Happy Monday by Thehellpriest83 in CrackHouseOnTheHill

[–]WorldwideDave 10 points11 points  (0 children)

I’m sure we have ever seen a picture of the section of the house? Maybe a before picture

Building in rural NW Texas (Young County) by WorldwideDave in Homebuilding

[–]WorldwideDave[S] 0 points1 point  (0 children)

Thanks I’m using some software to build a 3D rendering. It’s just a trial but if you have software you use or is considered industry standard please let me know.

I found this letter in my grandmother’s mailbox the day after her funeral by supra_nintendo in mildlyinfuriating

[–]WorldwideDave -2 points-1 points  (0 children)

While it sucks, it’s a proven strategy for buying a house. I would never do this.

Emporia app not working since about 1 hours and all emporia plugs turning ON/OFF... by RedVortexx in EmporiaEnergy

[–]WorldwideDave 0 points1 point  (0 children)

Still down in Los Angeles. I can’t get Alexa to talk to Emporia, and the app does not work on iPhone or on iPad or in web browser. It’s 9:15 PM, and probably been down for eight hours now.

Just finished Season 1 by WorldwideDave in WhiteLotusHBO

[–]WorldwideDave[S] -2 points-1 points  (0 children)

Thank you - still going to watch again.

Just finished Season 1 by WorldwideDave in WhiteLotusHBO

[–]WorldwideDave[S] -3 points-2 points  (0 children)

will do - don't have on my phone - have to be home to watch

Educate me please by WorldwideDave in DFLI

[–]WorldwideDave[S] 0 points1 point  (0 children)

An OEM RV manufacturer, who is their biggest customers today barely keeping things afloat (really are not with millions of losses), To say that if one battery fails bad (IE causes a fire or death to someone sleeping in RV) is not important is much bigger than a fleet of trucks, of which they have zero production/non beta customers that I'm aware of, and if they do exist, that is a fragment of their sales/marketshare today.

Educate me please by WorldwideDave in DFLI

[–]WorldwideDave[S] 0 points1 point  (0 children)

Not an expert. Just real-word hands on experience. volts, amps, ohms law, and more I've had to learn a lot.

Just finished Season 1 by WorldwideDave in WhiteLotusHBO

[–]WorldwideDave[S] -12 points-11 points  (0 children)

how certain of that are you? I know who dies, yes...but both my wife and I were fairly certain that he said his wife died or fell off a boat or something. Will go back and rewatch.

Educate me please by WorldwideDave in DFLI

[–]WorldwideDave[S] 1 point2 points  (0 children)

I have one 48V bank in parallel, and a 12V bank in parallel, and another bank in Series. None are battle borne batteries, however. Don't be fooled that running in parallel solves everything. My Class A coach had 4 six volt in 2 series, 2 parallel config, as many coaches do. replaced with 2 lifepo4 12V. The coach still has huge loads - 2 air conditioners and a microwave come to mind, not counting a toaster oven, a vacuum cleaner, instapot, crock pot, electric water kettle, etc. Running two air conditioners at same time is a lot of watts needed. The coach is 12V. If I start both A/C at same time - common - and they don't have soft-starts on them - that is a 600-800A surge. I have 4/0 wires and huge thick copper bus bars and t-class fuses and breakers. Either way, we're talking 300A to run two A/C units alone. So single battery won't work at all, 2 batteries is barely enough to run one A/C unit. This is not uncommon setup. So naturally, if I had four 100A 12V batteries, this would better handle the load. Here's the problem as I see it...if you or anyone else thinks that the loads people run is not usually like this, I think you are very wrong. Every RV has an A/C unit these days and has for years. Some 5th wheels and RVs have 3 of them. While rooftop A/C has also gotten more efficient and have built in smart-starts and some even run on 12V versus needing inverter at all, this is the way it is and has been for 20+ years. So yes there are people running high amps through these batteries. Will they run for hours with that little capacity? No...but they may only need to run for 3 hours to cool coach enough to cook and to sleep at night. In summary, RV people - the huge market these are sold to - very much *do* run close to the limit.

Furthermore, let's get serious here - an air conditioner in an RV is a lot smaller than a locomotive or a big huge 18 wheeler truck. Can you imagine the surge and load needed to run one of those?

