Transport Hydrogen

Saw this article today about research a company in Germany has been doing regarding making hydrogen easier to transport and use. The hassle still is that getting the elemental hydrogen is currently, not all that green, but IMHO, as solar, geothermal, wind, tidal power develops more, storing energy i...
by jadnashuanh
Fri Feb 05, 2021 3:16 pm
Forum: General / Main i3 Owners Forum
Topic: BMW Connected Feature
Replies: 8
Views: 1451

Re: BMW Connected Feature

FWIW, BMW has some automatic buffers in their battery logic both at the top and bottom. Tesla, under some circumstances, will let you use more, and limiting maximum charge most of the time has some advantages. Unlike say a cell phone, the smarts in an EV disconnect the incoming power once they feel ...

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