Search found 568 matches

by pss
Wed Aug 12, 2020 4:18 pm
Forum: RADIAN Series
Topic: Environmental extreme heat test in progress
Replies: 26
Views: 279

Re: Environmental extreme heat test in progress

Today, we reached an ambient temp of 99 degrees. My system is in grid tied sell. When I leave it in this mode through the daytime, beginning around 1300 hours to 1400 hours, the charge controllers cycle through BULK/ABSORB/FLOAT/SLEEPING(aka silent). The PV harvest drops to zero and the load is supp...
by pss
Mon Aug 10, 2020 5:55 pm
Forum: Off Grid Applications
Topic: Battery sizing
Replies: 13
Views: 160

Re: Battery sizing

Well I've got 8300 watts, 900 amps in 4 strings of Trojan T105-RE. I set this up when I was an Outback infant. However, after 4 years its working okay. All 4 of my strings are tied into one big copper buss bar. Anyways, with your current PV capacity, the size of your current battery bank is big enou...
by pss
Mon Aug 10, 2020 5:48 pm
Forum: MX60 Charge Controller
Topic: 6 FM60 on one buss bar AMP overload?
Replies: 1
Views: 28

Re: 6 FM60 on one buss bar AMP overload?

This ought to solve your problem. It works great for me. Search for it on amazon.com.

Wall Mounted .25" x 2" x 10" Copper Ground Bar Kit- SCGB-1KT

I use one for the positive and one for the negative.
by pss
Thu Aug 06, 2020 4:33 pm
Forum: Grid Tie Applications
Topic: Bypassing Solar
Replies: 10
Views: 137

Re: Bypassing Solar

eh?
Are we talking Canadian here? If so, I want my peameal please.
by pss
Thu Aug 06, 2020 4:30 pm
Forum: OutBack
Topic: NREL PVWatts Calculator Accuracy
Replies: 21
Views: 153

Re: NREL PVWatts Calculator Accuracy

I love this discussion thread. In my own case, I have an Outback system with Radian, FM charge controllers, batteries, mate, etc. And my second system is a grid tied with a couple of Sunnyboy's on it. It has been my experience that watt for watt, the Sunnyboy system can dump watts into the grid much...
by pss
Thu Aug 06, 2020 4:21 pm
Forum: OutBack
Topic: Too much potential?
Replies: 2
Views: 73

Re: Too much potential?

Skip, Your post says you have 2 Sunpower 360 watt solar panels connected in parallel to something, what that is, you did not say. To understand your panels, the 2 in parallel means the amperage is added and the voltage remains unchanged. If they were connected in series, the amperage would not be ad...
by pss
Wed Aug 05, 2020 9:10 am
Forum: Grid Tie Applications
Topic: Absorb/Bulk switching back and forth
Replies: 22
Views: 221

Re: Absorb/Bulk switching back and forth

My comment here may or may not be helpful. But I am now in my 4th Summer with my system and am always trying to achieve nirvana of settings. Now, I have no proof of this, I just know it to be true. In my system, which is grid tied sell enabled, I have my charge controller's voltages set 0.4 above th...
by pss
Tue Aug 04, 2020 2:15 pm
Forum: RADIAN Series
Topic: Environmental extreme heat test in progress
Replies: 26
Views: 279

Re: Environmental extreme heat test in progress

An excellent idea. Except the extreme heat wave is now over. Batteries only 86 degrees and ambient temperature is 92. Just on the cusp of the effect. Now, today, I dropped the grid connection at Noon. And since then for the last 2:08 hours the PV output and charge controller output is stable and nor...
by pss
Tue Aug 04, 2020 11:51 am
Forum: RADIAN Series
Topic: Environmental extreme heat test in progress
Replies: 26
Views: 279

Re: Environmental extreme heat test in progress

So we are back to trying to understand if the inverter is signaling the charge controllers to reduce their PV output, then essentially going down to zero PV and sleeping for a short period then going back into float/sleep or absorb/float/sleep cycle repeatedly in the day. And are there any configura...
by pss
Tue Aug 04, 2020 11:46 am
Forum: AC Coupling
Topic: How many Radians needed
Replies: 4
Views: 236

Re: How many Radians needed

I'm confused. Are you asking if you can install a Radian 8048a inverter, and a battery bank, then use the on board Radian charger fed from the grid tie to the Radian to charge the batteries? The answer to that question is yes you can. You of course will need to have the Radian tied into a load cente...
by pss
Tue Aug 04, 2020 8:08 am
Forum: RADIAN Series
Topic: Environmental extreme heat test in progress
Replies: 26
Views: 279

Re: Environmental extreme heat test in progress

Okay, so I understand the concept of selling back from the phase and wiring point of view. Now, if the big grid is 3 phase 1200 volts and tons of amperage and I am a little old 240 volts and 10 amps trying to push back against the big grid river flow, is this where the "grid impedance or grid resist...
by pss
Mon Aug 03, 2020 8:29 pm
Forum: RADIAN Series
Topic: Environmental extreme heat test in progress
Replies: 26
Views: 279

