Lithium house battery comparison
Invicta Xero 100Ah vs 200Ah: Boat Battery Upgrade
Xero 200Ah doubles nameplate capacity and increases the maximum discharge figure from 150A to 200A. It also needs a longer case space and more terminal clearance. The right size depends on measured demand and the opportunity to recharge.
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
Invicta Xero 100Ah
SNLX12V100BT
Shortlist Xero 100Ah when it provides the required reserve and fits the load limits, avoiding unnecessary size and mass.
Option 2
Invicta Xero 200Ah
SNLX12V200BT
Shortlist Xero 200Ah when measurements justify more storage and the access route, restraint and charging plan accommodate it.
Battery specifications compared
Manufacturer-published figures, checked 2 October 2026. Missing or contradictory details are identified explicitly.
| Specification | Invicta Xero 100Ah | Invicta Xero 200Ah |
|---|---|---|
| Exact model | SNLX12V100BT | SNLX12V200BT |
| Chemistry | LiFePO4 | LiFePO4 |
| Rated capacity | 100Ah at 12.8V | 200Ah at 12.8V |
| Published discharge current | 150A maximum | 200A maximum |
| Maximum charging current | 100A | 200A |
| Dimensions (L × W × H) | 308 × 168 × 211mm; 220mm to terminals (±2mm) | 485 × 172 × 231mm; 247mm to terminals (±2mm) |
| Weight | 12.5kg | 23.0kg |
| Ingress protection | IP67 | IP67 |
| Monitoring | Bluetooth; CAN/RS485 | Bluetooth; CAN/RS485 |
| Published warranty | Confirm current Xero terms with supplier | Confirm current Xero terms with supplier |
Invicta Xero 100Ah: Xero SNLX12V100BT is different from Invicta Black, Compact and the older SNL12V100S. The datasheet distinguishes case height from terminal height. Its maximum discharge rating is reproduced as labelled, rather than silently relabelled as a tested continuous result. Check manufacturer details ↗
Invicta Xero 200Ah: SNLX12V200BT identifies this Xero model. Do not transfer specifications from a different Invicta range or capacity. Maximum charge current is an equipment limit, not a recommended charger setting; use the applicable manual and complete system design. Check manufacturer details ↗
Australian prices and quote checks
Invicta Xero 100Ah
$1,099 AUD RRP
Manufacturer recommended retail price including GST, not a dealer quote or confirmed selling price. Checked 2 October 2026.
Check price source ↗Invicta Xero 200Ah
$2,099 AUD RRP
Manufacturer RRP including GST, checked 2 October 2026. This is not a confirmed dealer selling price. Obtain a delivered quote for the exact model.
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.
Use a daily energy log to justify the extra capacity
Record a representative departure day, overnight period and following morning. Separate energy consumed from energy returned by solar or the engine. Otherwise a sunny test day can make a small battery appear to have more autonomy than it actually provides.
The extra 100Ah is a nameplate difference, not a guaranteed additional day. Apply the operating reserve selected for your installation and include loads beyond the fridge, such as communications, lighting and pumps.
Installation access changes more than the label
The 200Ah model is substantially longer, and its datasheet specifies a higher terminal-inclusive height. Confirm the complete access opening and the space above the terminals before assuming an existing 100Ah compartment can be reused.
Both models have documented wired communication, but replacing a battery still requires checking configuration. Capacity-dependent monitoring settings and the approved operating limits should be recorded during commissioning rather than copied blindly from the old pack.
Compare autonomy with recharge time
A larger battery makes it possible to accumulate a larger energy deficit. At the same net charging rate, replacing that deficit takes more time. A useful upgrade plan includes the cloudy-day recovery scenario, not just the full-battery departure scenario.
The manufacturer's maximum charge rating is higher on the 200Ah model, but that does not increase the output of an existing charger. Compare your available charge sources with the actual cruising pattern before spending on additional storage.
Common battery comparison questions
Is the 200Ah Xero the same physical size?
No. Compare the length and terminal-inclusive height in the exact-model table before purchase.
Does a larger battery fix inadequate solar?
It can extend the time before a shortfall becomes a problem, but it does not generate the energy missing from the daily budget.
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.
- Invicta: SNLX12V100BT specification sheet ↗
- Invicta Australian range and GST-inclusive RRP ↗
- Invicta SNLX12V200BT specification sheet ↗
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.