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    I could use a little help for my friend with the JBD BMS selection with battery heater pad support

    Regarding the burn through the night, his smallest battery pack is 160Ah x 16 so ~20W/hr should be manageable. He has fish that will die in cold weather if he can't keep the power on. We have unreliable power locally, going 'off-grid' protects his fish. The new battery pack won't take cold...
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    I could use a little help for my friend with the JBD BMS selection with battery heater pad support

    My friend was looking at some YouTube video with a JBD BMS that had an output to drive a couple heater pads for the LiFePo4 batteries. It appeared the heater pads that were attached to sides of the batteries were connected directly to the BMS. Searching Ali Express has turned up some BMS...
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    Wind generator with solar panels?

    As noted above, the voltage spikes from a Wind Turbine will destroy your Solar components if you don't have the parts in place appropriate for it. My friend runs a similar Wind Generator and has a "special" charge controller that dumps the power into a large 48VDC lead-acid battery system since...
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    Our NEW GO-TO LiFePO4 vendor...09.20.21

    Lost in translation apparently.
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    Our NEW GO-TO LiFePO4 vendor...09.20.21

    She can not reply via this website, if you still want to order from her, please just contact Jenny Wu. Our company has rules, same customers can not have two sales.
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    Our NEW GO-TO LiFePO4 vendor...09.20.21

    I never got a response from that email address. The other one was generally answered in about 2 hours. My credit card payment was handled through the other email on Alibaba.
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    Our NEW GO-TO LiFePO4 vendor...09.20.21

    I bought 32 CATL 302Ah batteries from Jenny a while back and tried to order another BMS from Doncan later but, the order was canceled because they have a non-compete clause as explained by Doncan.
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    Our NEW GO-TO LiFePO4 vendor...09.20.21

    Docan is a separate company from Jenny. Jenny only accepts bank wire transfers or credit cards processed on Alibaba. Jenny's products can be picked up at the Docan Power storefront but, they are effectively like a drop-off site for Amazon, FedEx, or UPS.
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    Wanted: Pure sine wave 48VDC inverter (only) > 2,000W

    I have a JBD BMS system for the LiFeP04 batteries so, tying that back to the Inverter is a good idea. Regarding high-frequency inverters, I'm really thinking a low frequency is best for a lot of my loads. My welder runs at a ~10% duty cycle so a low-frequency inverter seems like a much better...
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    Wanted: Pure sine wave 48VDC inverter (only) > 2,000W

    I have looked at the Midnite Solar DIY models which are as you describe. Not a total deal breaker but, my experience with Chinese Charge Controllers has generally been bad. That's why I don't run them on anything that matters and so far have only run Samlex PST series inverters. 1500W is just...
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    Wanted: Pure sine wave 48VDC inverter (only) > 2,000W

    I can get another Samlex PST-1500W 48Vdc inverter but, I'm really looking for something bigger and low frequency to tap my ~35Kwhr of usable battery. High frequency is nice but, the durability of low frequency is attractive on its own in addition to its surge capacity and dealing with sustained...
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    EV's and Batteries

    The backing on the panels we have had in service for ~15 years are reaching their end of life. I expect the acids generated to start cutting traces in a few years. The studies we have seen, suggest the new bifacial panels will last 30 years or more in accelerated tests. Ask me again when I'm...
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    EV's and Batteries

    This ignores the issues of sourcing raw and scarce materials and their costs and impacts on the Earth. Just look at the Atacama Desert as one example of an impact most EV drivers are oblivious to. If all you consider is the cost of energy without any other impacts, then more efficient energy...
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    Our NEW GO-TO LiFePO4 vendor...09.20.21

    Regarding LiFeP04 batteries, I'm glad I got some before they went out of stock. The ones available today suggest when the ones I bought return to the marketplace, they will probably be more expensive than I can reasonably afford.
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    EV's and Batteries

    I lived with a little Kawasaki KLX-250S for ~6 months in my mid-30's and I could pack a week's worth of groceries in one trip. The eggs though had to go in a camping egg-crate to keep from breaking them.
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    EV's and Batteries

    During my time in Europe, Germany and the Netherlands mostly, I did so without a car. The trains there are very convenient and cost-effective when I needed to travel further than I wanted to walk or ride a bicycle. Public transport in the EU is very efficient overall and, urban sprawl isn't...
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    EV's and Batteries

    Most EV buyers are buying the impression of being Earth-friendly without a basic grounding in the science and economics IMHO. The global damage to the Earth acquiring the raw materials for EV cars is overlooked by most people on the EV bandwagon. Then there is the issue of where they get to...
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    Our NEW GO-TO LiFePO4 vendor...09.20.21

