Dont let a 24v system stop you from getting the power of lithium!  To keep a 24v system (2x identical MEGALiFe batteries in series) in top shape, a battery balancer can help,  This is an 'active' style balancer that will pass current (up to 5A) from a battery with a higher voltage to that of a lower voltage when the batteries are connected in series connections (nominal 24v).  There is a bluetooth and non-bluetooth versions (android app available only).  Simple installation and stress free connection for your truck or heavy equipment needs.