Magnasine 4024 flickering

Anyone experience this inverter flickering? By that I mean the voltage seems to vary every ten seconds ish, and it is showing in the lights and t.v.
900 watts pv (building on) on poles, off grid 60a mppt, magnum 2k 12v msw, 1400 ah forklift battery (rewired to 12v), 8k diesel gen for house. honda eu6500, 2x 8D, coleman 800w inv for shop, honda 5k for well (pumps to 1000g cistern), ryobi 2k suitcase for mobile ops.
Comments
On the AC side, a poor neutral connection/loose or corroded bus bar connections can cause lights to both flicker dark when there are heavy loads, or even flicker bright (if this is a 120/240 VAC Split phase system--faulty neutral connections back to the inverter/main power source can cause all lights/appliances in a home to flicker--Vs just one breaker connection causing problems for one circuit).
-Bill
Erik