German sales abroad rose by 3.0 percent in the month to €84.3 billion ($118 billion), adjusted initial data from the statistics office Destatis showed.
At Goldman Sachs investment bank, Dirk Schumacher commented: "The data for external trade are volatile from month to month but the figures for September are in line (with the outlook) for strong continuing growth of exports."
At ING bank, economist Carsten Brzeski said that despite action to hold down state budgets in other countries in the eurozone and the slowdown in world demand, products "made in Germany"' continued to sell very well.
This trend was not likely to slowdown soon, he said. Compared with the data for September last year, German exports have surged by 22.5 percent.
Last year Germany was overtaken as the biggest exporter in the world by China. So far this year it has exported goods worth €703.2 billion. In September, imports fell by 1.5 percent in the month to €68.7 billion.
Consequently the balance of trade for the month showed an increased surplus, taking the surplus so far this year to €114.0 billion, or an increase of 16.5 percent from the equivalent figure last year.
Meanwhile, the balance of payments on current account, the broad measure of all current payments into and out of the country including payments for trade, services and financial transfers, showed an increased surplus of €85.7 billion so far this year from €75.7 billion at the same time last year.
The trade surplus in Germany, the biggest economy in Europe, is an underlying strong point for the eurozone, but is also a matter of concern in that, together with the payments surplus, it demonstrates divergence of economic performance among eurozone countries and notably with France.
The German surplus has been rising since the end of last year on the back of recovery throughout the world economy. This activity has pushed the German economy ahead. The government is expecting gross domestic product to grow by 3.4 percent this year.