Description
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Power key (for BMS On/Off)
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Terminal fit up to 2 AWG wire
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Create 48 Volt Storage Systems
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Connect in parallel, up to 16 for 81,920 Watts
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Automatic system cell balancing
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All parameters available on LCD display
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Temperature monitoring (high and low cut-off), 6 temperature sensors
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Exceptional voltage stability
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Maintenance-free
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No hydrogen generation or gassing
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<70% the weight of similarly sized SLA batteries
DIY Solar with Will Prowse (store manager) –
have test this one thatn another server rack battery on the market.
had this for about 5 months before publish the video on youtube.
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Leigh (store manager) –
I must say That Kevin and the team were excellent to deal with, they provided accurate information and updates about the shipping, Kevin made the entire process trouble free, even assisting with arranging customs agent in Australia, Highly recommend manufacturer and product range.
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sylvansolar (store manager) –
Solar installer for 18 years.
Best battery I’ve had the pleasure of using, hands down.
All stainless cell hardware.
High quality electronics.
Cell voltage and temp display.
High quality breaker disconnect.
Sturdy rack mountable case.
Will not self disconnect, BMS only balances cells (this is a huge benefit for true off-grid systems).
About 5 or 6 years ago I was looking for batteries for a customer and was horribly disappointed by the locally available batteries for off-grid applications.
So I started looking abroad for quality cells and found this team. I was skeptical at first because china gets such a bad rap in the states, but my customer was Chinese so I asked her what she thought. After talking directly to Emily (my rep) my customer was more than happy to make the transaction. After we received the batteries, I was genuinely impressed and even giddy at the high quality and new possibilities this battery enabled.
As far as negatives, I can’t think of any.
This battery and it’s chemistry have massive advantages over most other widely available types and here I will explain why.
LiFePo4 loves to accept charge.
So imagine that charging a typical battery is analogous to winding a spring. As the spring is wound with more energy, it takes more force to wind it further. Similarly, as a typical battery fills, it starts to heavily resist further charge. But not so much LiFePo4, instead a lithium iron phosphate (LiFePo4) is much more analogous to filling a balloon with water. The resistance remains steady as the balloon fills, until it reaches full at which point resistance peaks rapidly. LiFePo4 can charge extremely fast without the potential for thermal runaway, at all, period, don’t ask how I know 😜.
So what this means in the real world is that when you have less than ideal solar conditions, say a cloudy day, a system using a lead battery bank, often can not charge fully without excessive solar panels. This is because it must be fed more energy to counteract the resistance increase as it charges. But LiFePo4 will absorb much more willingly and rapidly, meaning that on a day with less sun or intermittent sun, this battery will charge much more than lead or even many other widely hyped lithium batteries including simpliphi and Tesla.
Tesla, for instance, is all hype in my opinion and far overpriced as well as not even being truly off grid capable, being only proprietorily controlled or repaired, having high and dangerous battery voltages, and thermally unstable meaning they can burst into flames and create a feedback loop of flammability known as “Thermal Runaway”. Imagine a potentially self igniting molotov cocktail attached to the side of your house…
Just like all those phones in people’s pockets that blew up.
No thanks.
Simpliphi is another similar yet vastly inferior popular product. For instance, simpliphi has a cheap flimsy case, cheap flimsy electronics, it’s cells are unrepairable, it’s prone to needless self disconnect and programming conflicts with outback and other inverters, the cells are non stainless and highly rust prone making it extremely flood vulnerable, and a virtual moisture damage magnet. I’ve seen first hand what happens when a simpliphi sits in only one inch of water for a day (spoiler: it breaks permanently ).
I have been installing this LiFePo4 server rack battery now for over 5 years and I have not only had zero problems with any of the batteries, I haven’t even received a call back for a single issue at all with any of them. If you install for a living or just want to live a trouble free off grid life then you know how valuable that is.
Buy these batteries, you won’t be disappointed.
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Joe Eyre (store manager) –
fast reply, answer my questions with patient, good team to cooperate with.
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Steve Spiro (store manager) –
I ordered 12 of their 48V server rack batteries in two orders of 6 each. They were received as and when promised. They were packed well (on pallets) and arrived with no damage.
The support staff has been available to answer my questions promptly via email and provided support and warranty replacements for a couple of under preforming cells.
They have a high quality build which is why I purchased them in the first place and excellent price and continue to make improvements in this product. The built in screen saves you thousands on unneeded monitoring equipment because you can check each battery’s SOC, rate of charge or discharge, individual cell voltage and the temperature sensors and more all from the screen built on each battery.
My power wall build is still in process and consists of two banks totaling 60 kWh I have 50 kWh just over 1000 Amps already installed and it has worked like a charm for almost 60 days of completely cycling them every 24 hours. Attached is a pic of the system so far but it is still a work in progress. I plan to make updates.
Andres S. (store manager) –
Reliable, good safety protections and smaller size battery than any in its wh size.
Chris Hanekamp (store manager) –
Rack has great fit , form and function. I feel my battery investment is secure and protected !
Lee S. (store manager) –
Battery 🔋 arrived safe and on time. Packing was great. They are heavy, have a friend or two to help, have your space ready.
Unit
Mine have a 104.3 ah and a 103.6 ah, the cops between the two works well, pc interface is monitor only as far as I can tell.
I have mine hooked up to a EG4-6500 ex. The BMS communication to the inverter works but has shut the inverter off twice in 5 days, went back to user and will wait and see. The batteries stop charging when they hit thier Ah max(varies by battery????). Screen and inputs for on battery is good buttons have a firm click. I think the screen would be better if moved to center of unit, as cables will be in the way of your screen.
