04-25-2022, 01:02 PM
First comment, you are WAY underpowered with a 80lb Terrova on a 21ft. boat. You can never have enough power when you are using an electric motor. That said, Lithium is by far the wave of the future in electric motor tecnology. Right now, the biggest problem is cost. Name brand batteries are upwards of 800 plus for a 100 amphr, 12volt. Relion makes the BassPro/Cabela's batteries. There are a great number of cheaper ones out there, many with the Bluetooth BMS systems. From what I have been able to read, you need a 1BMS system that is rated for 100amphrs or more on the batteries. Charging is also a new problem. I have an older Minn Kota 2 bank charger. Minn Kota tells me it is suitable for charging Lithium batteries as it charges 10amp per bank. I have been using AGMs for the past 5 years and have had great success. My only problem has been powering electronics. All the new electronics are power hogs and my units drain my starting battery now. As stated, Lithium is not suitable for a starting battery. I am staying with a LA starting battery and adding a Lithium ( most likely a 50 Amphr ) for the electronics. As for the trollers, I am staying with AGM for now, unless the price of Lithium comes WAY down in the next couple of years. At 72, I don't know how many more years I have in me, the batteries will probably out last me !!!
Seriously, look into upgrading your troller. On a boat that size, you should be running a 110 lb thrust , 36 volt system!
Seriously, look into upgrading your troller. On a boat that size, you should be running a 110 lb thrust , 36 volt system!