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The short answer on 280ah vs 300ah lifepo4 battery choice: pick the 300ah side for more capacity, since the HumsiENK and NebuQuic listings state 300Ah and the HumsiENK states 3840Wh against the EnerVast listing at 280Ah and 3584Wh. The gap is small, and the listings differ more on monitoring, temperature figures and warranty terms than on capacity. The comparison covers the listings on what each one states: capacity, BMS, cycle figures, temperature limits, size and warranty terms. The 300ah listings win on capacity; the EnerVast answers with a Bluetooth app that shows each cell.
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280ah vs 300ah: side by side
| Solar Score | Capacity | BMS | Warranty | Amazon | |
|---|---|---|---|---|---|
| NebuQuic 12V 300Ah LiFePO4 | 9.7/10 | 12V 300Ah | 200A | 5 years | View on Amazon |
| HumsiENK 12V 300Ah LiFePO4 | 9.7/10 | 12V 300Ah, 3840Wh | 200A | 5 years | View on Amazon |
| EnerVast 12.8V 280Ah LiFePO4 | 9.6/10 | 12.8V 280Ah, 3584Wh | 200A | Not stated | View on Amazon |
Figures in this table are the manufacturer’s ratings as listed, captured 12 November 2026.
Capacity and watt-hours
The HumsiENK listing states 12V 300Ah and 3840Wh, and the NebuQuic listing states 12V 300Ah with no watt-hours figure. The EnerVast listing states 12.8V 280Ah and 3584Wh. The 300Ah listings state more amp-hours than the 280Ah listing, and the HumsiENK is the only listing here that states a watt-hours figure above 3584Wh. Do not convert amp-hours to watt-hours or the other way around: compare each listing on the figures it states.
BMS and protections
Each listing states a built-in 200A BMS. The EnerVast BMS states 20+ protection functions, with low-temperature protection and dust, splash and corrosion resistance. The HumsiENK BMS states protection against overcharge, over-discharge, overcurrent and short circuit, with low temperature protections and an IP65 rating. The NebuQuic BMS states protection against overcharge, over-discharge, overload, overvoltage, overcurrent, overheating and short circuit, with low-temperature protection that activates below -20°C / -4°F.
Cycle figures and temperature limits
Cycle figures need the depth of discharge next to them. The EnerVast listing states 4000+ cycles at 100% depth of discharge and 6000+ cycles at 80%. The HumsiENK listing states 6000+ cycles at 80% depth of discharge, with charging from -5°C to 55°C and discharging from -25°C to 70°C. The NebuQuic listing states 4000+ cycles at 100%, 6000 cycles at 80% and 15000 cycles at 60%, with 10+ years of service life. Compare cycle figures only at the same depth of discharge.
What the listings leave unclear
The EnerVast listing states no weight, no dimensions and no warranty term, and its title claims 6000+ cycles while the bullets give 4000+ at 100% depth of discharge and 6000+ at 80%. The HumsiENK spec table gives dimensions of 11.0 by 6.0 by 12.0 inches, while the bullets give 20.53 by 9.37 by 8.69 inches, so use the bullets. The NebuQuic listing states no watt-hours figure and no weight figure, only 1/3 the weight of lead-acid batteries. None of the listings states a UL, ETL or CSA listing.
The listings compared
| # | Product | Solar Score | Buy |
|---|---|---|---|
| 1 |  NebuQuic 12V 300Ah LiFePO4 | 9.7/10 | Buy on Amazon |
| 2 |  HumsiENK 12V 300Ah LiFePO4 | 9.7/10 | Buy on Amazon |
| 3 |  EnerVast 12.8V 280Ah LiFePO4 | 9.6/10 | Buy on Amazon |
NebuQuic 12V 300Ah LiFePO4
A 12V 300Ah LiFePO4 battery with a 200A BMS, low-temperature protection below -20°C / -4°F, and a 5-year after-sales service.
Pros
- 200A BMS with overcharge, over-discharge, overload, overvoltage, overcurrent, overheating and short circuit protection
- Low-temperature protection activates below -20°C / -4°F
- 4000+ cycles at 100% DOD, 6000 cycles at 80% DOD, 15000 cycles at 60% DOD
- 5-year after-sales service stated
Cons
- No watt-hours figure is stated
- No weight figure is stated, only 1/3 the weight of lead-acid batteries
- No Bluetooth or app monitoring is stated
- No IP rating is stated
Detailed Review
The listing states a 12V 300Ah LiFePO4 battery with a built-in 200A BMS, EV grade A+ cells, a 4P4S internal structure, and low-temperature protection that activates below -20°C / -4°F. It states 4000+ cycles at 100% depth of discharge, 6000 cycles at 80% and 15000 cycles at 60%, with 10+ years of service life, and dimensions of 7.59 by 9.84 by 15.04 inches. The warranty is 5 years of after-sales service. The cycle figures depend on the depth of discharge, so compare on the figure for the same depth.
