Summary: Spec sheet headline for the Fulbat FDM12-550-M24: 79Ah 12V 550A, made with boats and motorhomes in mind. Every figure that decides the fit is in the table below.
Is the Fulbat FDM12-550-M24 right for you?
Hours of quiet power away from a hook-up come from batteries like the Fulbat FDM12-550-M24, rated 79Ah 12V 550A. Holding 79Ah, it keeps a fridge and lights going through a quiet night at anchor. Batteries online for boats and motorhomes are simplest to choose by the code on the old one.
79Ah sits in the comfortable middle for boats and motorhomes.
12VVolts
79AhAmp-hours at C20
550ACold cranking current (EN)
Five checks for a perfect fit
- ✓ Check that the alternator or controller suits lead-carbon.
- ✓ Tape measure time: 260 × 168 × 233 mm is the footprint and height of this case. Leave a little clearance for the clamp and the cable lugs.
- ✓ Plus pole position: positive on the left-hand side. Mixing up orientation is the most common reason a battery of the right size will not connect.
Fulbat FDM12-550-M24 data sheet
MakeFulbat
ReferenceFDM12-550-M24
SeriesFULBAT FDM Marine AGM Carbon
Used forboats and motorhomes
Volts12V
Amp-hours at C2079Ah
Cold cranking current (EN)550A
TechnologyLead-carbon
Dimensions (L × W × H)260 × 168 × 233 mm
Battery weight23 kg
Terminal polaritypositive on the left-hand side
ConnectorsDUAL
Frequently asked questions
How strong is this battery when starting?
550A under the EN test. Diesel engines usually need more cranking power than petrol engines of the same size.
Does this battery match my current one physically?
Check two things together: size (260 × 168 × 233 mm) and orientation (positive on the left-hand side). Both must match.
Any tips for keeping a spare battery?
Store it fully charged, away from heat and frost, and give it a refresh charge before installation.
lead-carbon: how it works
Carbon in the negative plate changes how a lead battery ages. A yacht that motors for twenty minutes out of harbour puts more back into lead-carbon than into ordinary lead. Replace the bank together.
More options
Everything on baterias.online is filed by brand and reference, so ordering the Fulbat FDM12-550-M24 is straightforward. If the terminal side or size differ, browse the alternatives before ordering.
Installation and maintenance tips
A caravan that spends the winter parked on the drive often comes back in spring with a flat battery. Check the charge splitter or relay after fitting new batteries. Leaving a caravan battery flat all winter often ruins it.
