PotusGobbleBottom
Corn Pop was a bad dude.
Yes, 16 series cells.
There is a lot of shorthand around here. Feel free to ask, just as you did.
Continuing DIY or give up DIY to buy already assembled battery?
- Thread starter Rain@
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There is a lot of shorthand around here. Feel free to ask, just as you did.
A Luyuan 16S DIY battery box with 150A JK Inverter BMS + screen + EVE LF280K matched cells will run you about $1900 shipped to the USA.
An EG4 PowerPro is $3800 + freight which costs at least another $300 so a total of $4100.
So the cost savings are obviously still significant.
Luyuan Standout Pros
EG4 PowerPro Standout Pros
An EG4 PowerPro is $3800 + freight which costs at least another $300 so a total of $4100.
So the cost savings are obviously still significant.
Luyuan Standout Pros
- Everything user replaceable
- A JK BMS
- Over 50% cheaper
- Not UL Listed or "approved"
- Have to wait 60+ days for delivery
- Have to put it together yourself although all the pieces are provided
EG4 PowerPro Standout Pros
- UL Listed
- Looks nice/modern/clean
- Has built-in heater (is questionable how low of temp it can handle for charging since there is no insulation)
- Has built-in extinguisher
- Price as I listed for the Luyuan has only a 150A BMS instead of 200A in PowerPro
- Outdoor rated
- Not user serviceable
- Price
- BMS: 100A default charging limit, passive balancing of cells (some may or may not consider this a con)
PotusGobbleBottom
Corn Pop was a bad dude.
And relatively the same KWh
16 cells in series at 3.2V per cell gives you a near 48v battery at 52.1V with a voltage range of 2.5V to 3.65V, the battery voltage ranges from 40V to 58.4
16 3.2v cells in series gives you a 51.2v (48v) battery.
The Luyuan box with EVE LF280K probably comes out higher since those cells have consistently tested well above 280Ah (let's use 290Ah to be conservative). That comes out to $128/kWh (290Ah * 51.2V = 14,848 Wh and $1900/14.848kWh). PowerPro using 280Ah would be $4100/14.336kWh or $286/kWh. Would also be helpful if someone posted link to anyone who has capacity tested the PowerPro battery.
Yes, 16 series 48V batteries
I would not bother with ev packs unless you get them for less than 50eur/kwh. Lifepo4 is already below 100eur/kwh.
EV packs often have difficult voltage range and disassembling them to new confiquration is difficult. For example most VW packs are either 8S or 12S whereas you would typically need 14S to match the voltage range of 48v(nominal) inverters.
Also actually buying any EV packs is time-consuming scavenge hunting…
Careful.Yes, 16 series 48V batteries
The way you have it written, could imply 768V setup...
16S system means 16 x 3.2V LFP making a 51.2V battery.
Yes, the price difference is almost 2 times.
Are there any professional installation technicians in the comments section? If you DIY this system for customers, how much is the installation fee?
i think the premade packs would be better compared to raw cells in combination with a box kit like the seplos mason (or something similar). the premade eg4 is $3400+, where the new cells+box combo is over 35% cheaper at somewhere around $2200 for the same capacity.
I priced out a 16S w/ 304Ah EVE cells w/ Seplos 200A BMS, box & display and it's just shy of $2k shipped to the center of the country. It's approaching 50% cheaper (or, distancing itself from 50%? looks like prebuilts are dropping at a slightly faster rate than full DIY kits).
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you definitely found way better pricing than i could, though i just priced the entire mason kit directly from seplos and unused cells from 18650batterystore.
i think we will see prebuilts prices drop at a faster rate because there are still higher margins, as the supply options are limited but are growing every week. but i think diy kits will definitely still be a substantial cost savings. at least thats my take on it.
shadowmaker
Solar Addict
You are comparing DIY to UL listed premade. Why not compare DIY to non UL listed premade: OP claims LFP 14,33kWh wall mount under 150$/kWh all included with US based stock
I really hope these kind of batteries are getting more available to US, because currently you are getting screwed by vendors over there.
I’m stubborn and sometimes an idiot, so I chose to DIY as much as possible.
In reality, I don’t look at it as work. I can be at home in the shop working at my leisure , chit chatting with the family, babysitting the bbq, or watching the tv at the same time. It gives me something productive to do/look forward to rather than idle time or less than productive time
I wanted to learn as much as possible in the process so that I could understand and assess troubles in the future.
I did save significant money in the process, I paid less than 7k for 60kwh of battery, but prices on prebuilts keep coming down. In the future I will just buy user serviceable prebuilt batteries.
In reality, I don’t look at it as work. I can be at home in the shop working at my leisure , chit chatting with the family, babysitting the bbq, or watching the tv at the same time. It gives me something productive to do/look forward to rather than idle time or less than productive time
I wanted to learn as much as possible in the process so that I could understand and assess troubles in the future.
I did save significant money in the process, I paid less than 7k for 60kwh of battery, but prices on prebuilts keep coming down. In the future I will just buy user serviceable prebuilt batteries.
PotusGobbleBottom
Corn Pop was a bad dude.
LOVE this attitude. I share it with you. I love learning at my own pace with a nice payoff at the end.
Ampster
Renewable Energy Hobbyist
I spent a lot of time putting together my pack at two homes. First it was 32 LF280 cells at one home. Then after I purchased another 16 cells we decided to move to another home. I had not pulled a permit on that system so I disconnected the inverter and moved the cells to the new home. After pulling a permit for a 8kW grid tie solar system and a new main service panel two years ago I installed the inverter and the pack of 48 cells. This year I resolved to get the SolArk system permitted as well. The only practical way to do that was to use UL listed batteries and so I sold my LF280 pack and installed four Pytes V5 rack mount batteries in an external enclosure. I am done with the install and cleaning up that part of the garage so as not to distract the inspector and plan on calling for inspection next week. My motivation was not the time or the cost but the desire to finally have a fully permitted system.
I wonder, is there a way to get a DIY system inspected in some fashion so that it can be permitted? Ultimately, the prebuilts use the same cells, they just build it to a certain minimum standard, apply for UL listing, get it approved and then it's listed. Much how an inspection checks install, could something like that be done for DIY batteries? For example, I'm likely gonna build a battery with a case from China, where everything is made anyway. I will probably go above and beyond the minimum required, like install better bus bars, cabling, and internal-to-the-pack fuses which are not part of the standard build blueprint. It'd be a shame not to be able to get it permitted.
zanydroid
Solar Wizard
Nope, not allowed currently. They don't even allow you to build your own UL9540 system out of UL1973 batteries.
They won't even send an inspector out to retroactively bless a factory-built unit sold prior to completing UL testing, without a massive ceremony (if it's not impossible).
If you were a big commercial or industrial site you could go an alternate route involving a team of engineers to certify the bespoke ESS that you are building
PotusGobbleBottom
Corn Pop was a bad dude.
THIS is utter BS.. Fricken gestapo.
