Hi everyone, first thanks, for your awesome knowledge community you made, i lurk this forum since a while and i learn a lot from your experience. I apologize in advance for my english.
General project:
I'm a nurse in south of France, and whith this job you can instantly work everywhere at anytime, so why not live on the road in a truck ? I bought an old Iveco, amenaged it, and i will be on the road in one month.
Electrical need:
Laptop, 30w of led, 4G Router, trimix fridge, and time to time short use of powertool ( saw, drill... ).
Roughtly 1.2kWh/Day. The main power consumption is the fridge who can be powered by gaz if there is no sun, and will not be needed in 4-5 month of winter.
Actual setup:
I've mounted two 300w solar pannel on the roof coupled with an Victron MPPT 100/30 actually connected on a shitty 12v40Ah lead acid car battery and a 600w noname non pure sinwave inverter.
Pack Build:
I've 300 18650 above 2Ah from salvage already tested ( and more to come if i need to upgrade my capacity )
First idea was a 3S100P to stick to the 12v system since i've already buy the 12v led and a lot of appliances are easily available in 12v. Problem, i can't find a smart bms with atleast PC communications at an affordable price.
So let switch to 24v and make a 8S40P. I will use standard 4*5 plastic cell holder and solder them with fuses wire.
I don't develop much this part, i will start the construction tomorow, and there is answers to all my questions in lots of anothers topics.
BMS dilem:
Originaly i wanted a 3 or 4S design, and chose this chinese BMS, who the 14S version was reviewed here.
Unfortunaltely, the vendor said: "dear friend : 4S is limited to change the parameters by Buyer because of its low voltage , if the voltage set to small, the Mosfet can not be drived , please know it kindly."
So thats why i decided to switch to a 24v system and 8s version (here )
To be able to edit the settings myself ( lower cell voltage to save cycle etc ).
If you have any better BMS choice to advise me ( 4s or 8s with com function and editable settings ).
One question: on this 8S BMS, the description says that the charge/discharge port is the same. What does it mean praticaly ? Can it charge the battery and provide power to a load at the same time ?
Inverter & DC-DC converter:
For the day to day use, i choose the Victron Phoenix 24V/230 500 VA for it's wide input range ( 18,4v - 34,0v ), but now i need a 24-12v dc converter to supply my light system and maybe other ponctual 12v appliance, i'v already a cheap buck/boost chinese converter up to 300w max ( i will not rise upon 200w for safety ). Maybe i will update it later with a Victron orion 24-12 25A for more reliability ( and peace of mind ) and keep the chinese buck/boost only for ponctual use.
Question: do i need a isolated DC converter to suplying led or a laptop directly in dc or a cheap buck/boost can do the work ?
Safety:
I will made a strong metal case for the battery with inifugate materials inside.
For the electrical safety ( fuses and breakers at different level ) i want a proper electrical pannel but i can't say much now, i need to lurk more before asking question. ( If you have any general documents on it, i will be glad ).
Thanks for reading, see you soon.
General project:
I'm a nurse in south of France, and whith this job you can instantly work everywhere at anytime, so why not live on the road in a truck ? I bought an old Iveco, amenaged it, and i will be on the road in one month.
Electrical need:
Laptop, 30w of led, 4G Router, trimix fridge, and time to time short use of powertool ( saw, drill... ).
Roughtly 1.2kWh/Day. The main power consumption is the fridge who can be powered by gaz if there is no sun, and will not be needed in 4-5 month of winter.
Actual setup:
I've mounted two 300w solar pannel on the roof coupled with an Victron MPPT 100/30 actually connected on a shitty 12v40Ah lead acid car battery and a 600w noname non pure sinwave inverter.
Pack Build:
I've 300 18650 above 2Ah from salvage already tested ( and more to come if i need to upgrade my capacity )
First idea was a 3S100P to stick to the 12v system since i've already buy the 12v led and a lot of appliances are easily available in 12v. Problem, i can't find a smart bms with atleast PC communications at an affordable price.
So let switch to 24v and make a 8S40P. I will use standard 4*5 plastic cell holder and solder them with fuses wire.
I don't develop much this part, i will start the construction tomorow, and there is answers to all my questions in lots of anothers topics.
BMS dilem:
Originaly i wanted a 3 or 4S design, and chose this chinese BMS, who the 14S version was reviewed here.
Unfortunaltely, the vendor said: "dear friend : 4S is limited to change the parameters by Buyer because of its low voltage , if the voltage set to small, the Mosfet can not be drived , please know it kindly."
So thats why i decided to switch to a 24v system and 8s version (here )
To be able to edit the settings myself ( lower cell voltage to save cycle etc ).
If you have any better BMS choice to advise me ( 4s or 8s with com function and editable settings ).
One question: on this 8S BMS, the description says that the charge/discharge port is the same. What does it mean praticaly ? Can it charge the battery and provide power to a load at the same time ?
Inverter & DC-DC converter:
For the day to day use, i choose the Victron Phoenix 24V/230 500 VA for it's wide input range ( 18,4v - 34,0v ), but now i need a 24-12v dc converter to supply my light system and maybe other ponctual 12v appliance, i'v already a cheap buck/boost chinese converter up to 300w max ( i will not rise upon 200w for safety ). Maybe i will update it later with a Victron orion 24-12 25A for more reliability ( and peace of mind ) and keep the chinese buck/boost only for ponctual use.
Question: do i need a isolated DC converter to suplying led or a laptop directly in dc or a cheap buck/boost can do the work ?
Safety:
I will made a strong metal case for the battery with inifugate materials inside.
For the electrical safety ( fuses and breakers at different level ) i want a proper electrical pannel but i can't say much now, i need to lurk more before asking question. ( If you have any general documents on it, i will be glad ).
Thanks for reading, see you soon.