Re: [RE-wrenches] Large off grid

Do they know what they are asking for?  I'm/sure/ they have filled out a load sheet?  Don't waste your time until they have carefully and thoughtfully listed ALL their loads.  I had someone sure they were going to be off-grid, had an ENORMOUS list of loads including charging 2 Teslas. 

Re: [RE-wrenches] Large off grid

Hi Aaron, Echoing some comments already, what I do with these queries: - Qualify their power needs. Is this an arbitrary 200A as stipulated by the (old) NEC square footage rules? Or is this real actual load? Needs to have some load calculations and qualification of their loads. This can

Re: [RE-wrenches] Large off grid

I would second Allan's comments; I've had huge wastes of time with folks that had no idea what they needed.  I think the most important information to share with the customer at this time, is that the code does not require a stand alone inverter system to meet the capacity calculated for the

Re: [RE-wrenches] 5 battery strings

Hi Christopher, I buy my copper buss material from McMaster Carr in appropriate dimensions for the current I am expecting. I then cut it to the lengths I need, drill for appropriate size fasteners and use 2 layers of heat-shrink tubing to protect the exposed bar. Hope this helps.

Re: [RE-wrenches] Large off grid

4 Outback Radian 8048s and 1 (or 2) RE2700 batteries. Howard “Scot” Arey 254-300-1228 scot.a...@solarcentex.com From: RE-wrenches On Behalf Of Aaron Mandelkorn Sent: Monday, July 23, 2018 6:29 PM To: RE-wrenches Subject: [RE-wrenches]

Re: [RE-wrenches] Large off grid

Definitely can stack 6 XW+ 6848's. Plenty of info on the Schneider site. You can PM me for info on this. --Dave On Mon, 23 Jul 2018 17:28:46 -0600, Aaron Mandelkorn wrote: What do you say to the person who wants "200 amp" electrical service from their off grid system. I generally use

Re: [RE-wrenches] Large off grid

Aaron, In thirty years my largest off grid residence (2005 install) had four Outback VFX3648s, with the inner two in the Quad Stack included primarily as slave battery chargers. Principle One still holds, even with today’s numerous exceptions: electricity is a high quality form of energy, best

Re: [RE-wrenches] Large off grid

Aaron Can use up to 8 radians "stacked " through their hub. One mate should control all of them. The Radians are solid and deliver a very good value. thx peter - Original Message - From: Aaron Mandelkorn To: RE-wrenches Sent: Monday, July 23, 2018 7:28 PM Subject:

[RE-wrenches] Large off grid

What do you say to the person who wants "200 amp" electrical service from their off grid system. I generally use Schneider xw+ inverters. Is it even possible to put 4 or 6 of them together? How many radians can be put together? I'm curious to know how others would proceed or is this to

Re: [RE-wrenches] 5 battery strings

Storm. https://stormpowercomponents.com/?gclid=EAIaIQobChMIoa6cg5O23AIVGMRkCh2CFwYIEAAYASAAEgJsDfD_BwE > On Jul 23, 2018, at 11:28 AM, Chris Schaefer wrote: > > What source are you all using for buss bars for these multiple battery string > set ups? > > Christopher > >> On Mon, Jul 23,

Re: [RE-wrenches] 5 battery strings

This was 22 years ago and I got my buss bars from a battery distributor who did large backup installations for telco systems. He was horrified that we in the business were paralleling series strings together in a daisy chain. Said it was the best way to give batteries an early death. I had

Re: [RE-wrenches] 5 battery strings

What source are you all using for buss bars for these multiple battery string set ups? Christopher On Mon, Jul 23, 2018 at 2:16 PM, wrote: > Separate out the individual series strings and run each string to a buss > bar setup. Remember it isn't just resistance differences between batteries >

Re: [RE-wrenches] 5 battery strings

Separate out the individual series strings and run each string to a buss bar setup. Remember it isn't just resistance differences between batteries but resistance difference between cells as well. In a setup like the existing one the resistance differences can really add up and if one

Re: [RE-wrenches] 5 battery strings

I don't think its worth all that rewiring now to preserve an imperfect battery design that's probably only going to last a few more years anyway.  Just use those batteries up, and come in with a new single or double string of larger batteries. I know all of us wrenches would like to see amp

Re: [RE-wrenches] 5 battery strings

There will be troubleshooting with this design. Probably easier to use it up and redesign. If my name was on the inheritance, I would do it now or at the minimum fuse the strings. On Mon, 23 Jul 2018 12:26:32 -0400, Chris Schaefer wrote: And it's not a bad idea to add a shunt in each

Re: [RE-wrenches] 5 battery strings

And it's not a bad idea to add a shunt in each string for trouble shooting down the road. Christopher On Mon, Jul 23, 2018 at 11:24 AM, Steve Higgins wrote: > I would at least rewire them like this... > > [image: image.png] > Remember all the parallel strings take offs must be the same

Re: [RE-wrenches] 5 battery strings

I would at least rewire them like this... [image: image.png] Remember all the parallel strings take offs must be the same size/length, otherwise you are going to exacerbate imbalance issues.

Re: [RE-wrenches] 5 battery strings

Dave Its a good idea to think of batteries the same way you do PV Modules. Any time you have more then two strings they get individual fuse protection, this is also good for diagnoses purpuses too. The current installation has no protection, safety and l would change it. As far as operation goes