Collection: Marine-Grade Alternators – Power Your Next Adventure
Keep the good times rolling (and your battery charged!) with our collection of rugged, marine-grade alternators. Built to tackle the open sea, these alternators are ready for whatever Mother Nature throws your way—salt, spray, or sun! From powering your lights to keeping your comms running strong, they’re designed for smooth sailing and peace of mind. Dive into our selection and find the right alternator to keep your boat humming happily, so you can focus on the real adventure ahead!
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83 products
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Balmar Alternator 120 Amp 12V 1-2" Single Foot Single K6 Pulley w/Isolated Grounding [621-120-K6]Balmar Alternator 120 Amp 12V 1-2" Single Foot Single K6 Pulley w/Isolated Grounding [621-120-K6]
- Regular price
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$766.00 - Regular price
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$857.00 - Sale price
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$766.00
Sale -
Balmar Alternator 100 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley w/Isolated Ground [621-100-DV]Balmar Alternator 100 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley w/Isolated Ground [621-100-DV]
- Regular price
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$688.00 - Regular price
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$770.00 - Sale price
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$688.00
Sale -
Balmar Alternator 100 AMP Kit 12V 3.15" Dual Foot Saddle Single Vee Pulley Regulator Temp Sensor [60-YP-MC-100-SV]Balmar Alternator 100 AMP Kit 12V 3.15" Dual Foot Saddle Single Vee Pulley Regulator Temp Sensor [60-YP-MC-100-SV]
- Regular price
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$925.00 - Regular price
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$1,035.00 - Sale price
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$925.00
Sale -
Balmar Kit 621 Series 100A Single FT Alt MC Reg T Sensor [621-VUP-MC-100-SV]Balmar Kit 621 Series 100A Single FT Alt MC Reg T Sensor [621-VUP-MC-100-SV]
- Regular price
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$925.00 - Regular price
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$1,035.00 - Sale price
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$925.00
Sale -
Balmar Alternator 250 AMP 12V 3.15" Dual Foot Saddle J10 Pulley [XT-DF-250-J10]Balmar Alternator 250 AMP 12V 3.15" Dual Foot Saddle J10 Pulley [XT-DF-250-J10]
- Regular price
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$1,207.00 - Regular price
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$1,350.00 - Sale price
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$1,207.00
Sale -
Balmar Alternator Protection Module - 48V [APM-48]Balmar Alternator Protection Module - 48V [APM-48]
- Regular price
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$134.00 - Regular price
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$149.00 - Sale price
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$134.00
Sale -
ARCO Marine Premium Replacement Alternator w/Single Groove Pulley - 12V, 55A [60050]ARCO Marine Premium Replacement Alternator w/Single Groove Pulley - 12V, 55A [60050]
- Regular price
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$198.99 - Regular price
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$248.24 - Sale price
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$198.99
Sale -
Balmar Alternator 250 AMP Kit 12V 4" Dual Foot Saddle Dual Vee Pulley Regulator Temp Sensor [XT-DF4-250-DV-KIT ]Balmar Alternator 250 AMP Kit 12V 4" Dual Foot Saddle Dual Vee Pulley Regulator Temp Sensor [XT-DF4-250-DV-KIT ]
- Regular price
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$1,444.00 - Regular price
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$1,615.00 - Sale price
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$1,444.00
Sale -
Balmar Belt Buddy w/Universal Offset Adjustment Arm (UAA2) [UBB2]Balmar Belt Buddy w/Universal Offset Adjustment Arm (UAA2) [UBB2]
- Regular price
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$89.99 - Regular price
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$99.99 - Sale price
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$89.99
Sale -
Balmar Alternator 210 AMP 12V 4" Dual Foot Saddle Dual Vee Pulley w/Isolated Ground [9504-12-210-IG]Balmar Alternator 210 AMP 12V 4" Dual Foot Saddle Dual Vee Pulley w/Isolated Ground [9504-12-210-IG]
- Regular price
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$1,297.00 - Regular price
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$1,451.00 - Sale price
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$1,297.00
Sale -
Balmar Alternator 120 AMP 12V 4" Dual Foot Saddle K6 Pulley w/Isolated Ground [604-120-K6]Balmar Alternator 120 AMP 12V 4" Dual Foot Saddle K6 Pulley w/Isolated Ground [604-120-K6]
- Regular price
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$766.00 - Regular price
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$857.00 - Sale price
