Easiest, Safest 12V or 24V Lithium Batteries
Battle Born Batteries 200ah Lithium Bundle - HYPERLINK "https://amzn.to/2tJJSIe"amazon link
Two 100Ah lithium batteries (can easily connect in series for 100Ah 24V)
2000W Victron programmable inverter-charger
30A (up to 720W solar) smart solar charger
Alternator charger
Monitor / partial BMS
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Easiest, Safest 12V or 24V Lithium Batteries
Battle Born Batteries 200ah Lithium Bundle - amazon link
Two 100Ah lithium batteries (can easily connect in series for 100Ah 24V)
2000W Victron programmable inverter-charger
30A (up to 720W solar) smart solar charger
Alternator charger
Monitor / partial BMS


​Battle Born 50Ah (equiv. to 100Ah in 12V) 24v LiFePO4 Battery - amazon link
Cheapest, easiest, simplest way for a 50Ah 24V lithium system
Minimum battery recommendation for a campervan, RV, tiny home

Compare 12V to 24V
12V
Wider range of components available
No voltage converter needed



​12V (Name Brand Lithium)
Built in BMS available, drop-in convenience, don't have to be an expert
Conditional warranty and support
24V (All)
Converter steady 13.8V healthier for 12V components
Smaller wire gauge saves money and smaller, more flexible wires are easier to work with
Double solar charger capacity

​24V Tesla or other Used EV Battery Module
Promotes re-purposing (eco)
Cheaper per kWh / Ah
Smaller size and weight per Kw / amp hour
Can mount on wall - space saver
​Faster charging and higher discharge amps
24V Second Life / Re-purposed Tesla Battery Module Power System
Li-Ion 24V 6S 233Ah (466Ah 12V Equiv.)
DIY Custom Campervan - RV Sample, Updated March 21, 2019
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Clean Illustration
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Components wall mounted under bed, battery wall mounted under sit-stand desk
How Eco-Friendly
Repurposing a used battery that is very toxic if introduced back into the environment
Longest lasting (with proper care)
High performance reduces or eliminates need for fuel powered generator or shore power
​DIY 24V Tesla Battery Power System Essential Parts
24V Tesla Battery Modules
Southwest: Autobahn Dismantling - eBay link
​Midwest: EVTV / eBay gti0037 - eBay link
Europe: k-ash on eBay - eBay link​
Verify 7-pin balancer harness connector
Inspect all fuses (tiny metal wires at the end of all batteries)

​24V, Li Ion Tesla Model S Battery Essential Specs
6 cells (6S) 233Ah for 5032 Watt-hour capacity.
Voltage range: 18.6V soc 0%.  23.1V soc 70%.  24.9V soc 100%
Voltage nominal: 3.8V/Cell, 22.8V/Module
Charge voltage cut-off: 4.2V/Cell, 25.2V/Module (less than all cheap chargers)
Discharging cut-off: 3.3V/Cell, 19.8/Module (less than most inverters allow)
Lithium Ion - Nickel cobalt aluminum oxide (NCA / (LiNiCoAlO2)
Fiberglass Thermal and Fire Protection Blanket
​Wrap the battery to protect from catastrophe and freezing temperatures - ​amazon link
Or you can get a Harbor Freight; use 20% off digital coupon
Looks a lot better - a uniform, shiny tan/amber color

Heater Pad with Automatic Thermostat Control -  12V DC (Converter below) - amazon link
Required if battery will ever reach near freezing temperature while charging​

Main Battery Wiring for 24V System
4 AWG 15' Red + 15' Black Pure Copper Flexible Cable Wire - amazon link   ​
​(or) 2AWG for a spread-out system or high amps (roof A/C, etc.) - amazon link                                                                                                                           

Master Positive Cut-off Switch
amazon link

ANL fuse
200A - amazon link
Install 1' from battery

Bus Bars
Red & Black 3/8" 4 Stud Power Distribution Block with Cover - amazon link


Battery Monitor, Partial BMS (no balancing) and Relays
Victron BT battery monitor BMV-712 w/ temp. sensor - amazon link
Comes with a heavy battery shunt that connects to battery positive terminal

