StoreDeal.ai store
Shop
  • Deals
  • Deal checker
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • Use in AI assistants
  • Contact
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.·2222 Ponce de Leon Blvd, Miami, FL 33134·support@deal.ai
TermsPrivacy
Deal.ai › Compare

JMBatteries 48V 100Ah Sodium Ion Battery vs Duracell Ultra Group 27M AGM Marine Battery

These are not substitutes. The JMBatteries sodium-ion pack is a 48V, 4.8 kWh stackable storage bank for solar and off-grid systems; the Duracell Ultra Group 27M is a single 12V 100Ah AGM marine/RV battery rated 620 CCA for engine starting and house loads. Buy the sodium-ion pack for whole-system energy storage; buy the Duracell for a boat, RV or trolling motor that needs a drop-in 12V battery. On build, the sodium-ion unit claims a 10-year warranty and stackable, movable packaging, while the Duracell is a conventional sealed AGM with a broad dealer network and proven marine reputation.

  • Choose the JMBatteries 48V 100Ah sodium-ion battery if you are building or expanding a 48V solar, off-grid or backup storage bank and want a stackable, lithium-alternative chemistry.
  • Choose the Duracell Ultra Group 27M if you need a standard 12V Group 27 AGM battery to start an outboard or run house loads on an RV, boat or trolling motor.

Prices

  • JMBatteries 48V 100Ah Sodium Ion Battery: $1,410.00 at JMBatteries (last seen Nov 10)
  • Duracell Ultra Group 27M AGM Marine Battery: $299.99 at Batteries Plus (last seen Nov 9)
  • Difference: the Duracell Ultra Group 27M AGM Marine Battery is $1,110.01 cheaper than the JMBatteries 48V 100Ah Sodium Ion Battery at the latest prices (Nov 9 and Nov 10)
4
48V 100AH Stackable Super Rechargeable Na+ Sodium Ion Battery

JMBatteries 48V 100Ah Sodium Ion Battery

48V 100AH Stackable Super Rechargeable Na+ Sodium Ion Battery

$1,410.00at JMBatteriesChecked Nov 10
See all prices and details
Visit JMBatteries
Pros
  • About 4.8 kWh per unit in a stackable format
  • Sodium-ion chemistry avoids lithium supply and cold-weather concerns
  • 10-year warranty claim
  • Certified UN38.3, CE, RoHS and MSDS for transport and sale
  • Scales by stacking rather than rewiring a bank
Cons
  • Not a starting battery; no CCA rating
  • Requires a 48V charger, inverter and BMS-compatible system
  • Sodium-ion is a young chemistry with a thin field-service record
  • Fewer installers and less community documentation than lead-acid
  • Large and heavy as a single unit despite the chemistry advantage
Duracell
Duracell Ultra BCI Group 27M 12V 100AH 620CCA AGM Deep Cycle Marine RV Battery

Duracell Ultra Group 27M AGM Marine Battery

Duracell Ultra BCI Group 27M 12V 100AH 620CCA AGM Deep Cycle Marine RV Battery

$299.99at Batteries PlusChecked Nov 9
See all prices and details
Visit Batteries Plus

Store links may earn us a commission. Price via Klarna.

Pros
  • 620 CCA handles engine starting as well as house loads
  • Standard Group 27 size drops into most trays

What separates them

JMBatteries 48V 100Ah Sodium Ion BatteryDuracell Ultra Group 27M AGM Marine Battery
System voltage48V nominal, suited to 48V inverter and solar systems12V nominal, the standard for vehicles, RVs and small marine systems
ChemistrySodium-ion, marketed as a lithium replacement without lithiumLead-acid AGM, sealed and maintenance-free
Capacity and energy100Ah at 48V, about 4.8 kWh per unit100Ah at 12V, about 1.2 kWh per unit
Cranking powerNot rated for engine starting; storage use only620 CCA for starting outboards and inboards
ScalabilityStackable and movable design for growing banksSingle battery; parallel or series wiring needed to expand
Warranty10 years stated by the makerStandard Duracell automotive/marine warranty, typically shorter
Weight and handlingSodium-ion is lighter than lead-acid for the same energy, but the pack is largeHeavy lead-acid Group 27 case, roughly 60 lb class
Certifications and fitMSDS, UN38.3, CE, RoHS; needs a compatible 48V charger and inverterBCI Group 27 footprint fits standard trays and chargers