    Lithium batteries everywhere I have looked are all up in price or simply out of stock. Lockdowns in China, transportation issues, inflation, and a host of related issues along with classic 'supply and demand' have all pushed prices up a pretty good amount. As existing stocks of smaller...
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    Our NEW GO-TO LiFePO4 vendor...09.20.21

    Mine was on Alibaba. That is how they handle payments on credit cards and PayPal. If you wire direct, you save the Alibaba/Aliexpress fees but, don't have any middleman recourse if things go awry, not that either will of those Chinese companies will protect you.
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    DIY LiFePO4 Cost Analysis - February 2022 Edition

    Alibaba charges a commission plus the credit card fee. Seems like I was about 6% all in. Payment upfront with an in-person pick up in Houston, TX.
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    Our NEW GO-TO LiFePO4 vendor...09.20.21

    Okay, for all the bus bars concerns, where is everyone getting their 200A rated bus bars?
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    Our NEW GO-TO LiFePO4 vendor...09.20.21

    I can confirm that Liticore and Docan are both at Suite 219. I picked up my batteries there and it was a good experience. They are on the back strip of offices from the street a little to the right of the center group of offices which stick out a little from those on either side. I didn't get...
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    DIY LiFePO4 Cost Analysis - February 2022 Edition

    I thought I replied to this yesterday but, I don't see the post. I just bought 32 CATL 302Ah batteries from Jenny/Docan with a pickup in Houston for $143/ea. Delivered I believe they are $160/ea. Price shipped directly from China has gone up recently. My shipping quote from China was ~$800...
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    Our NEW GO-TO LiFePO4 vendor...09.20.21

    I ordered my 200A BMS direct from JBD out of China. I bought my 32 CATL 302Ah batteries from Jenny at the Houston location. The overall cost for Alibaba fees and credit card fees was ~5% based on memory. In my case, the cost of using the bank direct transfer payment and Alibaba/Credit card...
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    DIY LiFePO4 Cost Analysis - February 2022 Edition

    My recent pricing was $120/ea from China without shipping or importation impacts due to docking and unloading issues versus $143/ea in Houston for in-stock batteries. Houston is close enough to me so, it wasn't worth $17/ea for shipping ~4 hours away. Also, the China shipping cost was pretty...
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    DIY LiFePO4 Cost Analysis - February 2022 Edition

    I opted for 32 to reduce the drawdown on one set and give me more headroom for electrical growth in the future. Also, I expect the minerals used in these batteries to become a lot more expensive in addition to inflation price pressure.
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    DIY LiFePO4 Cost Analysis - February 2022 Edition

    I'm working on an order of 32 CATL 302's from Jenny myself right now.
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    DIY LiFePO4 Cost Analysis - February 2022 Edition

    Good luck. The boxes contain 2 batteries and foam. I doubt they will fit your Camry. They deliver for free so, that's the option I am going to take even though I live in East Texas and head that direction 3 or 4 times a year.
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    Our NEW GO-TO LiFePO4 vendor...09.20.21

    The owner of the website is free to do whatever they want with it. Suspending non-paying business accounts seems reasonable. Deleting the wealth of information retroactively seems VERY HEAVY HANDED and poorly thought out. Personally, I will be moving on to a new forum to get the information...
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    Topping off or balancing a set of LiFeP04 batteries?

    (y) Similar to my thoughts!
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    Topping off or balancing a set of LiFeP04 batteries?

    Personally, I would think attaching a resistor in series to the wire would be a lot better than running a really long run of thin copper wire to provide this resistance to unacceptably high current levels.
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    Topping off or balancing a set of LiFeP04 batteries?

    Thanks! Yes, a very flat voltage curve could be deceptive with Multimeter. A 5A digital power supply on Aliexpress is ~$80 delivered so, probably a good investment for $2600 worth of LiFeP04 cells in my case. My friend might be getting some as well so, even a stronger case to invest in a good...
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    Topping off or balancing a set of LiFeP04 batteries?

    How much of an imbalance could something like the JBD BMS handle? How close does the voltage need to be before I really need to buy a power supply to balance them?
  34. S

    Topping off or balancing a set of LiFeP04 batteries?

    I have read a few things that say I would need to top balance a set of LiFeP04 batteries at 3.65V. What sort of constant current and voltage 'chargers' does everyone use? Anything specific recommended or that should be avoided? As I understand it, I would take my 16 batteries and connect them...
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    Saltwater batteries?

    https://greenrockbatteries.com/bluesky-products/ This takes you to the Idaho USA-based website. For those interested, saltwater batteries probably won't be available until the first quarter of 2023 for those of us in the USA.
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