Search results

The "level 2 protection" settings seem off. Set them to overcurrent 120A overvoltage 60000 mv (same) undervoltage 42000mv (4200 is totally wrong) Otherwise I can only suggest experimenting with over/undercurrent and voltage settings to stop the cycling. And make sure your charger isn't doing...

?

I've bought a few BigBattery products over the past few years and they have been solid and reliable. (Although granted, I did not seek tech support from them....) A few months ago my email started receiving sale offers from Battery Evo that were full of "apparent" BigBattery products at massive...

Just an FYI, the project was completed, using an A123 battery pack with internal BMS, and everything posted here: https://www.diyelectriccar.com/threads/the-joys-of-repairing-and-upgrading-an-abandoned-corbin-sparrow.209551/ The A123 pack, MCU and charger ended up being far cheaper than buying...

For those who might be messing with A123 packs or EV conversions, I posted a long thread about my project on diyelectriccar.com with photos and videos. Those A123 packs are really damn nice, very solid and reliable so far, and the Thunderstruck MCU and charger work with them perfectly...

I've got a 4000w AIMS and a 6000W Sigineer. Except for the cabinet and an LCD status display on the Sigineer, they are almost identical inside. The AIMS unit died after running for about 4 months, it was sent back and repaired under warranty. I'm keeping it as a backup. The Sigineer has been...

While you folks are talking about unrelated things and posting jokes, this story is spreading online.....it's all garbage coverage, but still, you just know someone will start waving this around as "PROOF" that LiFePO4 batteries are "deadly". Different incident...

Saw that and it's impressive---but gross overkill for what I'm doing. Plus the output isn't adjustable, only for a 300v battery.

This thing is interesting, but maxes out at 85v. Cheap--perhaps I should just buy one and test.

Recently a couple of A123 lithium packs from a Smith electric delivery truck landed in my garage. They are really nice things: built-in BMSes, CANBUS control, and high energy density in space and weight. Disadvantage: odd operating voltages. They are 26S3P with a unique "proprietary" A123...

I can beat that easily. He posts horror stories about China routinely--now that he's out of China. https://www.youtube.com/@serpentza Don't ask him about BYD electric cars, AT LEAST IT'S FUNNY

Okay, aside from communications, ground isolation and other issues, here's two 48v packs with typical BMSes attached. Where would you put the protection diodes? I'm thinking you are talking about putting them between P- and B-.

before someone mentions this: I've seen it, and 120A isn't enough current, so thanks but no https://www.litechpower.com/product-detail/HCX-D575LF30S120A.html Yes I asked Daly already. They can make something for this, but have a minimum order of 25 pieces. The common 16S or 24S 300A BMS...

Voltage monitoring and some kind of balancing would be good. Don't really care about communications, though that is up to whatever battery charger we end up with. Battery chargers for EVs are another costly and weird area. You can easily get a 48v 1kW charger for about $250 but 96v or more, the...

Threads on this forum (some of them very long and ranty) have beaten on that very subject. Apparently "you shouldn't do that" because if one BMS shuts down, it will have the full 96v of both packs across its internal MOSFET switch. If cheap BMSes had facilities to shut each other off in series...

Referring to this? https://ogm-energy.com/products/rec-master-slave-parallel-pack-kit-builder I went thru the process, and it ended up costing more than $2000 with two slave units and cables. That's more than the equivalent Orion. Let's keep that as a backup possibility.

Soon I'll be into a project that will require voltages greater than the usual 48v seen in solar power. (It is an "extreme" case involving an old EV that ran lead batteries.) The plan was to get LiFePO4 cells to make up a 30S pack for 96v "nominal" and 109v max. Maybe 100AH to start. Source TBD...

more than 1 box available?

you didn't link to Joe's first test of the Rhino and his second test running heavy loads

I've read that the Taycan modules are electrically similar enough to the older Tesla Model S modules that they can use the same BMS. EV battery modules mostly come in odd voltage combinations that aren't usually supported by home power equipment. Unfortunately you will also need an inverter...

holy crap That kid (assuming he's a teenager?) is one of the looniest DIYers I've ever seen on YT. HAVE to assume he is a hoax account like Electroboom. Difficult to tell. https://www.youtube.com/@ianbuilder

crossposting AGAIN..... Warning: I've tested a few flexible panels. The odd-branded ones sold on Amazon and eBay never, EVER come even close to the power outputs they like to claim. Some of them make outrageous claims. A common example are the Yishengyuan panels of about 41x10 inches that many...

Crosspost. Warning: I've tested a few flexible panels. The odd-branded ones sold on Amazon and eBay never, EVER come even close to the power outputs they like to claim. Some of them make outrageous claims. A common example are the Yishengyuan panels of about 41x10 inches that many sellers...

This is because elderly people usually have poor blood circulation to the extremities. They suffer greatly in cold winters and that is why so many of them retire to Florida, southern Texas, southern Arizona or southern California. Long ago in Riverside I saw numerous old folks who would sit...

it is quite possible for some cheap charge controllers to do this when the battery reaches full charge. But it could also be an intermittent defect in the panel. The way to be sure is to apply a fixed resistive load directly to the panel, with controller and battery disconnected, and monitor the...

And there seems to be an amazing load of fools on the DIY Electric Car forum. Building an EV, or even simply converting an old car to electric, is a LOT more difficult than building a solar/battery power system. Yet I see the dumbest questions and answers over there routinely.

That will never happen. At least not in the current regulatory climate. A true industry standard for fast DC charging MIGHT end up being level 3 CCS with the standard connector, but Tesla won't go along, and there will always be other automakers who want to force a proprietary design on its...

No problem finding the original user manual. It says the RJ45 ports are disabled in "ship mode" until the battery is charged. Unfortunately it does not list the SMBus commands or formats. I assume either it's a very simple interface that just sends battery status to the external PC, or you are...

AIMS inverters are okay, I have one myself. One thing: the big ones are "low frequency" types with a big heavy transformer in one end. That transformer runs hot even with no load. The inverter's internal fans don't turn on until a certain load or temperature is reached. I've found that the one...

There will NOT be a BMS in these packs. The 500E is like most other EVs, one BMS for the whole assembly. Nothing can be used separately--you have to get a proper aftermarket BMS to use the cells. But the price is good--might be worth a try. Usually they sell for more like $350 used and "alleged...

This is a gross oversimplification of industry practice. Crimping connectors is faster and cheaper than soldering. Crimping must be done carefully and good practices followed; soldering is no different. Crimping CAN be more reliable for fine wire in high-vibration environments like aircraft or...

https://honestenergy.substack.com/p/the-little-ion-that-could Worth the time--I've yet to see a textbook explain it so clearly.

Many of these cheap Chinese inverters are made by the same few factories, regardless of the name on the box. AIMS inverters are very similar to Sigineer and a few other brands. If yours is like the other brands, there are probably some automotive-type fuses inside on the PC boards. Please note...

Have to agree with the others, if you can possibly afford lithium, then do it. I've tried a variety of "deep cycle" flooded and AGM batteries, and none of them delivered even the 50% capacity for lead. More like 35-40% is typical. And they really do not like to be deeply discharged, frozen...

My experiences have been similar. Very few "professionals" are really all that knowledgable, and none of them wants to anger the electric utility companies. So they feed people who want off-grid capability all kinds of crap "advice" and outright misinformation. Not one of the licensed...