Dear all,
I would like to introduce you to my new project regarding batteries build up so you can give me feedback and save me some errors. In exchange I will keep you updated of purchases and the experience of assembling the whole system.
The main goal is: To build a 60Ah 12V (4S) LifePO4 battery that can be suitable for manual transportation and that in combination with an inverter can supply max. 500W continuously and comfortably. Expect to use it often at the range 100-200W. Purpose is recreational, so I want to keep expenditure as low as possible.
For that I believe I require:
- A source of energy: 100W 12V solar panel (I already have)
- A charge regulator 50A at least (May already have)
- 4 cells LifePO4 60Ah 3,2V
- BMS 50A at least (with BT for battery control and learning)
- Cables with cross-section between 10-25mm2
- A DC/AC inverter for at least 500W continuous discharge (I already have)
The rough diagram of the system is this one.
Facts and expectations:
- The battery will have 768Wh from which I expect to be able using 80% safely by selecting a proper disconnect discharge voltage.
- I will box the battery but leave big openings on the box to save adding a ventilator. Expect that natural cooling will be enough.
- I expect that so long the BMS stays connected to the battery, the data collection won't be interrupted or reset.
Questions:
- You always recommend the use of fuses. Should I put one between the battery and the regulator? Or you recommend another position? Could you suggest me a fuse to buy? I would like either a very cheap one or a reusable one (If they exist for such currents...)
- Regarding the BMS, I think a Dali one will do as many of you seem to have good experiences with it. Opinions? I have also found a BMS from Aliexpress that looks exactly the same but the brand is Southrol (https://es.aliexpress.com/item/1005002847675894.html?spm=a2g0o.cart.0.0.3e363c0032zVul&mp=1). The 60A model costs 17 euros less with same features. Any experiences with the brand? Southrol does not appear in the forum.
- I have 10 meters of cable with 2,5mm2 cross section, is it a feasible idea that I use 4 cables properly welded on the edges to achieve the required 10mm2 cross section? That would save me some money.
I would like to introduce you to my new project regarding batteries build up so you can give me feedback and save me some errors. In exchange I will keep you updated of purchases and the experience of assembling the whole system.
The main goal is: To build a 60Ah 12V (4S) LifePO4 battery that can be suitable for manual transportation and that in combination with an inverter can supply max. 500W continuously and comfortably. Expect to use it often at the range 100-200W. Purpose is recreational, so I want to keep expenditure as low as possible.
For that I believe I require:
- A source of energy: 100W 12V solar panel (I already have)
- A charge regulator 50A at least (May already have)
- 4 cells LifePO4 60Ah 3,2V
- BMS 50A at least (with BT for battery control and learning)
- Cables with cross-section between 10-25mm2
- A DC/AC inverter for at least 500W continuous discharge (I already have)
The rough diagram of the system is this one.
Facts and expectations:
- The battery will have 768Wh from which I expect to be able using 80% safely by selecting a proper disconnect discharge voltage.
- I will box the battery but leave big openings on the box to save adding a ventilator. Expect that natural cooling will be enough.
- I expect that so long the BMS stays connected to the battery, the data collection won't be interrupted or reset.
Questions:
- You always recommend the use of fuses. Should I put one between the battery and the regulator? Or you recommend another position? Could you suggest me a fuse to buy? I would like either a very cheap one or a reusable one (If they exist for such currents...)
- Regarding the BMS, I think a Dali one will do as many of you seem to have good experiences with it. Opinions? I have also found a BMS from Aliexpress that looks exactly the same but the brand is Southrol (https://es.aliexpress.com/item/1005002847675894.html?spm=a2g0o.cart.0.0.3e363c0032zVul&mp=1). The 60A model costs 17 euros less with same features. Any experiences with the brand? Southrol does not appear in the forum.
- I have 10 meters of cable with 2,5mm2 cross section, is it a feasible idea that I use 4 cables properly welded on the edges to achieve the required 10mm2 cross section? That would save me some money.