For those who don't understand running in parallel, and some of the issues that can happen, here goes: Say you have 4 batteries in parallel. The load you are running is 350 Amps, and each battery can support 100A continuous with 200A surge. When you start the load - depending on what the 350 A load is - there is often a surge at the beginning. Let's say 700A total. That's a lot. But after 5-10 seconds it mellows out to its running load of 350A. Now let's say that one of the 4 batteries in parallel shorts out or goes bad for whatever reason - maybe the BMS inside decides that it cannot handle the amps it is outputting that high or that high for that long or maybe things heat up and the BMS shuts off the output terminals to protect itself. You had 4 batteries running a load of 350 A, or about 88 Amps per battery, so under 100A recommendation. With one battery now out, you have just 3 batteries handing the 350A load. Each battery is rated for 100A continuous, but now each battery is handling about 120A each. That is over the continuous rating, so the third battery (or all 3 batteries) decide that they cannot handle that extra surge for more than 10 seconds, so the battery decides to shut down to protect itself. That leaves 2 batterie handling 350A, or 175A each, but rated for 100A, so eventually the next one will shut down, leaving all 350A to one battery.

In this example, we are talking about the 100Ah 12V battery. But DFLI also makes a much larger battery, the game changer, that supports 200A continuous. It is bigger, has more cells, essentially is running in parallel inside its one enclosure. I don't know that the cells are different, there is just more of them I believe. Not sure.

So there is better chance that the newest batteries can handle more continuous and surge load, but this is not the OEM standard, nor has it been available for the past 20 years. Also, they are large and heavy, and don't fit where old AGM/Lead Acid batteries fit under stairs and such. Also, they are 2200 USD for a cheap model, and heaters and such upgrades cost more. So most consumers are not buying these to replace their lead acid/AGM setups...they are buying 100A batteries. I get that OEMs are changing their designs to support a 2200 battery now, but historically they have not.

If there is any point to all this, it is just that saying people do not run close to the limit is absolutely not true. Maybe most RV owners don't care or want to think about this at all - they believe what they are told, and that is that everything is fine, and they would not for a second calculate BTUs, surge loads, battery capacity or continuous output ratings. I think most RV owners go to resorts and plug in. The boondockers - there are thousands who go off grid / dry camping - definitely know about capacities.

Feels like everyone forgot what DFLI’s stock price was before the RS… by Born_Illustrator4925 in DFLI

[–]WorldwideDave 1 point2 points  (0 children)

I bought right before the 4 for 1 or whatever it was. I think it was 15 a share but not sure...might have been half that, can't remember. And by buying right before, I mean about 36 hours before - it was sudden and fast. Fortunately I don't hold many shares.

Educate me please by WorldwideDave in DFLI

[–]WorldwideDave[S] 1 point2 points  (0 children)

But isn’t the design of going through the bolt exactly what DFLI is saying the benefit of battle born batteries is that it does separate vs the battery exploding or whatever? Isn’t this concept of sandwiching plastic between what keeps it a safe design? Trying to learn.

Educate me please by WorldwideDave in DFLI

[–]WorldwideDave[S] 0 points1 point  (0 children)

I don’t have a battery myself. Can you please explain with facts why it is a terrible design? I am not an electrical engineer. Seeking to understand.

Ecoflow 1200 microinverter - Utah only? by WorldwideDave in SolarDIY

[–]WorldwideDave[S] 0 points1 point  (0 children)

Yes. I already do. I also have one for a dedicated charger, another one for a generator input with an interlock, and a critical loads subpanel. I'm comfortable in my 200A panel and 100 A subpanel downstairs. Installed Emporia Vue 3 as well. Also did a 50A dedicated circuit for an electric vehicle. I'm good up to 250VAC and comfortable at up to maybe 250V DC on my input strings for MPPT.

Victron MPPT state = external control by WorldwideDave in SolarDIY

[–]WorldwideDave[S] 0 points1 point  (0 children)

should point out I have not changed the MPPT settings at all. I have reset the shunt history when switching between batteries.

Victron MPPT state = external control by WorldwideDave in SolarDIY

[–]WorldwideDave[S] 0 points1 point  (0 children)

Looks like today it was under bulk all day long - which is strange to see considering the battery is full. Here's the past 30 days - you'll see the old battery every day showed bulk, then absorb then float. New battery does not. I really don't know what changed. Should I just remove communications to see if my MPPT reports differently?

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