B27
Well-known member
There are plenty of V/I curves published for lead acid batteries as a function of state of charge.Yes in any mode. Acceptance rate is a hard limit on the battery. you can’t just ram more juice in to a battery. Chemistry doesn’t work like that. For normal installs you won’t usually notice but as solar banks get larger it’s a huge issue for small lead banks.
The OP is only talking about ~70A into 630Ah of batteries, that's not much more than 0.1C or a 'ten hour rate'. At that current the the batteries would have to be over 90% charge for the voltage limit to kick in.
Acceptance of a battery is largely a myth, you can shove in what current you like, it just takes more volts. And the charge that goes in may be stored with less or more efficiency.