5kW Northern Lights on the boat, 8kW Onan/Kubota for dirt house hurricane gennie. No gauges on either. Just the automatic oil/temp shutdowns, which I test periodically.
These gennies run long term and I do not stand around watching gauges. Last hurricane the dirt house gennie was on for three weeks. If it had gauges, how often would I monitor them? Zero.
Just make sure the safety shutdowns work.