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$766.00
Sale -
Balmar Alternator 100 AMP Kit 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley Regulator Temp Sensor [621-VUP-MC-100-DV]Balmar Alternator 100 AMP Kit 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley Regulator Temp Sensor [621-VUP-MC-100-DV]
- Regular price
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$925.00 - Regular price
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$1,035.00 - Sale price
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$925.00
Sale -
Balmar Alternator 170 Amp, 12V Single Foot Internal Regulator K6 Pulley [XT-SF-170-IR]Balmar Alternator 170 Amp, 12V Single Foot Internal Regulator K6 Pulley [XT-SF-170-IR]
- Regular price
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$539.00 - Regular price
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$588.00 - Sale price
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$539.00
Sale -
Balmar 621 Series Alternator - Spindle Mount(Single Foot) - 100A - 12V [621-100-SV]Balmar 621 Series Alternator - Spindle Mount(Single Foot) - 100A - 12V [621-100-SV]
- Regular price
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$688.00 - Regular price
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$770.00 - Sale price
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$688.00
Sale -
ARCO Marine Premium Replacement Outboard Alternator w/Multi-Groove Pulley - 12V 50A [20850]ARCO Marine Premium Replacement Outboard Alternator w/Multi-Groove Pulley - 12V 50A [20850]
- Regular price
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$375.99 - Regular price
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$470.00 - Sale price
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$375.99
Sale -
Balmar Alternator 250 AMP 12V 3.15" Dual Foot Saddle K6 Pulley [XT-CR-250-K6]Balmar Alternator 250 AMP 12V 3.15" Dual Foot Saddle K6 Pulley [XT-CR-250-K6]
- Regular price
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$1,207.00 - Regular price
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$1,350.00 - Sale price
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$1,207.00
Sale -
Balmar Alternator 250 AMP Kit 12V 3.15" Dual Foot Saddle J10 Pulley Regulator Temp Sensor [XT-DF-250-J10-KIT]Balmar Alternator 250 AMP Kit 12V 3.15" Dual Foot Saddle J10 Pulley Regulator Temp Sensor [XT-DF-250-J10-KIT]
- Regular price
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$1,444.00 - Regular price
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$1,615.00 - Sale price
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$1,444.00
Sale -
Balmar Alternator 170 AMP Kit 12V 3.15" Dual Foot Saddle K6 Pulley Regulator Temp Sensor [XT-CR-170-K6-KIT]Balmar Alternator 170 AMP Kit 12V 3.15" Dual Foot Saddle K6 Pulley Regulator Temp Sensor [XT-CR-170-K6-KIT]
- Regular price
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$1,220.00 - Regular price
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$1,365.00 - Sale price
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$1,220.00
Sale -
Balmar Alternator 100 AMP 12V 3.15" Dual Foot Saddle K6 Pulley w/Isolated Ground [60-100-K6]Balmar Alternator 100 AMP 12V 3.15" Dual Foot Saddle K6 Pulley w/Isolated Ground [60-100-K6]
- Regular price
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$688.00 - Regular price
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$770.00 - Sale price
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$688.00
Sale -
Balmar Alternator 250 AMP Kit 12V 3.15" Dual Foot Saddle K6 Pulley Regulator Temp Sensor [XT-CR-250-K6-KIT]Balmar Alternator 250 AMP Kit 12V 3.15" Dual Foot Saddle K6 Pulley Regulator Temp Sensor [XT-CR-250-K6-KIT]
- Regular price
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$1,444.00 - Regular price
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$1,615.00 - Sale price
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$1,444.00
Sale -
Balmar Alternator 120 AMP 12V 3.15" Dual Foot Saddle Dual Pulley w/Isolated Ground [60-120-DV]Balmar Alternator 120 AMP 12V 3.15" Dual Foot Saddle Dual Pulley w/Isolated Ground [60-120-DV]
- Regular price
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$766.00 - Regular price
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$857.00 - Sale price
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$766.00
Sale -
Balmar Alternator 250 AMP 12V 3.15" Dual Foot Saddle Dual Vee Pulley [XT-DF-250-DV]Balmar Alternator 250 AMP 12V 3.15" Dual Foot Saddle Dual Vee Pulley [XT-DF-250-DV]
- Regular price
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$1,207.00 - Regular price
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$1,350.00 - Sale price
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$1,207.00
Sale -
Balmar Alternator 170 AMP Kit 12V 3.15" Dual Foot Saddle J10 Pulley Regulator Temp Sensor [XT-CR-170-J10-KIT]Balmar Alternator 170 AMP Kit 12V 3.15" Dual Foot Saddle J10 Pulley Regulator Temp Sensor [XT-CR-170-J10-KIT]
- Regular price
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$1,220.00 - Regular price
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$1,365.00 - Sale price