Full-Time Balancer 6S (6 Cell) - amazon link
​​​​6S (6 Cell) Balancer Cable - eBay link
No external power source version

Battery Protect​ (mainly prevents uni-directional over discharge)
Victron 12/24V 220A battery protector - ​amazon link
Not required if voltage will never drop below 19V or you have other low voltage relay
Set display to "2a" = under voltage to 19V (restart 23V)
Also serves as disconnect (pull jumper wire)
To reset and program: Disconnect everything and remote jumper (just pull it out), touch a ground wire to the "program" terminal, hold until "2", then let go, touch and hold ground again until "a" then let go. "2a" should flash. Reconnect pin and cables.

12V DC Fuse Box with Warning Lights
BlueFire 12 Way 30A Blade Fuse Box Board, 24 Fuses + LED Warning - ​amazon link                                                                                                                         ​

24V to 12V Converter - Regulator
Voltage Converter Regulator DC/DC DC 24V Step-Down to DC 13.8V - amazon link
Provides steady 13.8V for 12V accessories (big advantage vs. 12V battery)

24VDC to 120VAC Pure Sine Wave Inverter
​Giandel 3000W, 90% efficient, 1A idle - amazon link
You can't use 120V components when voltage drops below around 20V, but you can use converted 12V components below 20.3V
I tried a similar 2000W inverter and could not handle more than 1,500W

Label Maker
Brother P-touch, PTD210 Label Maker Multiple Fonts and Templates - amazon link
Refills (label maker only comes with short amount; recommend buy the refills at same time as label maker - amazon link

Tips
Microsoft Viseo is good to create wiring diagrams - amazon link.
​Mount battery where you can always keep it above 0 Celsius during any charge; otherwise you must install a heating pad for the battery module.​
Victron BMV-712 Battery Monitor with Bluetooth and Temp. Sensor
Unofficial Settings for 24V, 6S Li Ion Tesla Model S Battery Module
Battery Settings
Battery capacity:  ​233Ah
Charged voltage:  24.1V (aim for 85% SOC)
Tail current:  4.00%
Charged detection time:  3 minutes
Peukert exponent:  1.02 (or Tesla suggestion)
Charge efficiency factor:  99%
Current threshold:  0.10A
Time-to-go averaged period:  3 minutes
Battery starts synchronized:  off​

​Display (your preferences)

Misc - Aux input:  Temperature
Relay Settings (close / clear)
Relay mode:  Default
Invert relay:  Off (off = relay open / active)
(Relay) Minimum closed time:  ​1 minute
Relay-off delay:  0 minutes
(Low / floor) SOC relay:  16%  /  18%
Low voltage relay:  20.6V (or 15%) / 20.7V
High voltage relay*:  24.9V  /  24.6V
High temp relay:  105F  /  100F
Low temp relay:    41F   /   43F

Alarm Buzzer (on / off)
Low / floor SOC alarm: 18%  /  20%
Low voltage alarm:  20.7V  /  20.8V
High voltage alarm:  24.7V  /  24.6V
High temp alarm:  100F  /  97F
Low temp alarm:     43F  /  45F
Notes
Bookmark and check EcoNeato.org/24v.html for improved settings
The BMV 712 measures a battery bank, not individual cells and does not balance.
This is why setting ranges should be conservative in case one cell goes out of balance.
To sync 100% SOC: 1) balance cells, 2) charge to 24.9V, 3) sync., 4) discharge to 24.1V.
Charging Methods
​Solar Charging (Highly Recommend)
Victron 50A (up to 1200W Solar, 24V) MPPT Bluetooth - amazon link
Get this larger one if not sure or plan to add solar later
​Victron 30A (up to  720W Solar, 24V) MPPT Bluetooth - amazon link
Victron 20A (up to  480W Solar, 24V) MPPT Bluetooth - amazon link
​Victron 15A (up to  360W Solar, 24V) MPPT Bluetooth - amazon link
Victron 10A (up to  240W Solar, 24V) MPPT Bluetooth - amazon link​
SPACER