Who it's for: owners who want a 300Ah battery with stated low-temperature protection and the longest warranty here. Who should skip it: anyone who wants Bluetooth monitoring or a stated watt-hours figure.
Its Solar Score of 9.7/10 comes from performance 30/35, build 21/25, value 21/25, safety 8/10 and warranty 3/5: 83 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Capacity | 12V, 300Ah |
|---|---|
| BMS | 200A |
| Low-temp protection | Below -20°C / -4°F |
| Size | 7.59 x 9.84 x 15.04 in |
Figures as published on the retailer listing, collected 12 November 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. 200A BMS with overcharge, over-discharge, overload, overvoltage, overcurrent, overheating and short circuit protection, low-temperature protection stated, so safety scores 8 of 10. 5 Years After-sales Service stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 3 of 5. See How We Pick.
Battery safety. Charge with a charger and settings that match the stated chemistry, fuse the positive lead as the manual directs, cover terminals, keep within the stated temperature range, and never charge a damaged battery.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
HumsiENK 12V 300Ah LiFePO4
A 12V 300Ah LiFePO4 battery with 3840Wh, a 200A BMS, IP65, stated charge and discharge temperature ranges, and a 5-year manufacturer warranty.
Pros
- 3840Wh at 12V 300Ah stated
- Charge from -5°C to 55°C and discharge from -25°C to 70°C stated
- 200A BMS with overcharge, over-discharge, overcurrent and short circuit protection
- IP65 and low temperature protections stated
Cons
- No Bluetooth or app monitoring is stated
- 63.05 pounds stated
- Cycle figure is given at 80% DOD only
Detailed Review
The listing states a 12V 300Ah LiFePO4 battery with 3840Wh, a built-in 200A BMS, 6000+ cycles at 80% depth of discharge, low temperature protections and an IP65 rating. It states charging from -5°C to 55°C and discharging from -25°C to 70°C, with dimensions of 20.53 by 9.37 by 8.69 inches and a net weight of 63.05 pounds. The spec table gives different dimensions, 11.0 by 6.0 by 12.0 inches, so use the bullets. The warranty is a 5-year manufacturer warranty.
Who it's for: owners who want a 300Ah battery with a stated watt-hours figure, IP65 and stated temperature ranges. Who should skip it: anyone who wants Bluetooth monitoring.
Its Solar Score of 9.7/10 comes from performance 30/35, build 21/25, value 20/25, safety 8/10 and warranty 3/5: 82 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Capacity | 12V, 300Ah, 3840Wh |
|---|---|
| BMS | 200A |
| Charge range | -5°C to 55°C |
| Weight | 63.05 lb |
Figures as published on the retailer listing, collected 12 November 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. 200A BMS with overcharge, over-discharge, overcurrent and short circuit protection, low temperature protections, IP65 stated, so safety scores 8 of 10. 5-year manufacturer warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 3 of 5. See How We Pick.
Battery safety. Charge with a charger and settings that match the stated chemistry, fuse the positive lead as the manual directs, cover terminals, keep within the stated temperature range, and never charge a damaged battery.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
EnerVast 12.8V 280Ah LiFePO4
A 12.8V 280Ah LiFePO4 battery with 3584Wh, a 200A BMS and a Bluetooth app that shows each cell's state of charge, voltage and temperature.
Pros
- Bluetooth app shows each cell's state of charge, voltage and temperature
- 4000+ cycles at 100% DOD and 6000+ cycles at 80% DOD stated
- 200A BMS with 20+ protection functions stated
- Supports up to 4 batteries in series and 4 in parallel
Cons
- No warranty term is stated
- No weight or dimensions are stated
- Smaller stated capacity than the 300Ah listings here
Detailed Review
The listing states a 12.8V 280Ah LiFePO4 battery with 3584Wh, a built-in 200A BMS with 20+ protection functions, low-temperature protection, and dust, splash and corrosion resistance. Its Bluetooth app monitors each cell's real-time state of charge, voltage and temperature and sends an alert when it detects an abnormal condition. It supports up to 4 batteries in series and 4 in parallel. The title claims 6000+ cycles while the bullets state 4000+ cycles at 100% depth of discharge and 6000+ at 80%, so use the qualified figures. No warranty term, weight or dimensions are stated.