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$1,220.00
Sale -
Balmar Offshore Repair Kit AT Series 200AMP 12V Includes Bearings, Brushes, Rectifier [70-AT-200]Balmar Offshore Repair Kit AT Series 200AMP 12V Includes Bearings, Brushes, Rectifier [70-AT-200]
- Regular price
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$202.00 - Regular price
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$226.00 - Sale price
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$202.00
Sale -
Balmar Alternator 170 AMP 12V 3.15" Dual Foot Saddle J10 Pulley [XT-CR-170-J10]Balmar Alternator 170 AMP 12V 3.15" Dual Foot Saddle J10 Pulley [XT-CR-170-J10]
- Regular price
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$984.00 - Regular price
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$1,100.00 - Sale price
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$984.00
Sale -
Balmar Alternator 120 AMP Kit 12V 3.15" Dual Foot Saddle Dual Vee Pulley Regulator Temp Sensor [60-YP-MC-120-DV]Balmar Alternator 120 AMP Kit 12V 3.15" Dual Foot Saddle Dual Vee Pulley Regulator Temp Sensor [60-YP-MC-120-DV]
- Regular price
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$1,003.00 - Regular price
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$1,122.00 - Sale price
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$1,003.00
Sale -
Balmar Alternator 170 AMP 12V 3.15" Dual Foot Saddle K6 Pulley [XT-CR-170-K6]Balmar Alternator 170 AMP 12V 3.15" Dual Foot Saddle K6 Pulley [XT-CR-170-K6]
- Regular price
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$984.00 - Regular price
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$1,100.00 - Sale price
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$984.00
Sale -
Balmar Alternator 100 AMP Kit 12V 1-2" Single Foot Spindle Mount K6 Pulley Regulator Temp Sensor [621-VUP-MC-100-K6]Balmar Alternator 100 AMP Kit 12V 1-2" Single Foot Spindle Mount K6 Pulley Regulator Temp Sensor [621-VUP-MC-100-K6]
- Regular price
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$925.00 - Regular price
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$1,035.00 - Sale price
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$925.00
Sale -
Balmar Alternator 250 AMP 12V 3.15" Dual Foot Saddle K6 Pulley [XT-DF-250-K6]Balmar Alternator 250 AMP 12V 3.15" Dual Foot Saddle K6 Pulley [XT-DF-250-K6]
- Regular price
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$1,207.00 - Regular price
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$1,350.00 - Sale price
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$1,207.00
Sale -
Balmar Alternator 170 AMP Kit 12V 4" Dual Foot Saddle K6 Pulley Regulator Temp Sensor [XT-DF4-170-K6-KIT]Balmar Alternator 170 AMP Kit 12V 4" Dual Foot Saddle K6 Pulley Regulator Temp Sensor [XT-DF4-170-K6-KIT]
- Regular price
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$1,220.00 - Regular price
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$1,365.00 - Sale price
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$1,220.00
Sale -
Balmar Alternator 100 AMP Kit 12V 1-2" Single Foot Spindle Mount J10 Pulley Regulator Temp Sensor [621-VUP-MC-100-J10]Balmar Alternator 100 AMP Kit 12V 1-2" Single Foot Spindle Mount J10 Pulley Regulator Temp Sensor [621-VUP-MC-100-J10]
- Regular price
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$925.00 - Regular price
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$1,035.00 - Sale price
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$925.00
Sale -
Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount J10 Pulley w/Isolated Ground [621-120-J10]Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount J10 Pulley w/Isolated Ground [621-120-J10]
- Regular price
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$766.00 - Regular price
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$857.00 - Sale price
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$766.00
Sale -
Balmar Alternator 100 AMP 12V 1-2" Single Foot Spindle Mount J10 Pulley w/Isolated Ground [621-100-J10]Balmar Alternator 100 AMP 12V 1-2" Single Foot Spindle Mount J10 Pulley w/Isolated Ground [621-100-J10]
- Regular price
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$688.00 - Regular price
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$770.00 - Sale price
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$688.00
Sale -
Balmar Alternator 250 AMP Kit 12V 3.15" Dual Foot Saddle Dual Vee Pulley Regulator Temp Sensor [XT-DF-250-DV-KIT]Balmar Alternator 250 AMP Kit 12V 3.15" Dual Foot Saddle Dual Vee Pulley Regulator Temp Sensor [XT-DF-250-DV-KIT]
- Regular price
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$1,444.00 - Regular price
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$1,615.00 - Sale price
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$1,444.00
Sale -
Balmar Alternator 170 AMP Kit 12V 4" Dual Foot Saddle K6 Pulley [XT-DF4-170-K6]Balmar Alternator 170 AMP Kit 12V 4" Dual Foot Saddle K6 Pulley [XT-DF4-170-K6]
- Regular price
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$984.00 - Regular price
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$1,100.00 - Sale price