Battery Protect (prevents over discharge)
Victron BatteryProtect 12/24V-65A - amazon link
Also serves as solar disconnect (pull jumper wire)

Experimental Tesla Module Parameters for Victron MPPT Bluetooth Charge Controller
Battery
Battery voltage:  24V
Max charge current: (enter your charger amps)
Charger enabled: (select)
Absorption voltage: 24.40 / max 6h
Float voltage: 24.20
Equalization voltage: 24.40 (not to be used)
​Automatic equalization: Disabled
Temperature compensation: -32.40mV/C
Low temperature cut-off: 4.0 C
​Load output
Operation mode: user def. algorithm 1
User def. algorithm 1: (off<20.50V, on>24.60V)
Load switch high voltage level: 24.60V
Load switch low voltage level: 20.00V​
Notes
Do not leave at below 15% SOC or above 85% SOC (State of Charge) or damage will occur.
It's OK to charge to 100%, but you should quickly use the energy to 85%.
Divide panel wattage by battery voltage to get amps. Add Voc if in series to get the max voltage; Voc of one panel if there are few in parallel
​​
​Alternator to Battery / DC-DC Charging (Highly Recommend)​

​Victron Buck Boost 50A (23A @ 24V) DC to DC charger for smart alternators - $653 PKYS free Priority Mail
Place near starter battery to keep the 12V charging cables as short as possible​
Printer-type USB cable to PC for programming (charger has to be connected to a battery) - amazon link
Choose "Automatic Search and Connect" to connect
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Internal parts (not recommended to open)
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Unoffical Settings - Caution: Experimental Mode
Battery Quick Connect / Disconnect Wire Harness Plug Kit - amazon link
Allows quick removal / relocation of components (chargers, etc.)

Shore Power / Charging (Frequent low solar campsites with power)
iCharger X6 charger / balancer - amazon link
Use with 120VAC / 240VAC to 24VDC Power Supply - amazon link
Fully programmable; balances once on command, not all the time
May take several hours to learn (read the manual - click for PDF download link)
Can balance via shore power to PSU below or plugged into inverter

​  (and)
​120VAC / 240VAC to 24VDC PSU (Power Supply) - amazon link
Use with iCharger X6 - amazon link
Can also be used with EV charge station - detail link

Only use a charger that allows customized charging parameter of 23.8 to 24.4V. Beware of chargers that say they charge at 24V because they may actually charge at 26+V which will eventually cause a fire!
Instead of charger/converter, you can still install a 15 and/or 30A inlet that goes to a breaker box and then to an automatic transfer switch to power 120V appliances (air cond., heater, stove, microwave). This will not charge the battery and then you don't have to worry about over voltage to the battery. By powering all or most of the 120VAC components with shore power, the battery can charge good with minor solar.​

EV (Electric Vehicle) Power Station Charging (Individual preference and availability)
Eco Friendly: Reduce generator and alternator charging and propane dependency.  Details here​
Fueled Generator Power and/or Charging
​(Frequent low solar campsites without power and/or high energy consumption such as roof air conditioner)
First try methods above. If you still need more power, click here to see how to get off the generator.
If you still have to have a generator, Honda and Yamaha make the best, most quiet ones.
Webpage Created Dec. 15, 2018, Tesla Module First Installed & Tested Feb. 1, 2019 in Morro Bay SP, CA

​WARNING AND DISCLAIMER
​Many settings, parameters and configurations are unofficial and in experimental stages.
Installation errors, charging >25.2V, >113F or unbalanced cells may result in damage, smoke, fire and/or injury.
If you often use high amps, you must water cool the battery module and/or add another module.
No guarantees are implied herein; install at your own discretion and risk. Two fire extinguishers recommended.
​​ 
SPACER
Please excuse the redesign
mess on some pages...
Copyright © 1996 to 2019 and to Present, EcoNeato, Eric Talaska
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No legal, electrical or medical advice intended. Seek guidance from a licensed professional first.