What this battery is
The Expion360 GC2 162Ah is a high-density 12.8 V LiFePO4 battery built in the familiar GC2 physical format often used by RVs and marine systems.
The current product name is 12V 162Ah LiFePO4 Lithium Battery – GC2, SmartTalk & VHC, part number EX-GC2-12162-BCH.
For Alaskan campers this is especially relevant because current Alaskan factory material identifies the 162 Ah GC2 as the standard house-battery platform across the current slide-in range, while HS 640 uses two of them as standard.
Nominal energy
Expion360 publishes 12.8 V and 162 Ah, and the current FAQ explicitly states 2,073 Wh nominal energy.
This is useful for comparing battery storage with refrigerator, heater-fan and inverter loads.
Nominal energy is not the same as guaranteed usable energy. BMS limits, temperature, current and reserve settings all affect how much the owner can practically use.
High-density GC2 format
The battery fits a standard GC2 footprint while providing significantly more capacity than traditional 6 V lead-acid GC2 batteries.
Expion360 markets the design as a drop-in physical replacement class for RV and marine battery trays.
MHS explanation.“GC2 footprint” still does not guarantee that every legacy tray, cable angle or hold-down fits perfectly. Physical clearance and terminal access should be checked in the camper.
VHC internal heating
The battery includes Expion360's VHC — Vertical Heat Conduction — internal heating system.
The purpose is to warm the cells in cold weather before normal charging, because LiFePO4 cells should not accept charge when their cell temperature is too low.
The heater is automatic within the battery's BMS logic.
SmartTalk Bluetooth
Bluetooth monitoring through the SmartTalk app allows the owner to view state of charge, voltage, current, temperature and other battery-health information locally.
This is useful when the batteries are installed in a compartment that is not easily visible.
Bluetooth is local wireless communication; it is not by itself remote internet monitoring.
CAN Bus
The 162 Ah GC2 also includes CAN Bus communication.
That allows the battery to exchange data with compatible power-system equipment such as selected inverter/charger or monitoring systems.
A CAN-capable battery does not automatically mean every camper display receives all BMS data. The surrounding components must support and be configured for the same communication system.
Current and discharge ratings
The current product page publishes 150 A maximum discharge and a short pulse capability above that level, while the detailed FAQ separately lists 80 A as the continuous discharge rating and higher short-duration limits.
That distinction is important. MHS does not collapse the manufacturer’s multiple duration-specific limits into one invented “continuous 150 A” figure.
For inverter planning, use the current manual and the exact duration rating that applies.
Charging
The current FAQ lists:
- 14.6 V bulk/absorption,
- 13.8 V float,
- 36 A recommended charging current,
- 72 A maximum charging current.
These settings belong to this exact battery generation.
A generic LiFePO4 charge profile should not replace the Expion360 values without checking the current manual.
IP65 enclosure
The battery is rated IP65, protecting against dust and water jets.
That is useful in an RV environment but does not make the battery suitable for immersion or a compartment with standing water.
Cable entry, ventilation, hold-down and drainage remain installation issues.
Weight and dimensions
Expion360 publishes approximately:
- 260 × 181 × 276 mm,
- 17.89 kg / 39.45 lb.
These figures help identify the battery and plan a tray.
Two batteries, as in the HS 640 standard system, are about 35.8 kg before cables and mounting hardware.
One battery versus several
The current product page states that up to four batteries may be connected in parallel.
Parallel banks require matched batteries, appropriate busbars/cables and correctly designed protection.
Do not assume that because the battery supports parallel use, batteries of different age or state can be mixed casually.
No series connection for this model
The current FAQ explicitly says this battery is intended for 12 V systems and should not be connected in series for 24 or 48 V operation.
This is an important model-specific limit.
Other Expion360 products support higher-voltage systems, but that does not change the rule for EX-GC2-12162-BCH.
BMS protection
The advanced BMS protects against high/low voltage, short circuit, overcurrent and extreme temperatures, and balances the cells.
Those internal protections do not replace external fusing of the camper's main battery conductors.
BMS protection and wiring protection serve different purposes.
Current-generation status
Expion360 still lists the 162 Ah GC2 as the current 12 V GC2 RV product.
That distinguishes it from the Group 27 132 Ah generation and the later 140 Ah Group 27 successor announcement.
MHS therefore keeps GC2 162 Ah as its own component rather than merging all Expion360 heated Bluetooth batteries.
Alaskan 630SI, 650SI and 800SI
Alaskan's current slide-in systems page lists one Expion360 162 Ah battery as a default component for the current slide-in range.
The MHS catalogue currently contains 630SI, 650SI and 800SI for model year 2026, so those models can be linked to this exact battery generation at one-battery quantity unless a specific build says otherwise.
Quantity remains a camper fact; this component card describes the battery itself.
Alaskan HS 640
Alaskan's HS 640 page explicitly lists two Expion360 GC2 162 Ah batteries as standard, for 324 Ah total.
Additional batteries can be selected up to a larger bank.
The technical component relationship therefore identifies the same exact battery, while the HS 640 model record carries the standard quantity.
What to check in an Alaskan camper
Confirm the label EX-GC2-12162-BCH or the exact 12.8 V / 162 Ah GC2 SmartTalk & VHC identification.
Use SmartTalk to confirm battery visibility and compare temperatures across a multi-battery bank.
Check hold-downs, main fuse, cable protection and the charging profile of the converter, solar controller and DC-to-DC charger.
Cold-weather behavior
When the battery is cold, incoming charging energy may first be used to warm the cells.
That means a solar controller showing power does not necessarily mean all of that power is immediately increasing state of charge.
For winter troubleshooting, look at temperature, current and heater/BMS state together.
Key takeaway
Expion360 GC2 162Ah is a distinct high-density 12 V battery with internal heating, Bluetooth and CAN communication. In current Alaskan campers it is a factory battery platform, but system quantity, charging hardware and integration remain camper-specific.
Sources
Exact EX-GC2-12162-BCH current model. Manufacturer page contains different current limits for different durations; MHS keeps duration-dependent limits separate and does not publish a misleading single continuous-current claim.