PD or Iota for my upgrade?

WoodIsGood wrote:

DryCamper11 wrote:
For WoodIsGood: he wanted to change the current limit during initial charging, with a switch. One way would be to add some resistance to the current sensor. . . . . Or, one could adjust the current limit circuit instead of the current sensor.

Just want to make sure I'm understanding the mods you made to your converter correctly. Based on this post - http://forums.trailerlife.com/Index.cfm/fuseaction/thread/tid/26139699/gotomsg/26355953.cfm#26355953 - and this post - http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/26139699/gotomsg/26357317.cfm#26357317 I believe in "Mod 3" you reduced the current limit from 80A to 60A by roughly halving the resistance shown at R15 in the '002 patent figure 2A. Did I understand that all correctly?

Yes, you understand that correctly, although the effect was to keep the current limit at 80A, since the sensitivity of the current monitor was decreased so that at 80A the current monitor circuit was producing the same voltage that previously had been produced at 60A. By decreasing the current limit the limit remained unchanged. The reason I did that was my belief that the current sensing was affecting the duty cycle/average voltage at higher current levels and higher voltage outputs - producing an early tapering in current output. I'm not sure that was what was happening. I was simultaneously changing power sources (generator vs. shore power and voltages - both were adjustable). More testing was needed, but I ran out of time to do the testing needed and I was pretty happy with the results after my last long RV trip.

My goal is to be able to recharge my 2 T-105 batteries with my Honda 1000 generator when boondocking. I'm well aware I can't drive the converter at 80 amps with this generator; 40-45 amps is more likely doable. I want to modify the PD9280 so I can switch it between 2 modes. In one it will be throttled back and act more like a PD9245 so I can power it with the Honda. In the other it will retain its original capabilities and I can use my onboard Onan 4.4K generator to power it and do a faster recharge.

I see no reason you can't do that using one of the two techniques in my posts - changing monitored current or the current limit. I'd probably try the current limit change first with a resistor you switch in/out of the current limit circuit. Please tell us how it goes.