Larry Kapp (store manager) –
The battery is okay , I only give it a 4 star rating because I did not do my own research better on it’s specifications. I should have realized from research that this model has an AC breaker instead of the more appropriate DC breaker. Jakiper told me that this is only secondary protection in that the bms will be primary. So maybe it is okay as an on off switch for main power but not appropriate for shutdown under load because of arcing that an AC breaker is not designed for. Of course it would only be in an emergency that one would shut off a breaker like that under load manually and it would shut off the load .
I have it installed the battery and it is working okay though it is still breaking in and balancing cells. I have been watching the available monitoring software closely to see how everything behaves. It is very good software that lets you see each cell voltage and when they are in a balancing condition. I also like that the software also shows the state of charge . This corresponds almost exactly with the Midnite controller state of charge that I set up to the battery capacity. And it is nice that you can see the current of each battery if it is charging or discharging. I have three batteries so it is very useful. So good on the free monitoring software. But it will take time for the recommended 30 cycles of the battery for me to evaluate this battery in the long run. Coming from using lead acid batteries in the past, these lithiums are so nice in that you can charge them with more power at once compared to how charge would taper off on lead acid. This will be helpful in my northern climate where we have shorter days in the winter but get some good sun when the batteries can charge more quickly . All in all the build quality seems pretty good – I have had no issues so far.
Jakiper has been responsive in answering any questions I have when I email them. Initially I had questions about shipping , but later on about some of the charging setup for my controller. It would be nice if they had written up a bit more detail of operations for their owners manual. But the manual that came with it does have the most important info and nice that it shows the pinouts for the communications jacks. Jakiper has been making update videos to explain to people how to do certain things that were not in the manual – like how to program the bms to communicate with certain inverter chargers.
Anyway so far so good with the Jakiper batteries.
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Tom W. (store manager) –
Overall it’s worked great for the last six months. I use the battery at my off-grid property for solar storage. I use it pretty heavily: discharge at least 50% most nights, and in the summer the shed its stored in gets to 110 degrees regularly. Not a hiccup so far — we’ll see how long the chemistry lasts in those conditions.
I had one issue early on — my hybrid inverter (a Growatt unit) had a default low cutoff voltage below the low cutoff voltage of the battery. This discharged the battery and then it shut off. Unfortunately, my inverter would not charge it again until it detected a voltage — but the battery wouldn’t re-enable the terminals until _it_ detected a voltage. They’re both being too “smart”. I had to buy a DC power supply to charge the battery again, forcibly, at 58V. Once it surpassed its low voltage cutoff all was well. I adjusted the inverter’s low voltage shutoff to be _above_ the battery’s, and haven’t had an issue since.
I had a second issue that arose only because of the first: in my attempts to figure out why the battery was seemingly completely dead, I triggered the anti-theft alarm. Very annoying — battery goes dead if the accelerometer is tripped. It’s labelled “T Sensor” — the T is for “Theft” not “Temperature”!
Jakiper battery was very kind and helpful when I reached out to them. They mailed me a serial / USB cable for free, which (along with their software — Windows only, *nix users beware!) which I was able to use to disable the theft detector. Honestly I do not want this anti-theft feature and I encourage them to remove it or make it optional in future models.
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Marco B. (store manager) –
Battery is working out great, and the screen comes in handy. I was able to pick the battery up right form the warehouse, easy peasy.
Allen (store manager) –
I ordered qty 10 of the 4U | JK48V100PRO 51.2V 100Ah Server Rack LiFePO4 Battery’s. They arrived in a large plywood crate and were in perfect condition, well packed. The sales team and support team were very responsive and informative when I had a few questions. They came with good quality cables and each battery had a separate test sheet inside each box. They came with about a 60% charge and I used the 48V charger to top off each one before initial hookup. Took about 2 days to get them all up to full charge individually. The terminal connections are very solid and hold the cables well. I also purchased two of the 4U / 5U racks and they were also very good quality. After pulling out my 24 2v Rolls Surrette bank I quickly had these hooked into my system and up and running. I have a 14KW solar array broken into three legs that run into 3 Midnite Classic 150s that charge these batteries. These batteries tie into 3 MagnaSine Inverter Converters giving me about 120 A/C Amps to power a 100 amp service into my home. They charge quickly, have minimal heat output and are much cleaner than the lead acid’s I had before. Only maint I need to do is dust them off once in a while. BMS is easy to work with and the system looks good next to my other setups.
Richard Witt (store manager) –
Early in 2022 I ordered one 48 volt battery basically to test the waters with the company and their product. I was totally impressed with both and I recently ordered and received three more batteries.
The sales team, Zhoulun and Emily, were extremely helpful and communicative throughout the process.
As I am not too far from their warehouse in LA/Long Beach, I opted to pick up my batteries directly from the warehouse, saving the shipping charge. The warehouse personnel were very efficient and helpful both times.
I wholeheartedly recommend Jakiper Battery/OPSolar and I will use them for future solar related purchases.
Richard
charles george (store manager) –
This is a very good battery and well worth the cost, the company has been excellent to communicate with. I highly recommend this battery
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admin (store manager) –
Still got place to add more batteries right?
Steven S. (store manager) –
These batteries work well. I have 11 in parallel that I have cycled every day for months.
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Jon A. (store manager) –
Very well built and high quality battery that is very reliable and completely maintenance free. I have two that see constant daily use providing me with the power I need. The batteries are very easy to install and use. The screen allows me to see the status of the battery and individual cells from voltage to temperature, it is all there. These batteries will work with any solar equipment making them very versatile and they are also a terrific value for the price. I highly recommend them.
Mark Rohrlach (verified owner) –
Jakiper Batteries are great we love them.