parallax power supply 7345ru parts PWM

Sal wrote:
Paralleling the 7345 with another charger in order to increase current won't work.

I thought so too, thinking about the equations for multiple load impedances in parallel. Of course the equations work for purely passive impedances.

A power supply (converter, charger, etc.) is an active circuit that does not present a fixed internal impedance value to the outside world independent of the voltage on it or independent of the current flowing through it.

BFL13, down through the years of hanging around these forums, convinced me to try multiple chargers ("power supplies") hooked in parallel with each other.

This past June when drycamping I did just that. My converter by itself was dumping 10 amps into my AGM battery bank according to the permanent ammeter in the negative cable of the batteries. By paralleling a cheap 2/10/50 charger with the converter, total amps into the batteries jumped to 13-14 amps according to the permanent ammeter. The ammeter built into the cheap charger showed a flow out of it of 3-4 amps.

So .... I conclude from this that the converter was supplying about 10 amps and the cheap charger was supplying the rest.

I looks like BF13 hit upon something I had overlooked regarding how active "loads" such as power supplies can perform when joined together in parallel with another active load -> the active load that the electro-chemical process inside an RV battery creates as it charges (or discharges)!