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$984.00
Sale -
Balmar Alternator 100 AMP 12V 3.15" Dual Foot Saddle Pulley w/Isolated Ground [60-100-DV]Balmar Alternator 100 AMP 12V 3.15" Dual Foot Saddle Pulley w/Isolated Ground [60-100-DV]
- Regular price
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$688.00 - Regular price
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$770.00 - Sale price
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$688.00
Sale -
Balmar Alternator 100 AMP Kit 12V 3.15" Dual Foot Saddle Dual Pulley Regulator Temp Sensor [60-YP-MC-100-DV]Balmar Alternator 100 AMP Kit 12V 3.15" Dual Foot Saddle Dual Pulley Regulator Temp Sensor [60-YP-MC-100-DV]
- Regular price
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$925.00 - Regular price
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$1,035.00 - Sale price
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$925.00
Sale -
ARCO Marine Premium Replacement Alternator w/Multi-Groove Pulley - 12V 55A [60055]ARCO Marine Premium Replacement Alternator w/Multi-Groove Pulley - 12V 55A [60055]
- Regular price
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$212.99 - Regular price
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$264.40 - Sale price
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$212.99
Sale -
ARCO Marine Premium Replacement Inboard Alternator w/55mm Multi-Groove Pulley - 12V 65A [60073]ARCO Marine Premium Replacement Inboard Alternator w/55mm Multi-Groove Pulley - 12V 65A [60073]
- Regular price
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$233.99 - Regular price
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$291.35 - Sale price
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$233.99
Sale -
Balmar Alternator 100 AMP Kit 12V 3.15" Dual Foot Saddle K6 Pulley Regulator Temp Sensor [60-YP-MC-100-K6]Balmar Alternator 100 AMP Kit 12V 3.15" Dual Foot Saddle K6 Pulley Regulator Temp Sensor [60-YP-MC-100-K6]
- Regular price
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$925.00 - Regular price
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$1,035.00 - Sale price
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$925.00
Sale -
Balmar Alternator 100 AMP 12V 1-2" Single Foot Spindle Mount K6 Pulley w/Isolated Ground [621-100-K6]Balmar Alternator 100 AMP 12V 1-2" Single Foot Spindle Mount K6 Pulley w/Isolated Ground [621-100-K6]
- Regular price
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$688.00 - Regular price
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$770.00 - Sale price
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$688.00
Sale -
ARCO Marine Premium Replacement Alternator w/50mm Multi-Groove Pulley [20815]ARCO Marine Premium Replacement Alternator w/50mm Multi-Groove Pulley [20815]
- Regular price
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$239.99 - Regular price
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$307.45 - Sale price
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$239.99
Sale -
ARCO Marine Premium Replacement Inboard Alternator w/Single Groove Pulley - 12V 55A [60125]ARCO Marine Premium Replacement Inboard Alternator w/Single Groove Pulley - 12V 55A [60125]
- Regular price
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$225.99 - Regular price
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$280.80 - Sale price
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$225.99
Sale -
Balmar Offshore Repair Kit 90 Series 12/24V Includes Bearings, Brushes, Positive/Negative Diode [7090]Balmar Offshore Repair Kit 90 Series 12/24V Includes Bearings, Brushes, Positive/Negative Diode [7090]
- Regular price
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$126.00 - Regular price
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$140.00 - Sale price
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$126.00
Sale -
Balmar Alternator 150 AMP 12V 4" Dual Foot Saddle K6 Pulley w/Isolated Ground [604-150-K6]Balmar Alternator 150 AMP 12V 4" Dual Foot Saddle K6 Pulley w/Isolated Ground [604-150-K6]
- Regular price
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$904.00 - Regular price
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$1,011.00 - Sale price
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$904.00
Sale -
ARCO Marine Premium Replacement Alternator w/65mm Multi-Groove Pulley - 12V 70A [20800]ARCO Marine Premium Replacement Alternator w/65mm Multi-Groove Pulley - 12V 70A [20800]
- Regular price
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$192.99 - Regular price
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$243.50 - Sale price
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$192.99
Sale -
ARCO Marine Premium Replacement Alternator w/Single Groove Pulley - 12V 70A [20102]ARCO Marine Premium Replacement Alternator w/Single Groove Pulley - 12V 70A [20102]
- Regular price
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$191.99 - Regular price
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$221.35 - Sale price
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$191.99
Sale -
