|
This is an interesting project. But there are a couple things you may need to consider.
First of all, 250 Watts won't be enough to completely replace the alternator. But you probably know that. You might need 4-5 times that much Wattage, depending on your car's power requirements.
Also, while reducing the load on the alternator sounds good in theory, there is a downside. The alternator has a "sweet spot" where it's most efficient. If it goes out of that zone, its efficiency drops. So ironically, giving the alternator a helping hand might actually waste power. Personally, I wouldn't bother unless the alternator is being overloaded.
The exact numbers may differ from one unit to the next. But I read a scientific paper where the alternator they tested was most efficient at 30-40% of its max load, spinning at 2000-2500 RPM (that's alternator RPM, not engine RPM).
Instead of "helping" the alternator, maybe you could turn it off when it isn't needed. Sort of like pulse and glide. I think some modern cars do that already.
__________________
|