Who it's for: owners who want cell-level Bluetooth monitoring and the option to expand to 4 in series and 4 in parallel. Who should skip it: anyone who wants the larger 300Ah capacity or a stated warranty.
Its Solar Score of 9.6/10 comes from performance 29/35, build 20/25, value 20/25, safety 7/10 and warranty 0/5: 76 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Capacity | 12.8V, 280Ah, 3584Wh |
|---|---|
| BMS | 200A |
| Monitoring | Bluetooth app, per-cell |
| Cycles | 4000+ at 100% DOD; 6000+ at 80% DOD |
Figures as published on the retailer listing, collected 12 November 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. 200A BMS with 20+ protection functions, low-temperature protection, dust, splash and corrosion resistance stated, so safety scores 7 of 10. No warranty term, so warranty scores zero. See How We Pick.
Battery safety. Charge with a charger and settings that match the stated chemistry, fuse the positive lead as the manual directs, cover terminals, keep within the stated temperature range, and never charge a damaged battery.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
As an Amazon Associate I earn from qualifying purchases.
Where the points went
The Solar Score weighs performance, build, value, safety and warranty. For LiFePO4 batteries, safety means a battery management system, low temperature protection or another protection the listing names; each listing states a 200A BMS and low temperature protection. The HumsiENK and NebuQuic listings state a 5-year warranty term; the EnerVast listing states none. How we pick explains the weights.
| Product | Solar Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| NebuQuic 12V 300Ah LiFePO4 | 9.7 | 30 | 21 | 21 | 8 | 3 |
| HumsiENK 12V 300Ah LiFePO4 | 9.7 | 30 | 21 | 20 | 8 | 3 |
| EnerVast 12.8V 280Ah LiFePO4 | 9.6 | 29 | 20 | 20 | 7 | 0 |
The Solar Score runs on a 9.2 minimum and a 9.8 maximum, and the weighted point total is placed on that line in proportion, so more points can only raise it.
280ah vs 300ah lifepo4 battery: which should you choose?
Choose the 300ah side if you want the larger stated capacity: the HumsiENK and NebuQuic listings state 300Ah, and the HumsiENK states 3840Wh. Choose the 280ah side if the Bluetooth app matters more: the EnerVast listing shows each cell’s state of charge, voltage and temperature on a phone, and it supports up to 4 batteries in series and 4 in parallel. For cold weather, the NebuQuic states low-temperature protection below -20°C / -4°F, and the HumsiENK states charging from -5°C to 55°C.
| If you need | Look at |
|---|---|
| Largest stated capacity | HumsiENK 12V 300Ah LiFePO4, 3840Wh |
| Cell-level monitoring | EnerVast 12.8V 280Ah LiFePO4, Bluetooth app |
| Stated cold charging range | HumsiENK 12V 300Ah LiFePO4, charge from -5°C |
| Longest stated warranty | HumsiENK and NebuQuic, 5 years |
Sizing Notes
- Match the battery’s stated voltage and chemistry to every charging source: converter, solar controller and any DC to DC charger.
- Check the size before you order: the HumsiENK measures 20.53 by 9.37 by 8.69 inches, and the NebuQuic measures 7.59 by 9.84 by 15.04 inches.
- Keep your total draw under the 200A BMS limit on each battery here.
- Fuse the positive lead as the manual directs, and leave changes to the RV’s electrical system to a qualified technician.
FAQ: power away from the grid
Is a 300Ah battery bigger than a 280Ah battery?
Yes, on the stated figures: the HumsiENK and NebuQuic listings state 300Ah, and the EnerVast listing states 280Ah. The HumsiENK also states 3840Wh against 3584Wh on the EnerVast.
Which battery here has Bluetooth monitoring?
The EnerVast. Its app shows each cell’s state of charge, voltage and temperature, and sends an alert when it detects an abnormal condition. Neither the HumsiENK nor the NebuQuic listing states Bluetooth.
Which battery here has the longest warranty?
The HumsiENK and NebuQuic listings state 5 years. The EnerVast listing states no warranty term.
Can these batteries charge below freezing?
Check the listing. The HumsiENK states charging from -5°C to 55°C, and the NebuQuic states low-temperature protection below -20°C / -4°F. The EnerVast states low-temperature protection without a figure.
Related solar guides
See every LiFePO4 Batteries guide and all Batteries and Charging guides. Also see the 200ah vs 300ah lifepo4 battery comparison, the lifepo4 vs agm battery for rv comparison, the lifepo4 vs agm battery for solar comparison, the best lifepo4 battery charger for boat guide, and the lithium vs lead acid battery for rv comparison.
