Re: [RE-wrenches] Jacobs Wincharger Book, 1978?

Larry, It was either Wind and Windspinners or The Homebuilt, Wind-Generated Electricity Handbook, both by Michael Hackleman with substantial contribution by Windy Dankoff. Allan Sindelar On Wed, Aug 24, 2011 at 9:56 PM, Larry Crutcher, Starlight Solar Power Systems wrote: > This one's for you ol

[RE-wrenches] Jacobs Wincharger Book, 1978?

This one's for you old timer wind wrenches. Back in 1978 I bought a book on wind generators and rebuilding the Jacobs Winchargers. It was a paperback about 11"X 9". This book was my introduction to renewable energy. Does anyone remember the name or author? On a long shot, does anyone have a c

Re: [RE-wrenches] Enphase 215

William It seems like the product tries to be everything to all mod manu's, which is hard to do, at best. Don't know if its a limitation in the electronics or design architecture. Could also be a strategic position to clamp down on what can be plugged into the circuit per NEC to limit their ex

[RE-wrenches] SS wire retainer clips

Hello Wrenches, I'm buying a system from a distributor that says they do not carry the stainless steel retainer clips because installers can get these cheaper from local electrical suppliers. I've never seen such a thing at an electrical supply. Does anyone know an electrical supplier that

Re: [RE-wrenches] Enphase 215

Keith: Her's my guess: Through the MPPT algorithm. The processor indicates near maximum output, the MPPT impedance reduces to throttle back power production. This is pure speculation, but I'm stickin' with it (untold told otherwise). Throwing away power? Yes. If MPPT is not at maximum pow

Re: [RE-wrenches] Enphase 215

All, Please note that I left Enphase about one year ago, and joined John Berdner at SolarEdge. To answer the question, virtually all inverters will deliver more power than their rating. The Max power test for listing on the CEC list of eligible inverters requires a full power run at elevated

Re: [RE-wrenches] Enphase 215

David, et al Yes, their literature states max output power of 215. Not sure how that is controlled, except for electronically.  So this could be the shunt, so to speak and must take into consideration voltage to follow some algorithm to keep things humming along at that threshold. Having said

[RE-wrenches] ITS30R?

Wrenches, It appears that Iota no longer offers the ITS30R transfer switch. Is there an alternative that you would recommend? Jeremy All Solar, Inc CO, USA ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Op

Re: [RE-wrenches] AUO Unison integrated inverter modules

Has anyone gotten their hands on the AUO modules with the built in micro inverter? Cut sheets on mono and poly modules. AC Unison PM240PA0 AC Unison PM250MA0 David Palumbo Independent Power LLC 462 Sol

Re: [RE-wrenches] Enphase 215

According to my discussions with Enphase on this subject, the M215 can actually put out 225 watts continuous. Marv? Please confirm. marco The inverter should be current-limited on its output. The other Enphases have a higher output power than rated (199 @ 190, 219 @ 210, if memory serves from

Re: [RE-wrenches] Enphase 215

The inverter should be current-limited on its output. The other Enphases have a higher output power than rated (199 @ 190, 219 @ 210, if memory serves from earlier list posts), so this may have a similar window. 215Wac max inverter output / 240V = 0.896 0.896 x 17 = 15.23A 15.23A x 1.25 < 20A s

Re: [RE-wrenches] Enphase 215

Do the 215's output more than 215 Watts? From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Keith Cronin Sent: Wednesday, August 24, 2011 12:21 AM To: RE-Wrenches Subject: [RE-wrenches] Enphase 215 Hey gang With the 215's on

Re: [RE-wrenches] Lithium Ion Phosphate for grid back up

Larry, You are right, the battery bank voltage drives the PWM constant voltage of the controller. The MPPT is a higher frequency DC/DC converter driving the PV module I-V curve to max power point, to which a 300 Hz PWM constant voltage is combined. John From: re-wrenches-boun...@lists.re-wren

[RE-wrenches] Enphase 215

Hey gang With the 215's on the scene and the tech literature on their website, they state you can put up to 17 modules on a string. Locally, I see folks throwing on 17-235 watt modules. Back of the napkin- 235 watts/240 volts = .97 amps. 17 x .97 = 16.49 amps on the 20 amp circuit. Pushing the

Re: [RE-wrenches] Lithium Ion Phosphate for grid back up

Hi John, Current is not reduced "due to" the PWM or the MPPT process ass you described. Current is reduced as a function of the electro-chemical process causing the internal resistance to increase as the cells reach full absorption. The PWM regulation only controls voltage. MPPT is only convert

Re: [RE-wrenches] Pump

Hi Jeff, Do you see the increased pressure on the pump submerged an extra 180' deep as a non issue? I know with cheaper pumps it is an issue to consider. Here in the soggy northeast static water levels hardly fluctuate at all. Dave From: re-wrenches-boun...@lists.re-wrenches.org [mailto

Re: [RE-wrenches] Lithium Ion Phosphate for grid back up

Darryl, Lead acid battery typically recommended bulk charge is 10-15% of C20 for the flooded lead acid and 20 -25% of C20 for the sealed valve regulated lead acid. Depending the application and the environment, these rates could be optimized, on a case by case basis. As the battery voltage rai

Re: [RE-wrenches] Lithium Ion Phosphate for grid back up

Hi Darryl, When looking at off-grid systems, in your opinion, how often is there excess current, i.e. more amps from the PV / Charge Source than can be absorbed & approximately what percentage of capacity? Looking at Lithium Ion, like NMC, you can recharge at 2x Capacity (so 1/2 hour rechar

Re: [RE-wrenches] Pump

I sure would put the pump near the bottom assuming the pump is rated for the submersion, perhaps 10-20' off the bottom. The only down side is the extra drop pipe and cable and that is pretty small price to add to the overall project and assures the best yield possible over the long system and we

Re: [RE-wrenches] Lithium Ion Phosphate for grid back up

One of the advantages of LiFeP is the fast rechange rate.  I have found that fast recharge is very hard on LA batteries, if they are recharged faster they fail sooner.  Perhaps Jamie or others could answer is there something that can be recharged fast?  Capasitors are almost impossible to work w

Re: [RE-wrenches] new outback inverter

yes Todd I am looking forward to using this inverter, I have two applications, grid tied that need three phase, so I am out of luck.  for now as OUtback has not released a three phase version.  The gen support on standalone for good gens sounds great if gen is low quality it can still charge f