<div>Hi, Technicians~</div><div></div><div>Thanks to all for the replies regarding "PV behavior when the load is a resistor". My client wants to emulate the "Divert" function aswithan old school BobierNDR-30 charge controller (& also seen with Mr. Katz' Enermaxer controller from days gone by). The 2012 twist is that we've gothighersolar wattage, higher array voltage and a wish to usenormal 240v heat elements...and no NDR-30 style charge controller with a simple "Divert" connection bolt.</div>
<div></div><div>Even once the control & switching is figured out, the other problem ishow to geta good percentageof "available wattage" to convert into heat. My takeaway from your astute comments is that MPPT type optimization would still be needed to maximize the power transmission...butthe right MPPToptimizerwould differ from anything now in production. </div>
<div></div><div>Since the impedance (resistance) ofany heat element would be wrong most of the time, thesolar arraywould be hindered fromwhat it could otherwise deliver. That's the crux of the problem, methinks.</div>
<div></div><div>My client and I will proceedusing no intervening electronics between the array and the heater, under the "some heat is better than no heat" concept. Since this project has no ability to sell excess solar wattage to the grid...but with grid power up and running the homemost of the time...we want to reclaim some of the solar array capability as heat.</div>
<div></div><div>Thanks again for shifting focus to consider the "PV into a resistor" issues.We cannow return to our regularly scheduled programming.</div><div></div><div>Jolliness,</div><div><br clear="all">
Mick Abraham, Proprietor<br><a href="http://www.abrahamsolar.com" target="_blank">www.abrahamsolar.com</a><br><br>Voice: <a href="tel:970-731-4675" target="_blank" value="+19707314675">970-731-4675</a><br>
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