An inexpensive battery option superior to lead batteries is the SB 12 volt 100Ah LFP
12 volt 100Ah Lithium deep cycle batteries can cost $1000 or more. The SB-12V-100Ah is a robust 12v LFP 100Ah (1280Wh) currently priced at $750 plus tax and with old battery exchange (lead acid)
Designed to be the least expensive and high quality lithium iron phosphate for installation in RV and trailers. MFG in USA
What is the Least Expensive LFP Battery?
LFP refers to lithium iron phosphate chemistry and 100Ah to battery capacity for deep cycling.
The small size of the SB 12V-100Ah is convenient as a direct replacement of common RV & trailer 12v group 24 lead acid batteries. Both batteries are categorized as group 24 size and measure 10 1/8 ” L x 6 5/8″ thick and 9″ tall.
Lead acid group 24 batteries start at $100 ea and last a few seasons. Group 24 lead acid AGM batteries can last longer but even the very best, still have a max cycle life of 1200 cycles to 50% depth of discharge and start at $200 ea.
The least expensive 12 volt lithium deep cycle battery, mfg in USA, currently would be the SB 12V-100Ah priced at $750 ea plus tax and with old battery exchange (lead acid) and a life of use anywhere between 2 and 5 thousand cycles, depending on the temperature, how fast the battery is charged and discharge, and charger quality (amps)
| Electrical Specifications | |
| Nominal Voltage | 12.8 Volts |
| Nominal Capacity | 100 Ah |
| Capacity @20 Amp | 300 Min |
| Energy | 1280Wh |
| Resistance | ≤30m Ω @ 50% SOC |
| Efficiency | 99% |
| Self-Discharge | <3.5% per Month |
| Maximum Batteries in Series | 2 |
| Discharge Specifications | |
| Maximum Continues Discharge Current | 100 Amp |
| Peak Discharge Current | 260 Amp (≤5 s) |
| BMS Discharge Current Cut-Off | 300A±50A(2.2±1ms) |
| Recommended Low Voltage Disconnect | 11 Volts |
| BMS Discharge Voltage Cut-Off | 8.8 V(2.2±0.08vpc) |
| Reconnect Voltage | 10 V (2.5±0.1vpc) |
| Short Circuit Protection | 200-400 ms |
| Temperature Specifications | |
| Discharge Temperature | -4 to 140°F (-20 to 60°C) |
| Charge Temperature | 32 to 113°F (0 to 45°C) |
| Storage Temperature | 23 to 95°F (-5 to 35°C) |
| BMS High Temperature Cut-Off (Discharge) | 167°F (75°C) |
| BMS Reconnect Temperature | 122°F (50°C) |
| Low Temperature Cut-Off (Charge) | 32°F (0°C) |
| High Temperature Cut -Off (Charge) | 129.2°F (54°C) |
| Mechanical Specifications | |
| Dimensions (L x W x H) | 10⅛” x 6⅝ x 9 |
| Weight | 26 Lbs. |
| Terminal Thread | 5/16″ |
| Case Material | ABS |
| Enclosure Protection | IP56 |
| Cell Type | Prismatic |
| Chemistry | LiFePO4 |
| Configuration | 4S1P |
| Charge Specification | |
| Recommended Charge Current | 50 Amp |
| Maximum Charge Current | 100 Amp |
| Recommended Charge Voltage | 14.6 Volts |
| BMS Charge Voltage Cut-Off | 15V (3.75±0.1V) |
| BMS Reconnect Voltage | 14.2 Volts |
| Balancing Voltage | 14.0V(3.5±0.025vpc) |
| Balancing Current | 30±5,mA |
$750 ea plus tax and with old battery exchange (lead acid)
How Long Will the Lithium Battery Power My Devices?
From the typical RV battery set up above, the following devices will have operating time in hours:
Cell Phone 10 watts – 240 hours
30 watt Light Bulb – 85 hours
Refrigerator 150 watt – 16 hours
Fan 20 watt – 128 hours
TV 50 watt – 48 hours
FAQ for the Least Expensive lithium battery for sale
Q: What is estimated lifespan?
A: The battery will have a life of use anywhere between 2 and 5 thousand cycles, depending on the temperature, how fast the battery is charged and discharge, and charger quality (amps).
Q What are the applications?
A: The battery is designed as an energy storage source and easily stores energy from solar, wind, or an AC charger. It can also be used to start small engines (marine, up to 90 HP), ATVs, or used to run trolling motors.
Q: Will the SB 12V-100Ah fit with an Airstream Trailer?
A: Yes, SB 12V-100Ah has a group 24 foot print.
Usable Capacity 1.28 kWh
Depth of Discharge: 100%
Efficiency 98% round-trip
Peak discharge current:
260 Amp (≤5s)
Scalable: Maximum in Series: 4
Parallel: Unlimited
Operating Temperatures
Discharge t°….-4 to 140°F (-20 to 60°C)
Charge t°………32 to 113°F (0 to 45°C)
Storage t°……..23 to 95°F (-5 to 35°C)
Weight: 26 lbs
Dimensions:
L x W x H: 10⅛″ x 6⅝″ x 9″
Terminals
5/16″ Thread
Warranty 5 year