Im using this library https://www.npmjs.com/package/@googlemaps/markerclusterer for large amounts of markers using this code:
// create map
var map = new google.maps.Map($el[0], args);
// add a markers reference
map.markers = [];
markers = map.markers;
var markerCluster = new markerClusterer.MarkerClusterer({map, markers});
And its working fine. But i need to change style for the Marker Clusterer or better use an svg. Cant find any example online.
Solved like this: