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Makes sense, Thanks

133 X 1.8 = 239w The element is rated 240v and 4000W. The 30v was the failed Voltage measurement that could not be used (termed above "meaningless") due to the output frequency. Above 35/38 to 4000, Read 3500/3800 to 4000. Kinda sloppy on my part, Edward

Got some readings today, 164 open volts, 133 under load, Input to actii model 7392 Controller, 1.8amps is 230w and close to displayed output. Although output to element measures 2 amps times 30V?? Would assume measure Technique error as not AC or DC?

I used the davidpoz.com Spreadsheet but derated (lowered) the factory volts and amp outputs. This seemed to raise the wattage from 35/38 to 4000 at 240V. I am assuming I will produce the factory specified output little or no time. Still not enough sun here to gauge any real output.

The display is working at <100v and the Out LED is Flashing "Flashing out LED indicates that power is feeding to the heater." from supplied (and online) instructions.

My error... 240v/4000W element 14/15 ohms. & Please note I have 4 20v panels where 24v panels may break the 100v lower limit. (my 20's produce 154v open circuit, but 94v under load). I can add one panel (5 20's) to get into range. I'll know when I get some sun and good instrument readings. I...

Hi, The newer one is higher wattage. I have it installed with my 4 panels/series. I can't get any data yet because with the panels under load I have less than 100v with winter sun (lat 45). The unit instructions say it will only function MPPT at more than 100v and suggest the setting for turn...

Thanks, is the pictured board sold anywhere?

Thanks, This unit is powered internally but I do see provisions for external 12VDC. My panels are spec'd at 20V/320W The Vmp is 34.1V Imp 9.37A. If I understand you, I will have 34x4 at full power but closer to 30x4 at say 50%. Where are the details for your control...

Hi, The Spec. page for the actii 7392 controller (from Europe for 3KW resistance heat) reads "Panel Voltage 10 to 350VDC". The User Manual reads "Panel tension From 120V to 350V DC", (tension is usually same as voltage). Does any know why this is, my poor understanding, or a translation...