280Ah 16S LFP cells equates out to 14.3kWh...16s 280 ah is 13 kWh a Tesla power wall, or almost 3 of my 5.1 kWh fortress power flex 5.1 kWh
Very interested in learning more about the emphasized part, in particular as to how this can be effectively done in a largish house. I'm much, much earlier on my journey than you and this sounds like a great practical step to learn and work on.But in my case, I didnt just wire up some batteries, I wired up an auxiliary solar circuit to nearly every room of my house. I loved it. Went in full fist.
Firstly, I did it the hard way. Most people would just pull some breakers wires out of their main circuit panel and just use their inverter to feed those circuits. Take 2-4 breakers out, run circuits to auxiliary panel wired from inverter. Put 50 amp breaker in house panel that feeds the inverter. DONE>Very interested in learning more about the emphasized part, in particular as to how this can be effectively done in a largish house. I'm much, much earlier on my journey than you and this sounds like a great practical step to learn and work on.
I am about to build my first system, going for 24V 100ah. I currently have two 100W solar panels, battery cells are next on the list.I bought 4pcs EVE280K from Tewaycell before, and now I want to build a 16S system. At that time, I made the 4S system out of temporary interest.
I feel the same level of satisfaction when I DIY something big. It’s just that I have also learned my limits for how long I can maintain the enthusiasm for a project.I think if you don't enjoy it then buy a battery.
The built batteries ate getting more cost effective with great warranties. Buy the time you do the research on building your own and then sourcing the materials, it isn't really cost effective if you would rather spend your time doing other things even working more to pay for a ready made battery.
But some of us enjoy learning, building, and even spending a lot of time on a DIY Solar Power forum.
For me, the "cost effective" argumant is just a much needed excuse for me to justify my obsessive hobbies to my wife.
Like the important "research" I am doing right now.
Thanks a ton, lots of ideas and research starting points.This is a very simplistic way to put it. You should do a lot of research before doing this.
If I can do it, you can too.
So I think I would probably want to explore this route first, my first goal would be to power my office from the off-grid system; it's nicely isolated on a single breaker I think. I'm not fully understanding how what you describe would work, unfortunately I'm very new to this kind of stuff. Are you saying to take a breaker out (where the circuit I want to move off-grid is) and somehow move those wires to a new panel? No real way to do that without opening up the wall right?Firstly, I did it the hard way. Most people would just pull some breakers wires out of their main circuit panel and just use their inverter to feed those circuits. Take 2-4 breakers out, run circuits to auxiliary panel wired from inverter. Put 50 amp breaker in house panel that feeds the inverter. DONE
If the house panel is not in a basement, yes, it would be a lot harder. Opening a wall or perhaps just putting the inverter, and inverter fed panel right next to the house panel. Then it would be minimal wall busting for that part.No real way to do that without opening up the wall right?
Yes, kinda. This would be approaching the concept of grid tied. This is a rats nest for diy. It includes a lot of extra permitting, vastly more expensive inverter and working with the power company. Could take months...Is there any way to "feed" external power into a circuit in the existing panel?
I don't think that is possible without being unsafe.some sort of special breaker that takes power from another source instead of the back,
@AC/DC if you just want to be able to (manually) switch everything on a single circuit from grid to generator/solar/battery that is fairly straight forward with a manual transfer switch.Thanks a ton, lots of ideas and research starting points.
So I think I would probably want to explore this route first, my first goal would be to power my office from the off-grid system; it's nicely isolated on a single breaker I think. I'm not fully understanding how what you describe would work, unfortunately I'm very new to this kind of stuff. Are you saying to take a breaker out (where the circuit I want to move off-grid is) and somehow move those wires to a new panel? No real way to do that without opening up the wall right?
Is there any way to "feed" external power into a circuit in the existing panel? I realize what I will say sounds unsafe, and I'm not interested in unsafe technologies, but it's just an idea in case something similar exists: some sort of special breaker that takes power from another source instead of the back, so the connections to the grid on the back do not exist and instead it is somehow fed the input thru the front? Even better would be something that would be switchable. And even better would be a special panel where each special breaker would somehow be switchable
I'm just looking for some quick way with minimum intrusiveness to test out my system as it grows. Right now I don't even have panels I'm starting with the battery. So I'm charging it from the grid, but I'd like to see if I can power my office off it. Then I will add some panels with a charge controller.
Regarding the 16S system, I have not purchased cells or accessories yet because I have been hesitant about cells and assembled battery before.I am about to build my first system, going for 24V 100ah. I currently have two 100W solar panels, battery cells are next on the list.
So that beginners like me continue to learn, can I ask you to post pictures of your build and possibly include a parts list?
thank you.
Yes, 16 series cells.What is a 16S system? Sounds like 16 series batteries, but I just don't know.
And relatively the same KWhA 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.
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 58.4What is a 16S system? Sounds like 16 series batteries, but I just don't know.
16 3.2v cells in series gives you a 51.2v (48v) battery.What is a 16S system? Sounds like 16 series batteries, but I just don't know.
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.And relatively the same KWh
Yes, 16 series 48V batteriesWhat is a 16S system? Sounds like 16 series batteries, but I just don't know.
I would not bother with ev packs unless you get them for less than 50eur/kwh. Lifepo4 is already below 100eur/kwh.If you can get used modules from EV's, DIY can save you a lot... For example 2020 and newer Hyunday modules go for as low as 100 EUR/kWh, when buying in small quantities. On the other hand, I would not bother with Tesla modules anymore.
Careful.Yes, 16 series 48V batteries![]()
Yes, the price difference is almost 2 times.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
Luyuan Standout Cons
- 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
EG4 PowerPro Standout Cons
- 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)