Re: [RE-wrenches] NON Digital Hydrometer

Hmm….Are they really safer? 1) Put rubber gloves on and remove battery caps. The chance of getting electrolyte on the gloves pretty high, especially after checking a couple dozen cells. 2) Extract electrolyte with pipet. Dribbles here and there 3) Place drop on Refractometer. More Dribbles

[RE-wrenches] Cable tray

Hello wrenches, question about running conductors in cable tray. So we have our allowance in 690.31(C)(2) for using small PV Wire in cable tray for PV source and output circuits. I'm trying to determine what adjustment factor to apply when there are a bunch of small conductors. 392.80(A)(2)(a)

[RE-wrenches] Non-conductive module frames

Friends: I thought I had sent a message about this to the list but I believe not. My apologies if this is a repeat. We have been having trouble with corrosion on an installation on a beachfront residence. Here is a link

Re: [RE-wrenches] Digital Hydrometer

Allan: I know this has come up before on the list, but I was hoping someone had gained experience since the last time this was posted. I am familiar with the optical refractometers. We order them by the dozen. I have taken thousands of readings with them. They have distinct difficulties

Re: [RE-wrenches] Non-conductive module frames

William, The only framed modules I've seen with a non-conductive frame are BIPV modules. They were about 34W each and integrated with concrete roof shingles/tiles. I believe the frame was polycarbonate. We ended up removing a 6kw system of these because some of the glass started delaminating

Re: [RE-wrenches] Non-conductive module frames

Willi, I haven't yet heard of plastic framed modules (and candidly, I hope I never do). I have heard of frameless modules. Essentially glass on top and glass on bottom. No metal (except for the mounting hardware). Hopefully you don't want to use plastic for that. One of these manufacturers

Re: [RE-wrenches] Non-conductive module frames

I am currently doing a lumos project and that is the only mod I can picture that comes close to fulfilling your need. We still have alum racking however Interesting question though. Jesse Sent from my iPhone > On Aug 31, 2015, at 5:22 PM, William Miller wrote: >

Re: [RE-wrenches] Non-conductive module frames

William LUMUS makes a glass on glass frame-less module, they say to use there racking but give them a call and see i don't have a email for them so google away good luck. BTW we work also very close to the ocean and we sometimes get salt build up on the micro inverters but i have not seen any

Re: [RE-wrenches] Digital Hydrometer

A while back I asked about a dream system for my electrical/solar training program at the CC I teach at. I think an instrument like the one you linked to fits that bill. I sent an email requesting a price quote to the company just now. Checking the price via google seems a touch more expensive

Re: [RE-wrenches] Cable tray

Brian, I don’t know that I have a lot of good news for you. I have looked into this and I really don’t see a good way out of making some pretty conservative assumptions. You can read what I wrote in my IAEI article on Support of Exposed Cable earlier this year. I get into ampacity briefly

Re: [RE-wrenches] NON Digital Hydrometer

I love my refractometer, but my Intro to PV students find it intimidating having battery acid so close the their eyes and clothes, even with proper PPE. I've found the Midnite Solar one a good compromise, and it is temperature corrected.

[RE-wrenches] NON Digital Hydrometer

I second this in the best tool ever category. The refractometer is extremely accurate, uses only a drop of electrolyte, cleaner, safer, & less intrusive. AND the darn thing will not break unless you drop it on the floor unlike how many glass hydrometers over the years. I would have to add easier