SeRiusRod
Member
- Joined
- Jul 4, 2020
- Messages
- 56
Hello people
This is my first post, though I've been reading you for a long time while separating some budget for my build. It has passed some time so my initial ideas are obsolete, and that's why I ask for some recommendations.
My plans were to start with some solar panels and "piggyback" inverters for direct consumption, but now I think it could be better to start with a powerwall system and charge it during low cost grid intervals. I'm software architect and analyst so I host a small lab for myself and have the house pretty connected.In my area, energy supply is a total s**t, and I'm used to lose equipment yearly. The last one was an overvoltage that literally burnt a remoteAP then ran to a trunk switch and fried half of it's ports.
The idea of a disconnected and/or solar powered lab grow, and my first idea is to build a separate phase for electronics and led lighting for the house. The last years total dailyenergy consumption was of 9.5 kwh, it is so efficient.
In my are is not easy to get used laptop/ebike cells, tough theycan be gotten from people in other areas that recycle and resell them. Although risky, I think.
So, do you mind if I ask you some recommendations to start?
For the battery modules, I thought of making 13s5-8p so to stay light and in a wide-spread format, but now I read that 14s is recommended and that the general size is so much much larger.
Is not better to have 48v small modules that can be inserted or removed independently?
Why 14s and not 13s? And what parallel size?
I prefer directly solder fuses on cells vs nikel bars, but I don't know how to design it to a 14s5p format that is usually seen on chinese frames. Any suggestion?
BMS on every module?
What batteries do you recommend? The ones I initially selected have proved to be unreliable with the years.
I cannot post links so what about NCR18650A from NKON?
And those Liitokala NCR18650B from ali are any good?
I also have questions about what's the desired inverter and charger system, but I could wait until I have some batteries already made. Logically I would want them to have some sort of connection for data logging and controlling. I already have a domotics (node-red based) andlogging system with TSDBs
Thanks in advance.
Sergio.
This is my first post, though I've been reading you for a long time while separating some budget for my build. It has passed some time so my initial ideas are obsolete, and that's why I ask for some recommendations.
My plans were to start with some solar panels and "piggyback" inverters for direct consumption, but now I think it could be better to start with a powerwall system and charge it during low cost grid intervals. I'm software architect and analyst so I host a small lab for myself and have the house pretty connected.In my area, energy supply is a total s**t, and I'm used to lose equipment yearly. The last one was an overvoltage that literally burnt a remoteAP then ran to a trunk switch and fried half of it's ports.
The idea of a disconnected and/or solar powered lab grow, and my first idea is to build a separate phase for electronics and led lighting for the house. The last years total dailyenergy consumption was of 9.5 kwh, it is so efficient.
In my are is not easy to get used laptop/ebike cells, tough theycan be gotten from people in other areas that recycle and resell them. Although risky, I think.
So, do you mind if I ask you some recommendations to start?
For the battery modules, I thought of making 13s5-8p so to stay light and in a wide-spread format, but now I read that 14s is recommended and that the general size is so much much larger.
Is not better to have 48v small modules that can be inserted or removed independently?
Why 14s and not 13s? And what parallel size?
I prefer directly solder fuses on cells vs nikel bars, but I don't know how to design it to a 14s5p format that is usually seen on chinese frames. Any suggestion?
BMS on every module?
What batteries do you recommend? The ones I initially selected have proved to be unreliable with the years.
I cannot post links so what about NCR18650A from NKON?
And those Liitokala NCR18650B from ali are any good?
I also have questions about what's the desired inverter and charger system, but I could wait until I have some batteries already made. Logically I would want them to have some sort of connection for data logging and controlling. I already have a domotics (node-red based) andlogging system with TSDBs
Thanks in advance.
Sergio.