I have been unsuccessful in tracking down much information on Company E of the 3rd (Palmetto) Battalion South Carolina Light Artillery. According to Muster Rolls in the S.C. Archives:
" The battalion was formed about November, 1861 with companies A to C. Seven other companies were added at various times, the latest in June of 1863. Companies H, I, and K were not legally founded at were disbanded by Special Order No. 77, A. & I. G. O. dated April 1, 1864. It was known in the field as the Palmetto Battallion Light Artillerry but was officially designated the 3rd Battalion South Carolina Light Artillery. It was also known as White's Battalion South Carolina Light Artillery."
The White referenced here is Colonel E.B. White.
According to the "Record of Events" that accompanies the muster roll, Company E was stationed at Simons Landing from March 20 - April 30, 1862; Camp Lee - West Lines on James Island, S.C. during May and June , 1862; James Island - July - October, 1862; no record for Nov. & Dec.; Holmes Farm, James Island Jan. - April, 1863; McLeaods, James Island May-August 1863; Redoubt No. 2 -New Lines, James Island, September-December 1863 and Jan. - Feb, 1864; Battery Glover James Island, S.C. - March - April 1864; Battery Haskell James Island, May - Oct, 1864 and Successionville James Island - Nov.-Dec., 1864.
A notation indicates that
"This company was engaged at Battery Wagner Morris Island So. Ca. from Aug. 31 to Sept. 7, 1863 and is this date at Redoubt No. 2 New Lines James Island."
Additionally, there is a notation in the muster rolls for my ggrandfather that at some point late in the war that he was " on detail at Columbia Arsenal to report to his company." That seems to indicate that Company E went to the Columbia Arsenal after leaving Charleston, but could also indicate assignment to another company after Company E. disbanded.