tenbear wrote:
The only thing I would question in Kendall's post is using the PD9245 converter. If you have the Magnetek/Parallax converter and choose to replace it for convenience by a PD converter. The PD4645 might be a better choice since the 9245 is larger than the Parallax and the 4600 series is designed as a replacement for the Parallax and might be a better fit physically.
Agreed. The OEM converter space needs to be measured if he wants to go this route. I did use the phrase, "...if it fits" in my post. However, it's good that you stated the next best option if it doesn't. And if he's not very tech savvy, it still may be the best option.
I also like the IOTA idea. The only negative would be if the cabling is poor; in which case it will not remain at 14.8 long enough to accomplish much. Higher voltage works best in the absorption stage. Dropping out of "boost" too early will not do much to top the bank, but that's not the aim here. The aim is generally to get to 90% or so while camping and then top at home or on the way home.
With poor cabling, the difference to 90% between the IOTA and PD has shown to be pretty marginal. The hare starts out faster, but the tortoise often catches up as you near 90%.
IOTAs are really good for solar guys, though. You can get to, say, 80%... a little faster in the morning, shut down the genny and enjoy the peace tranquility of the sun finishing the job.
The 9260 is spec-ed at 1000 watts. There is going to be loss in the conversion.
As far as a 9280 goes, yes... with mediocre, OEM cabling, the resistance will likely drive up the voltage read at the converter and will quickly cause it to ramp down its output. I would bet this is what wa8yxm experienced.
However... I wouldn't plan my system based on this idea.