Balmar Alternator 100 AMP 12V 3.15" Dual Foot Saddle J10 Pulley w/Isolated Ground [60-100-J10]Balmar Alternator 100 AMP 12V 3.15" Dual Foot Saddle J10 Pulley w/Isolated Ground [60-100-J10]
- Regular price
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$688.00 - Regular price
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$770.00 - Sale price
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$688.00
Sale -
Balmar Offshore Repair Kit 95 Series 12/24V Includes Bearings, Brushes, Positive/Negative Diode [7095]Balmar Offshore Repair Kit 95 Series 12/24V Includes Bearings, Brushes, Positive/Negative Diode [7095]
- Regular price
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$227.00 - Regular price
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$254.00 - Sale price
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$227.00
Sale -
ARCO Marine Premium Replacement Universal Alternator w/Single Groove Pulley - 12V 55A [60075]ARCO Marine Premium Replacement Universal Alternator w/Single Groove Pulley - 12V 55A [60075]
- Regular price
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$216.99 - Regular price
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$269.50 - Sale price
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$216.99
Sale -
Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley w/Isolated Ground [621-120-DV]Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley w/Isolated Ground [621-120-DV]
- Regular price
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$766.00 - Regular price
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$857.00 - Sale price
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$766.00
Sale -
Balmar Alternator 150 AMP 12V 4" Dual Foot Saddle Dual Pulley w/Isolated Ground [604-150-DV]Balmar Alternator 150 AMP 12V 4" Dual Foot Saddle Dual Pulley w/Isolated Ground [604-150-DV]
- Regular price
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$904.00 - Regular price
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$1,011.00 - Sale price
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$904.00
Sale -
Balmar Alternator Protection Module APM24 - 24V [APM-24]Balmar Alternator Protection Module APM24 - 24V [APM-24]
- Regular price
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$89.99 - Regular price
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$99.99 - Sale price
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$89.99
Sale -
Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley Regulator Temp Sensor [621-VUP-MC-120-DV]Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley Regulator Temp Sensor [621-VUP-MC-120-DV]
- Regular price
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$1,003.00 - Regular price
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$1,122.00 - Sale price
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$1,003.00
Sale -
Balmar Max Charge MC618 Multi-Stage Regulator w/o Harness - 12V [MC-618]Balmar Max Charge MC618 Multi-Stage Regulator w/o Harness - 12V [MC-618]
- Regular price
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$309.00 - Regular price
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$346.00 - Sale price
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$309.00
Sale -
Balmar 621 Series 120A Kit w/MC-618 Regulator, T-Sensor, K6 Pulley, Single Foot Mounting Hardware [621-VUP-MC-120-K6]Balmar 621 Series 120A Kit w/MC-618 Regulator, T-Sensor, K6 Pulley, Single Foot Mounting Hardware [621-VUP-MC-120-K6]
- Regular price
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$1,003.00 - Regular price
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$1,122.00 - Sale price
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$1,003.00
Sale -
Balmar Temp Sensor Battery - 30 [MC-TS-B30]Balmar Temp Sensor Battery - 30 [MC-TS-B30]
- Regular price
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$53.99 - Regular price
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$59.99 - Sale price
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$53.99
Sale -
Balmar Alternator 100 AMP Kit 12V 3.15" Dual Foot Saddle J10 Pulley Regulator Temp Sensor [60-YP-MC-100-J10]Balmar Alternator 100 AMP Kit 12V 3.15" Dual Foot Saddle J10 Pulley Regulator Temp Sensor [60-YP-MC-100-J10]
- Regular price
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$925.00 - Regular price
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$1,035.00 - Sale price
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$925.00
Sale -
Mastervolt Alternator Temperature Sensor [41500400]Mastervolt Alternator Temperature Sensor [41500400]
- Regular price
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$16.64 - Regular price
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- Sale price
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$16.64
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Victron 2M Extension Cable f/IP65 Chargers [BPC900200014]Victron 2M Extension Cable f/IP65 Chargers [BPC900200014]
- Regular price
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$9.35 - Regular price
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$11.00 - Sale price
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$9.35
Sale