Because it seems to criminalize a wide swath of legitimate civilian research. From TFA
high-performance, neural, optical and fault-tolerant, computers,
electronics,
wavelength research (remember, wi-fi was ‘invented’ in Australia),
heat-shielding,
telecommunications,
information security research,
robotics,
human, animal and plant pathogens, both bacterial and viral,
fibre optics,
cryptography.
satellite technology.
sensor technology.
signal and image processing.
composite materials, andthe list could go on and on.
This effectively criminalizes half of all science related activity at colleges. It's not just the best and brightest it's literally asking the A ark to sail in some kind of reverse HHGTG parody.

Because the battery and solar cells will operate at different voltages. To charge batteries directly you would need a dc-dc converter at a minimum.

Nominal voltage is the average voltage over discharge. Often this range is 3-4.2V. Cheap chargers are extremely dangerous as even 4.25V can be hard on cells and anything much over 4.4 is at a greatly increased risk of thermal runaway.

i was expecting some facts. Perhaps some data. I guess facts are too much to ask.

From page 46 of this report Discussions egarding smart grid applications include using automotive battery packs connected to the grid for temporary energy storage, and as emergency power supplies when power is unavailable. There is also considerable discussion in the industry regarding repurposing used or refurbished automotive battery packs for stationary applications such as home level power storage once the packs are no longer suitable for use in vehicles.70 It remains to be seen whether refurbishment of packs will be practical or economical,71 as cells must generally be well matched to provide good performance in battery packs, and aged cells are particularly difficult to match effectively. In addition, for refurbished pack safety, the issue of determining when a cell should be retired will need to be resolved.
tl;dr leading industry experts have the exact same concern for the viability as I have mentioned.

It's more like 5-10 in my state. I wish it was $30 because maybe then asshats wouldn't walk off the street and throw them down my property.

Maybe your state is different. I have tried this it dosen't work where I live. You can take them to the hazardous waste drop off site for your county if you show them your license or other id. I live about 15 minutes away from mine - outside of some rude attitude they do a really good job.

It's less to do with planned obsolescence and more to do with the fact lithium cells of almost any kind tolerate very little overcharge before there is a fire. When you pump out a million packs even one fire can create a lawsuit. If you don't have the safety required by the various regulatory agencies, or compared to average products you open yourself to lawsuits. about the only way out is the hobby market which is about 0% of total battery sales and 98% of total fires (you can google these fires destroying homes, cars, etc with high frequency). Imo some of these e-cig manufacturers are going to get fucked because I've disassembled them and there is next to no protection and I've read about many fires in them also.
yes i googled this ev post vehicle nonsense and all i found were feel good political bs and almost no detail or facts or evidence. They would be better off simply reprocessing the materials and starting over.

It most certainly is true power per weight and volume is nearly useless for backup. The only major first order factor is cost per kWh per year. Glad to hear you say that not only are lithium batteries not really used a lot at any scale but they type used in teslas are not used at all. Thanks for agreeing.

So no source then. I not only have designed lithium battery packs but also the smart battery circuitry for military grade robots. I've also been working with secondary lithium batteries since before you could get them in America, my first orders came from Australia and Asia. For example alone, as a safety system, the majority of battery packs for laptops include a fusable link where upon failure of a single cell it is shorted and burnt out thereby disabling the entire pack. Simply hooking up a new pack or replacing a damaged cell has multiple problems as you need to reset the smart battery firmware (not available over smbus via the laptop) and replacing a single cell throws off the cell balancing (among other things) quite badly. You basically are fucked and need an entirely new battery or years of experience in hacking battery systems and programming firmware.
for Automotive packs you may be able to bypass stacks of cells but then your max charge rate and discharge rate is affected quite badly. Furthermore since you are likely using your batteries quite a bit this would likely require maintenance and therefore cost. It's unlikely the battery pack is dynamically arranged into groups of 2 cells, typically the nominal voltage is 3.6-3.7v depending on chemistry and annode/cathode. For higher voltage packs, you likely lose the whole string for a single bad cell. For example even if you bypassed them and had 10 parallel for the first series battery, you would only have 9 parallel at some point and this would unbalance your whole pack and limit you to 9 series equivelant even with cell balancing (which is usually resistive and not capacitive). This then runs the remaining cells harder and puts exponentially more wear on the already nearly dead battery.

Also id add that if you aren't buying an exact replacement, the battery vendor is not obliged to take your used battery at all. The most common time to replace is around 5-7 years at which time exactly jack squat % of people have their receipt. Responsible people who tried to keep the receipt are likely to recycle properly even if lost whereas the fuck it crowd is around 100% likely to dump it in a pond or trash can because driving 15 miles to dump it properly and free wouldn't be saying fuck it.

Lololololol. They CHARGE you the core charge up front. It's not like they pay for defunct batteries. Unless you plan on buying a new battery the old ones can only be turned in for free at a few select government run locations. People are often faced with paying to dispose of them properly or simply crating a mini environmental disaster. Guess which many choose?

I didn't mean to imply nife batteries are the answer. Merely that burnt out lithium packs pose many problems and even if initially cheap are unlikely to be cost effective in the long run. And yes those packs were only intended to run 8 years it's not just that they likely have sub 70% initial capacity - they are far more likely to fail internally and have much higher internal resistance. Lithium packs not only go bad with age but discharge cycles - they will be cycled once a day in this case making things worse. In fact lithium batteries aren't likely the best solution in general.

I think you just explained why lithium batteries aren't very good for backup, doubly so nearly dead ev packs. The metric to minimize is cost per kWh/year. Including maintaining them. So swapping out failing ev batteries every 1-3 years gets expensive fast compared to a bullet proof long term low maintenance battery. There is a reason so few backup power systems use lithium.

Exactly, tesla batteries are not suitable for economical backup. Hence the bundling comment.

Yes but there is a reason few if any large power backups use lithium technologies of any type. Typically it is lead acids. Using a radically different lithium battery from the tesla wont reduce the cost of tesla packs much and further consumers wont like paying more money up front for less reliable and more expensive solutions just to improve Musks bottom line. Pretty much all lithium batteries are a pain in the ass to work with their main selling point is the power and energy density, both of which are useless for backup.

That's all well and good but what if you are producing power from your solar and your batteries are full? I just am not getting the no grid tie in.