>. . . Rolls recommends a 3-phase charge cycle (Bulk, Absorption & Float) and a charge rate equal to 10% of the C20 (20 hr AH rating) of the battery bank. . .
. . . The battery should be charged from an outside source at 2.6 to 2.7 - volts per cell and a low current rate (approximately 5 Amps for small batteries and 10-Amps for larger ones) . . .
<a href="http://support.rollsbattery.com/support/solutions/articles/5964-battery-sulfation" target="_blank">Rolls Batteries' View</a>
So for my 2 x 120Ah, that's a large battery (220Ah), should have a minimum or 22A charge ?? and an equalising current of maybe 10A ???????