I have a Smartsolar 75/15 and have acquired some new (old stock) 9S 3Ah li-ion batteries by Bosch, so charge voltage about 37.8v, nominal 32.4/33.3v. I don't think manual settings cover these values so what do I need? Do I have to buy a different solar charger? Pv panels are 3 x 100Wp in series for about 56 - 60v out. This is for a small solar boat which previously had lead batteries. I've a feeling that I bought the wrong batteries.