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Determining The Ampere Hour Draw Of Your Boat In order to determine the ampere hour draw of your vessel, you need to know what electrical equipment you have and what the 12-volt amp draw is. The following is a listing of typical 12-volt equipment aboard most boats and the average amp draw per hour. Additionally, the above amp draw is for “on time” while the batteries are being used. Remember, a refrigerator, fresh water pump, macerator, etc. only draw power intermittently. *Inverters vary on 12-volt amp draw depending on 115 volts A/C draw. Please consult your inverter manufacturer for additional information. 12-VOLT ITEM AMP DRAW Bilge Pump (500 gph) 2.0 Bilge Pump (1000 gph) 2.9 Bilge Pump (1500 gph) 4.9 Bilge Pump (2000 gph) 8.4 Navigation Lights (3 mile) 1.5 Live Well Pump 7.0 Fresh Water Pump 4.0 Refrigerator (12 volt) 6.0 Ice Maker 6.0 Macerator 9.0 Anchor Windlass (900 lb) 75 12 Volt House Lighting 0.15 per 10 watts Spot Lights (100K cp) 8.0 Spreader Lights (3K cp) 3.0 RADAR (24 mile) 5.0 GPS 0.8 LORAN 0.7 VHF Radio - transmit 6.0 VHF Radio - receive 0.5 Fish Finder (LCD) 1.0 Depth Finder (Color) 3.0 SSB - transmit 30 INVERTERS* SSB - receive 2.5 Autopilot 5.0 Stereo (50 watt) 0.5 Fan 1.0 TROLLING MOTORS (12 volt) 24 lb thrust 27 30 lb thrust 30 36 lb thrust 36 42 lb thrust 40 55 lb thrust 55
It’s Time To Replace Your Battery When... • You had to jump start your battery • The battery can barely turn the starter over • Lighting and electronics dim or go out when starting • The battery will not hold a charge • The battery becomes submerged • The battery discharges frequently between use
Deep Cycle Batteries Deep cycle batteries incorporate thicker grids, denser active material on the plates and alloys specifically designed to provide many cycles. These batteries are designed to provide continuous operating time to run trolling motors, live wells, inverters, 12-volt lighting, depth finders, etc. They can be charged and recharged many times without damaging the internal components of the battery. These batteries have a lower MCA rating and higher reserve capacity/amp hour rating than dual purpose or starting types
Understanding Battery Ratings rates batteries using standard BCI (Battery Council International) industry ratings. These ratings are designed to help you select the proper battery for your application. In order to determine which battery is right for a specific application, you should understand the following ratings. Ampere Hour Rating (Reference Rating) This is the number of amps which a battery can deliver for a 20-hour period. This test is also referred to as the 20-hour rate. The larger the ampere hour rating, the more power the battery can deliver over time. Marine Cranking Amps (MCA) This is the number of amps a battery can deliver at 32 degrees fahrenheit for 30 seconds, and maintain at least a voltage of 1.2 volts per cell. This differs from cold cranking amps which are measured at 0 degrees fahrenheit. Reserve Capacity (RC) This is the time, in minutes, for which a battery will deliver 25 amperes at 80 degrees fahrenheit. This represents the time which the battery will continue to operate essential accessories in the event of alternator or generator failure or while the key is off.
Calculate the AMP Hour Capacity Battery you Need In order to determine the proper amp hour rating capacity you need for your boat, simply add up the 12-volt accessories you have, multiply by 20; that should give you a very good approximation of your boat’s amp hour battery requirement. Then cross reference this to the charts below. The first chart provides amp load versus minutes, the second chart provides the 20-hour rate. It is usually advised to buy a battery at least 20% over this requirement, as 12-volt capacity varies with usage and as batteries age.
SPECIFICATIONS Nominal Voltage (V) 12VCapacity at C/100 265AhCapacity at C/20 225AhCapacity at C/5 188AhWeight 166 lbs. (75 kg)Plate Alloy Lead CalciumPosts Forged Terminals & Bushings Container/Cover Polypropylene Operating Temperature Range -76°F (-60°C) - 140°F (60°C) Charge Voltage @ 77°F (25°C) Charge / Absorption / Equalize 2.30 - 2.43 VPC Float / Standby 2.23 - 2.26 VPC Vent Self-sealing Electrolyte Sulfuric acid thixotropic gel
DIMENSIONS Inches (mm)Length 20.75 (527 mm) Width 8.50 (216 mm) Height 10.00 (254 mm)
Nominal Voltage (V) 12V Capacity at C/100 210 Ah Capacity at C/20 183 Ah Capacity at C/5 153 Ah Weight 137 lbs. (62 kg)Plate Alloy Lead Calcium Posts Forged Terminals & Bushings Container/Cover Polypropylene Operating Temperature Range -76°F (-60°C) - 140°F (60°C) Charge Voltage @ 77°F (25°C) Charge / Absorption / Equalize 2.30 - 2.43 VPC Float / Standby 2.23 - 2.26 VPC Vent Self-sealing Electrolyte Sulfuric acid thixotropic gel Terminal S (SAE)
DIMENSIONS Inches (mm)Length 20.75 (527 mm) Width 8.43 (214 mm) Height 10.00 (254 mm) including terminal
The Deka Intimidator's tight-pack plate and separator absorbed glass mat construction provides added power for resistance against hard-hitting stereo systems, competitive racing or off-road wear and tear vibration. Along with a more efficient design, the Deka Intimidator has the same case/cover configuration used by original equipment manufacturers for an easier fit into more applications. No elaborate marketing gimmicks or hold-down retrofits, just decades of experience to provide a better fit, more power and long
Features100% Maintenance FreeProprietary Plate Formation ProcessExclusive Ultra Premium Sealing ValveComputer Cast Power Path GridsExclusive Weld SealsDual Purpose Design Yields Deep Cycle Service and High Rate PerformanceBenefitsMaintenance free sealed construction eliminates the need to add water.Less than 2% per month stand loss means little deteoriation during transport and storageNon-spillable batteries transport easily and safely by air.Quality construction ensures reliable service and supportTECHNICAL SPECIFICATIONSBattery Technology:AGM BatteryVoltage:6VoltsC/20 capacity:190AhTerminal Type:G (T881)
Rated non-spillable by ICAO, IATA, and DOT
Approved by CEC
Made in the USA by East Penn Manufacturing
Weight: 68 lbs. (31 kg)
Dimensions LxWxH: 10.26" x 7.09" x 11.06" (260 x 181 x 276 mm)
Delco Deep Cycle Battery This Mainenance Free Delco Marine Voyager M27MF is 12 Volt marine deep cycle battery. It produces 270 amps of power and has a reserve capacity of 160 ampere hours. At 32º the M27MF is able to produce 750 cranking amps of power.
This Maintenance Free Delco Marine Voyager M24MF is 12 Volt marine deep cycle battery. It produces 200 amps of power and has a reserve capacity of 140 ampere hours. At 32º the M24MF is able to produce 680 cranking amps of power.ACDelco Voyager Battery Keep your warm-weather recreation going. The ACDelco Voyager Battery is built to last in your boat, personal watercraft,