Price history

  • Duracell Ultra Group 27M AGM Marine Battery: lowest $299.99 on Nov 10 at Batteries Plus.

Prices at every store

JMBatteries 48V 100Ah Sodium Ion Battery

  • JMBatteriesNew

    In stockReturn policy

    $1,410.00Checked Nov 10
    Visit JMBatteries
Prices and history →

Duracell Ultra Group 27M AGM Marine Battery

  • Batteries PlusNew

    In stock

    $299.99Checked Nov 9
    Visit Batteries Plus

Store links may earn us a commission. Price via Klarna.

Prices and history →

Specs compared

SpecJMBatteries 48V 100Ah Sodium Ion BatteryDuracell Ultra Group 27M AGM Marine Battery
Battery Technology—Lead-Acid
Type—Batteries
Batteries—Vehicle Battery
Input Voltage (V)—12.0

Questions and answers

Can the sodium-ion battery start an engine?
No. It has no cranking rating and is built for storage, not engine starting. Use the Duracell for starting and the sodium-ion pack for the house bank.
Can I use the Duracell in a 48V solar system?
Only by wiring four in series, and AGM banks need careful balancing and a compatible charger. A native 48V pack like the JMBatteries is simpler and scales by stacking.
Which lasts longer?
The sodium-ion pack claims a 10-year warranty and is designed for daily cycling. AGM marine batteries typically last a few seasons under deep cycling and need replacement sooner.
Is sodium-ion a safe choice compared with AGM?
Sodium-ion is generally stable and the pack carries UN38.3, CE and RoHS certifications. AGM is proven and spill-proof but vents hydrogen if overcharged, so it needs ventilation.
Do I need a special charger for the sodium-ion battery?
Yes. It needs a charger and inverter configured for 48V sodium-ion or lithium profiles. The Duracell charges from standard 12V marine chargers and alternators.
Which is better for a trolling motor or RV?
The Duracell, unless your RV runs a 48V system. Group 27 AGM is the drop-in choice for 12V trolling motors and RV house loads.

Ask our shopping agent

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

More comparisons

  • LiTime 12V 100Ah LiFePO4 Lithium Deep Cycle Battery vs Duracell Ultra BCI Group 27M 12V 100AH 620CCA AGM Deep Cycle Marine RV Battery
  • 12V 100Ah LiFePO4 Battery vs Duracell Ultra BCI Group 27M 12V 100AH 620CCA AGM Deep Cycle Marine RV Battery
  • 48V 100AH Stackable Super Rechargeable Na+ Sodium Ion Battery vs 12V 100Ah LiFePO4 Battery
  • 48V 100AH Stackable Super Rechargeable Na+ Sodium Ion Battery vs Group 31 - 100Ah Sodium 12V Dual Purpose Deep Cycle Battery
  • LiTime 12V 100Ah LiFePO4 Lithium Deep Cycle Battery vs 48V 100AH Stackable Super Rechargeable Na+ Sodium Ion Battery

Buying guides that pick them

  • Best 12V 100Ah sodium-ion batteries
AGM is sealed, spill-proof and maintenance-free
  • Duracell brand is widely stocked and serviced
  • Works with ordinary 12V chargers and alternators
    • Cons
    • About 1.2 kWh per battery, so large banks need several units
    • Lead-acid is heavy and degrades faster with deep discharge
    • Shorter service life than lithium or sodium-ion in cycling use
    • Needs ventilation and correct charging to avoid sulfation