Re: [RE-wrenches] Side-by-side microinverter, maximizer, and conventional inverter comparisons

Hello Bill, Henk Oldenkamp is the inventor of the OK4U microinverter. Perhaps David Katz knows what Henk is up to lately. The OK4U inverter that I first tested on the Solec International factory roof in 1994 worked ok (as specified). The central inverters vs. multiple small inverters side-by-

[RE-wrenches] "Colored" Solar Panels

The is a relatively new company in Southern California, Gold Coast Solar, that is marketing colored PV panels a/k/a "Stylish Solar Panels™". Back in late-2010, they were in the process of getting CEC listing. They are not listed today, at least not under "Gold Coast". They made some technically i

Re: [RE-wrenches] Hydrometer source

We pay $85 each on a 1x purchase, thru the local Fergusson plumbing supply. Totally worth it. Dana Orzel Great Solar Works, Inc E - d...@solarwork.com V - 970.626.5253 F - 970.626.4140 C - 970.209.4076 web - www.solarwork.com "Responsible Technologies for Responsible People since 1988

[RE-wrenches] Hydrometer source

Your local NAPA auto parts has several grades of refractometers and back when we used hydrometers they cut pretty good deal if you purchased 10+. Check first to see which one is the better, I have not bought any in 5 years. Dana Orzel Great Solar Works, Inc E - d...@solarwork.com V - 970.62

[RE-wrenches] Fwd: Hydrometer source

We have been using a digital unit for a few years - Sper Scientific 300055 Pocket Digital Refractometer - expensive ($300+), but it appears to be very accurate. has built-in temperature compensation. John McNicholas NABCEP Certified Solar PV Installer ™ Key Power Services, Inc. Begin forw

[RE-wrenches] Hydrometer source

I have probably put this out before - we use refractometers a light refracted measuring device. Works on Propylene glycol, ethylene glycol and battery electrolyte. You take 1 drop out of the battery to test VS. 1/8 cup. I think it is less invasive. The reading is instantaneous. No jiggling and d

Re: [RE-wrenches] Hydrometer source

http://www.wescotools.com/p-208-robinair-75240-coolant-and-battery-refractometer.aspx At 07:56 AM 5/9/2011, you wrote: Content-Type: multipart/alternative; boundary="=_NextPart_000_011F_01CC0E37.B616CF00" Content-Language: en-us Hi Dave, We use and recommend NAPA 700-1145. $12.0

Re: [RE-wrenches] Hydrometer source

http://www.rwctesting.com/engine.htm RWC carries refractometer type hydrometers that are much more accurate and easy to read. SG reads 1 .100 to 1.400 in 0.01 increments, temp compensation is automatic, F or C scale. Doesn't need to be flushed out after each use to remain accurate and best of a

Re: [RE-wrenches] Hydrometer source

Sears auto locally sells them off-the-shelf. About $7 as I recall. Kirk Herander VSE On May 9, 2011, at 10:56 AM, "Rob Shappell" wrote: > Hi Dave, > > > > We use and recommend NAPA 700-1145. $12.00 I am starting to look at digital > Refractometers. Any recommendations? > > > > Rob Sh

Re: [RE-wrenches] Hydrometer source

Hi Dave, We use and recommend NAPA 700-1145. $12.00 I am starting to look at digital Refractometers. Any recommendations? Rob Shappell From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Dave Palumbo Sent: Monday, May 09, 20

Re: [RE-wrenches] Working on metal roofs.

I would add that Korkers makes a product that I find superior for work on metal roofs. Unfortunately they seem to switch their pad composition regularly and the new version lasts a day at best. Korkers are also over-shoes which can be a pain in the neck unless the fit is perfect. Cougar Paws are

Re: [RE-wrenches] Hydrometer source

We get them from our Deka warehouse-- Ken - Original Message - From: "Howie Michaelson" To: "RE-wrenches" Sent: Monday, May 09, 2011 8:44 AM Subject: Re: [RE-wrenches] Hydrometer source Hi Dave, I've had luck at various automotive/hardware stores finding appropriate (5/1000's

Re: [RE-wrenches] Working on metal roofs.

Ditto Mark's and Bob's reply - Cougar Paws are the only thing I'll wear on a pitched asphalt roof. They're worth every penny. Gary Willett, PE Icarus Engineering/Solar Services LLC NABCEP Certified Solar PV Installer # 031310-246 On 5/8/2011 11:37 PM, Mar

Re: [RE-wrenches] Side-by-side microinverter, maximizer, and conventional inverter comparisons

Joel, As I remember Trace rebranded the (nominal 100 watt) OK4U units as MicroSine about 2000 AD. Didn't SMA (or someone else) recently take over the OK4U product line? Do I understand you were not impressed with the MPPT OK4U microinverters performance (vs. the non-MPPT SMA?) under full sun? D

Re: [RE-wrenches] Metal roof w/o standing seams.

Hi Jesse, I never did scab, having similar concerns of not doing it right, and use blocking. Best, Jason On May 7, 2011, at 6:46 PM, Jesse Dahl wrote: > Jason, > > If you scab onto a truss, is there a certain length the scab board should be? > I have never heard of this practice. I wo

Re: [RE-wrenches] Hydrometer source

Hi Dave, http://www.freasglass.com/ These are the upscale hydrometers Backwoods did stock when Steve ran the place. USA manufactured product. Bill Loesch Solar 1 - Saint Louis Solar 314 631 1094 - Original Message - From: Dave Palumbo To: 'RE-wrenches' Sent: Monday, May 09,

Re: [RE-wrenches] Hydrometer source

New England Solar carries them at a reasonable price. On 5/9/2011 8:17 AM, Dave Palumbo wrote: We used to buy temperature compensated hydrometers from AEE to include with the sale of a battery bank for off grid customers. My sales person says AEE is no longer carrying that item. I believe the

Re: [RE-wrenches] Hydrometer source

Hi Dave, I've had luck at various automotive/hardware stores finding appropriate (5/1000's gradations) hydrometers for under $10. They are not temp compensated however. Howie -- Howie Michaelson NABCEP Certified Solar PV Installer™ Sun Catcher, LLC Renewable Energy Systems Sales and Service VT

Re: [RE-wrenches] Hydrometer source

We used to buy temperature compensated hydrometers from AEE to include with the sale of a battery bank for off grid customers. My sales person says AEE is no longer carrying that item. I believe they were made by Dekka. Recommendations for a new source for battery hydrometers in the $8 to $ 15