Lithium house battery comparison
Enerdrive B-TEC Ultra 120Ah vs iTECH120X PRO
Both advertise 120Ah and a 150A discharge figure, making case fit, environmental requirements, integration and actual price the key shortlist differences. The Ultra is lower and wider; iTECH120X PRO is longer and narrower. Equal headline ratings do not establish identical performance.
Specification-based comparison. We have not bench-tested these models. Prices are dated observations, not live offers. Read the manufacturer sources and editorial policy.
Which battery should you shortlist?
Option 1
Enerdrive B-TEC Ultra 120Ah
EPL-120BT-12V-G3
Consider Ultra 120Ah when its case geometry, documented IP67 rating or supported wired monitoring suits the boat.
Option 2
iTechworld iTECH120X PRO
iTECH120X PRO with Bluetooth
Consider iTECH120X PRO when its geometry and lower observed purchase price suit the project, after resolving its weight and installation details.
Battery specifications compared
Manufacturer-published figures, checked 2 October 2026. Missing or contradictory details are identified explicitly.
| Specification | Enerdrive B-TEC Ultra 120Ah | iTechworld iTECH120X PRO |
|---|---|---|
| Exact model | EPL-120BT-12V-G3 | iTECH120X PRO with Bluetooth |
| Chemistry | LiFePO4 | LiFePO4 |
| Rated capacity | 120Ah | 120Ah at 12.8V |
| Published discharge current | 150A at 25°C | 150A continuous |
| Maximum charging current | 100A at 25°C | 100A |
| Dimensions (L × W × H) | 309 × 213 × 170mm (published dimensions) | 330 × 173 × 215mm; 230mm including terminals |
| Weight | 13.59kg | Conflicting source figures: 12.5kg / 13.2kg |
| Ingress protection | IP67 | Confirm exact rating in current manual |
| Monitoring | Bluetooth; CAN/RS485 | Bluetooth |
| Published warranty | 5 years; conditions apply | 5 years; conditions apply |
Enerdrive B-TEC Ultra 120Ah: Use the EPL-120BT-12V-G3 column of the manufacturer's table. A shared Ultra product page also describes other capacities. Confirm terminal clearance from the installation drawing; the listed case dimensions alone do not establish service access. Check manufacturer details ↗
iTechworld iTECH120X PRO: The manufacturer's specification table says 13.2kg, while its quick statistics and FAQ say 12.5kg. We have not resolved that discrepancy or weighed a sample. Ask for the weight and manual of the unit being supplied; do not use a guessed figure for a weight-critical installation. Check manufacturer details ↗
Australian prices and quote checks
Enerdrive B-TEC Ultra 120Ah
$1,254.60 AUD
Manufacturer online price for this exact capacity, including tax; delivery extra. Checked 2 October 2026 using the model's product variant. Promotions may change.
Check price source ↗iTechworld iTECH120X PRO
$629 AUD
Manufacturer online selling price including tax; delivery extra. Observed 2 October 2026. Confirm price and stock before ordering.
Check price source ↗Source links on this page are direct references, not affiliate tracking links. Compare delivered prices on the same day and obtain a separate scope for installation, charging changes and protection.
Compare the same capacity without assuming the same result
This pairing removes the 100Ah-versus-120Ah difference from the smaller Ultra comparison. Start with the shared capacity, then compare the details that change the installation. The batteries' delivered energy under a controlled test has not been measured by Boat Battery.
The discharge figures also need their original labels and conditions. Enerdrive specifies an operating temperature for its figure. A shared number in a table is not evidence that thermal behaviour, protection timing or performance near empty will match.
A low case versus a narrow case
A compartment beneath seating may favour a low enclosure; a slim battery box may favour a narrow one. Measure both the available space and the opening through which the battery must pass. Include the restraint, cable bend and service space in the mock-up.
Use terminal-inclusive dimensions where provided. If one manufacturer's drawing uses a different reference point, resolve that before ordering. Turning a battery to fit also requires checking its permitted mounting orientation, not just its outside measurements.
What would justify paying more?
The captured prices are for the selected 120Ah Ultra variant and the iTECH120X PRO, not the Ultra page's default 100Ah price. This distinction matters when a retailer puts several capacities behind one product page.
A higher invoice may be justified by a feature the installation actually uses, but it does not independently prove better reliability. Ask the supplier to demonstrate the proposed monitoring integration and provide the warranty terms. Compare delivered and fitted totals on the same scope.
Common battery comparison questions
Is this the Ultra 100Ah comparison?
No. This page uses EPL-120BT-12V-G3, the 120Ah Ultra variant, against the 120Ah iTECH120X PRO.
Have both been tested at 150A?
Not by Boat Battery. The table reproduces manufacturer ratings; it is not a comparative load test.
Sources and comparison method
We matched the exact model codes to the manufacturer documents below on 2 October 2026. The selection advice is our interpretation of those specifications. We have not measured capacity, durability, waterproofing or service quality. We do not turn manufacturer cycle claims into a tested lifespan ranking.
- Enerdrive Ultra 120Ah specifications and selected model price ↗
- iTechworld: iTECH120X PRO specifications, dimensions and price ↗
Specifications, offers and warranty terms can change. Match the supplied unit to its current manual before purchase. Report a correction with the model code and source.