celestus
I read in another forums a sportbike rider was concerned about their excess power to add run heated gear and I got curious what power is typically available.
http://www.powerletproducts.com/learningCenter/excessCapacity
A short answer is ~100 watts but lets take a look at some steps to calculate that using my ST1300A as an example.
The first barrier was understanding amps watts and volts explained with this equation:
Watts = Volts x Amps
From my service manual ST1300A:
Service manual alternator output: 742 watts @ 5000 rpm (assuming 14 volts might be based on something else)
Main fuse off the battery: 65 amp (is the main fuse a concern?)
Assuming 14 volt 5000rpm: 742 watts / 14 volts = 53 amps (nope)
14 volts 5000 rpm: 742 watts
12 volts bike off: 636 watts
13 volt slow idle: 689 watts
Typical voltage on a bike seems to be around 13.5 so I ballpark 700 watts available in a realistic scenario.
Time to lookup a breakdown of electrical peripherals from my manual:
54 watts - Quick charge (11 watts slow charge)
25 watts - ABS computer
42 watts - Brake lights (there's 2 assume 21 per)
10 watts - Instrument Cluster
25 watts - ECU bike computer
100 watts - Radiator fans x2 assume 50 watt per fan
50 watts - Fuel Pump
10 watts - Position lights (small lights in headlight cluster)
90 watts - Headlights (two lights assume 45 each)
50 watts - Ignition (not sure what this is unique to EFI?)
42 watts - Turn signal front + back (84 watt 4-way flasher)
Total 498 watts
This figure is running with the brakes, turn signal, charging with fans running nothing more.
Total 413 watts
This figure is a slow charge with the fans and nothing else on. I can safely assume the bike will draw ~450 watts average idling around town on a hot day making several turns.
Possible accessories: ~250 watts available
Heated gear based off Gerbing's website:
77 watts - Jacket Liner
54 watts - Vest Liner
44 watts - Heated Pants
27 watts - Heated Gloves
Heated Seat based off Corbin Specs:
54 watts - Single panel rider/pillion
Heated Grips based on Symtec elements:
40.5 watts - 3A x13.5V based on specs
35 ? 100 watts - Aux lights each
40 ? 60 watts - Laptop
1 ? 3 watts - Cell Phone
1 ? 3 watts - Radar Detector
2 ? 6 watts - GPS
1 ? 3 watts - Portable Music
Hopefully this breakdown can answer if one can add heated gear, stereo, or additional lighting to their bikes. It seems all other electric accessories don't draw significant power.
http://www.powerletproducts.com/learningCenter/excessCapacity
A short answer is ~100 watts but lets take a look at some steps to calculate that using my ST1300A as an example.
The first barrier was understanding amps watts and volts explained with this equation:
Watts = Volts x Amps
From my service manual ST1300A:
Service manual alternator output: 742 watts @ 5000 rpm (assuming 14 volts might be based on something else)
Main fuse off the battery: 65 amp (is the main fuse a concern?)
Assuming 14 volt 5000rpm: 742 watts / 14 volts = 53 amps (nope)
14 volts 5000 rpm: 742 watts
12 volts bike off: 636 watts
13 volt slow idle: 689 watts
Typical voltage on a bike seems to be around 13.5 so I ballpark 700 watts available in a realistic scenario.
Time to lookup a breakdown of electrical peripherals from my manual:
54 watts - Quick charge (11 watts slow charge)
25 watts - ABS computer
42 watts - Brake lights (there's 2 assume 21 per)
10 watts - Instrument Cluster
25 watts - ECU bike computer
100 watts - Radiator fans x2 assume 50 watt per fan
50 watts - Fuel Pump
10 watts - Position lights (small lights in headlight cluster)
90 watts - Headlights (two lights assume 45 each)
50 watts - Ignition (not sure what this is unique to EFI?)
42 watts - Turn signal front + back (84 watt 4-way flasher)
Total 498 watts
This figure is running with the brakes, turn signal, charging with fans running nothing more.
Total 413 watts
This figure is a slow charge with the fans and nothing else on. I can safely assume the bike will draw ~450 watts average idling around town on a hot day making several turns.
Possible accessories: ~250 watts available
Heated gear based off Gerbing's website:
77 watts - Jacket Liner
54 watts - Vest Liner
44 watts - Heated Pants
27 watts - Heated Gloves
Heated Seat based off Corbin Specs:
54 watts - Single panel rider/pillion
Heated Grips based on Symtec elements:
40.5 watts - 3A x13.5V based on specs
35 ? 100 watts - Aux lights each
40 ? 60 watts - Laptop
1 ? 3 watts - Cell Phone
1 ? 3 watts - Radar Detector
2 ? 6 watts - GPS
1 ? 3 watts - Portable Music
Hopefully this breakdown can answer if one can add heated gear, stereo, or additional lighting to their bikes. It seems all other electric accessories don't draw significant power.