Marine starting battery comparison
Century Marine Pro 780 vs 1000: Starting and Reserve
The Marine Pro 1000 raises the published starting ratings, but both models list 100Ah and 180 minutes of reserve capacity. It is also longer and taller. The upgrade is primarily a starting-rating and fitment decision, not evidence of longer accessory runtime.
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
Century Marine Pro 780
N70ZM MF / 133102
Consider the 780 if its starting specifications meet your engine's requirements and its lower case height suits the compartment.
Option 2
Century Marine Pro 1000
86M MF / 135104
Consider the 1000 if the engine or installation calls for its higher starting ratings and the larger case can be secured correctly.
Battery specifications compared
Manufacturer-published figures, checked 2 October 2026. Missing or contradictory details are identified explicitly.
| Specification | Century Marine Pro 780 | Century Marine Pro 1000 |
|---|---|---|
| Exact model | N70ZM MF / 133102 | 86M MF / 135104 |
| Application | Starting and semi-cycling | Starting and semi-cycling |
| Rated voltage | 12V | 12V |
| Rated capacity | 100Ah at the 20-hour rate | 100Ah at the 20-hour rate |
| CCA at −18°C | 780A | 1000A |
| MCA at 0°C | 1000A | 1200A |
| Published reserve capacity | 180 minutes | 180 minutes |
| Dimensions (L × W × H) | 305 × 171 × 202mm; 225mm total height | 330 × 172 × 218mm; 242mm total height |
| Weight | 25.1kg | 25.0kg |
| Terminals | Twin; polarity D in manufacturer diagram | Standard / wing nut; check diagram |
| Published warranty | 24 months; conditions apply | 24 months; conditions apply |
Century Marine Pro 780: The brochure gives starting and semi-cycling specifications. Check the engine maker's battery requirements and the actual tray, restraints and terminal orientation; engine horsepower alone is not a fitment approval. Check manufacturer details ↗
Century Marine Pro 1000: Marine Pro 1000 is the 86M MF model. The 1000 in its name refers to its CCA rating, not amp-hour capacity. Check the engine manual rather than treating generic horsepower marketing as fitment approval. Check manufacturer details ↗
Australian prices and quote checks
Century Marine Pro 780
Current price not verified
The manufacturer brochure does not provide a retail price. Request a quote for the exact item number, including delivery and any fitting charge.
Check price source ↗Century Marine Pro 1000
Current price not verified
Ask for a delivered or fitted quote for Century item 135104. No retail price is published in the cited specification source.
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.
The model number is not amp-hour capacity
The 780 and 1000 names align with their CCA figures. They do not mean one stores 780Ah and the other 1000Ah. In the cited range table, both have the same Ah and reserve-capacity entries.
That distinction matters when a boat owner wants to run accessories longer. A higher starting figure does not, by itself, solve an overnight energy requirement. Separate the engine-starting requirement from the house-load calculation.
More starting capability, more case clearance
The 1000 case is longer and has greater total height. Check the battery box lid, cable bend and restraint rather than treating the similar width as a promise of compatibility. A terminal close to a conductive lid is not a minor fit detail.
Use the current engine documentation to establish what ratings and battery type are required. Broad engine-size marketing cannot cover every model, temperature, starting arrangement or manufacturer condition.
When a different system is the better question
If the concern is avoiding a flat starting battery after running electronics, ask whether the accessory supply and starting reserve should be separated. Simply selecting the higher CCA number leaves the same underlying operating habit unchanged.
For either replacement, obtain a price that identifies the exact Century item number and what fitting includes. The manufacturer sources here do not provide a verified current retail price, so this page does not invent one.
Common battery comparison questions
Does the Marine Pro 1000 have more Ah than the 780?
No. The cited brochure lists 100Ah for both, with 180 minutes reserve capacity for both.
Is the Marine Pro 1000 heavier?
The cited figures are 25.0kg for the 1000 and 25.1kg for the 780. Check the actual supplied version; we have not weighed them.
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.
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.