[RE-wrenches] Outback VFX input voltage cycling

This thread seems to have died ... somehow it got mixed in with the "strings of different orientation" thread. If anyone has further input I would very much appreciate it as I have to schedule a long trip to remedy this and want to have as much ammunition as possible. Again, to restate the

Re: [RE-wrenches] Inverter with two strings of different orientation

Peter Parrish wrote: Bill, I looked into this several years ago, and I was able to get some digitized I-V data. I can't find that now (but I will). The data supports my claim. Vmp does change with irradiance. It just changes very little. Depends on your definition of "change" I guess. Neg

Re: [RE-wrenches] Inverter with two strings of different orientation

Bill, I looked into this several years ago, and I was able to get some digitized I-V data. I can't find that now (but I will). The data supports my claim. Let's take the simplest case (constant cell temperature) and what was a fairly popular PV module: Kyocera's KC200GT. Although it is a little

Re: [RE-wrenches] Building integrated thermal collectors?

Good points made, Karl...esp the one about "every btu reduces the load on the backup water heater". My takeaway from that is that even if the Dawn system can only preheat water for the main heater, that's still something. I assume that the solar fraction could never reach 100%, but that's often the

Re: [RE-wrenches] Building integrated thermal collectors?

I will beg to differ on the space heating properties. domestic hot water can use any degree above about 50 degF here in wisconsin. every btu reduces the load on the backup water heater. pool heating is just fine with anything above 80 degrees or so (pool temps 80-85 deg) and space heating i