RV-12is with the 912is Sport in the front. Just finished our Phase 1 hours and test cards, about 12 hours airframe & engine, single screen G3X, dual-axis autopilot and GTR 200. During our Phase 1 flights we would intermittently show "BATT AMPS" annunciation throughout all phases of flight and power settings showing anywhere from -1 to -4 under the Electrical info. Running lights and autopilot seemed to make no difference. Does anyone have any feedback on potential causes or solutions?