EcoRenovator - View Single Post - Dump the plumbing and use PV to heat water?

Xringer · 04-13-10, 08:30 PM

Been dreaming of some of the smaller PV panels for this hot water idea..

Two of these ($707 shipped) would fit the tracker with some room to spare..
120w solar panel, solar module 120w

* 36pcs of 156x156mm multicrystalline solar cells (made in USA)
* Pmax: 120W
* Vmp: 17.6V
* Imp: 6.81A
* Voc: 21.82V
* Isc: 7.46A
* Size: 58.27"x26.61"x1.97"
* Weight: 28.3lbs
* UL, TUV and CEC listed

I'm just wondering what would be the best way to deliver the max amount
of juice to the heating element in the boiler.?.

I've been thinking about using a 12V load resistance (~0.6 ohms), driven by one of those BZ MPPT250HV 25A,12V
Maximum Power Point Tracking (MPPT) PV Charge Controllers..

Solar Cell, Solar Panel, Solar PV, Solar Products, Charge Controllers, Solar Trackers - BZ MPPT250HV 25A,12V for Higher Input Voltage

But instead of charging a battery, it would be trying to deliver max amps at 12 volts into a load.?.

OR, just use the less complex plain resistive load.

Comments please..

Thanks,
Rich

04-13-10, 08:30 PM	#17
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	Been dreaming of some of the smaller PV panels for this hot water idea.. Two of these ($707 shipped) would fit the tracker with some room to spare.. 120w solar panel, solar module 120w * 36pcs of 156x156mm multicrystalline solar cells (made in USA) * Pmax: 120W * Vmp: 17.6V * Imp: 6.81A * Voc: 21.82V * Isc: 7.46A * Size: 58.27"x26.61"x1.97" * Weight: 28.3lbs * UL, TUV and CEC listed I'm just wondering what would be the best way to deliver the max amount of juice to the heating element in the boiler.?. I've been thinking about using a 12V load resistance (~0.6 ohms), driven by one of those BZ MPPT250HV 25A,12V Maximum Power Point Tracking (MPPT) PV Charge Controllers.. Solar Cell, Solar Panel, Solar PV, Solar Products, Charge Controllers, Solar Trackers - BZ MPPT250HV 25A,12V for Higher Input Voltage But instead of charging a battery, it would be trying to deliver max amps at 12 volts into a load.?. OR, just use the less complex plain resistive load. Comments please.. Thanks, Rich