KU63 controller only outputting 5A max

alban

Pedelecer
May 25, 2011
110
0
2x10AH batts in parallel in Tonaro mid drive.
Wattmeter shows max 5A only pull when going slowly uphill v nr stall speed in highish gear. Can't seem to pull more out under any circs.
Power level wires perm joined at max at connector.
Other controller with tinned shunt is pulling 9-10A not under duress so batts are ok. Don't want to tin shunt on this one but surely it should be capable of 10A?
Any ideas?
Thanks.