Re: Environmental extreme heat test in progress

I saw a story about this in Australia. But how exactly does a 3 phase 1200 volt power line use a transformer to downgrade to 240 volts 1 phase and then what is the source of that voltage change, is it in the 1200 volt lines?
by pss
Mon Aug 03, 2020 8:03 pm
Forum: RADIAN Series
Topic: Environmental extreme heat test in progress
Replies: 26
Views: 279

Re: Environmental extreme heat test in progress

I tried some high quality Google research about grid resistance and grid impedance. Didn't come up with much except the hotter it is, the greater the resistance of current flow into the grid. And thinking about it, I send single phase 240 volts into grid where it goes to transformer and has to becom...
by pss
Mon Aug 03, 2020 2:51 pm
Forum: RADIAN Series
Topic: Environmental extreme heat test in progress
Replies: 26
Views: 279

Re: Environmental extreme heat test in progress

My guess is that the note mentions "grid resistance" whatever that is.
by pss
Mon Aug 03, 2020 2:10 pm
Forum: RADIAN Series
Topic: Environmental extreme heat test in progress
Replies: 26
Views: 279

Re: Environmental extreme heat test in progress

I think I have the answer and I think it is because of the research done by Mike Curran. Kudos to Mike! I did some searching through the forum and came upon this link from one of Mike's old posts: http://outbackpower.com/downloads/documents/appnotes/fm_gt_mode_app_note.pdf Just before this post, I o...
by pss
Mon Aug 03, 2020 11:27 am
Forum: RADIAN Series
Topic: Bench testing.
Replies: 14
Views: 164

Re: Bench testing.

My implanted hernia mesh warranty says no lifting over 30 pounds or my guts spill out.
by pss
Mon Aug 03, 2020 10:32 am
Forum: FLEXmax Charge Controllers
Topic: Low amps mid day, help!
Replies: 18
Views: 141

Re: Low amps mid day, help!

With all due respect, the installer may have been an installer, but they did not understand what they were installing. One mate per system. Multiple inverters per mate and hub. One battery bank per system. And your charge controllers are overloaded and subject to frying.
by pss
Mon Aug 03, 2020 10:27 am
Forum: Mate3 / Mate3s
Topic: One mate3 two masters?
Replies: 21
Views: 191

Re: One mate3 two masters?

I advise you to remove power from your system both loads and PV power until you understand the proper configuration of your equipment and can correct the improper wiring. If you don't you may very well ruin some of your components, ruin your batteries and not have the AC power you need. then follow ...
by pss
Mon Aug 03, 2020 10:24 am
Forum: FLEXmax Charge Controllers
Topic: Low amps mid day, help!
Replies: 18
Views: 141

Re: Low amps mid day, help!

By separating your battery banks, you have created one 2 small lower output banks instead of a single larger bank. See my illustration posted above. You need two parallel strings of 8 batteries each, with input from each controller. You can do this with a copper buss bar. That will help supply more ...
by pss
Mon Aug 03, 2020 10:16 am
Forum: FLEXmax Charge Controllers
Topic: Low amps mid day, help!
Replies: 18
Views: 141

Re: Low amps mid day, help!

layout 8-3-20.jpg
Charge controllers should have 6 parallel strings of 2 panels in series. Use a combiner box like midnight mnpv-6
by pss
Mon Aug 03, 2020 10:00 am
Forum: OutBack
Topic: Battery arrangement/wiring question.
Replies: 17
Views: 251

Re: Battery arrangement/wiring question.

battery cables-1.jpg battery layout-1.jpg Being the dumbell that I am, I carefully laid out my batteries on the floor to help me figure out the wiring pattern I would use. Doing this helped me to know how many feet of battery 4/0 cable I would need to purchase as well as crimp lugs. Then, I made my...
by pss
Mon Aug 03, 2020 9:56 am
Forum: RADIAN Series
Topic: Environmental extreme heat test in progress
Replies: 26
Views: 279

Re: Environmental extreme heat test in progress

Okay, so I decided on Saturday to cover up my Radian and charge controllers with a thick canvas drop cloth and have the small AC units blowing on the components all day long. It was hot, the components stayed cool but I produced even less PV using the drop cloth cover than not! Hmm? My event log jus...
by pss
Mon Aug 03, 2020 9:51 am
Forum: RADIAN Series
Topic: Bench testing.
Replies: 14
Views: 164

Re: Bench testing.

wall build 4-1.jpg
wall build 5-1.jpg
install finished-1.jpg
More of the install. The load center with AC arrestor is on the right.
by pss
Mon Aug 03, 2020 9:50 am
Forum: RADIAN Series
Topic: Bench testing.
Replies: 14
Views: 164

Re: Bench testing.

Okay, here it comes! The procedure first: Have someone smart assist you. Think about what you want to accomplish. In out case, we were installing on a wall that already had drywall. We needed to bring in the conduits from outdoors through the wall and we needed to mount the Outback components which ...
by pss
Mon Aug 03, 2020 9:33 am
Forum: OutBack
Topic: Ground Mount Solar Panel Array
Replies: 16
Views: 179

Re: Ground Mount Solar Panel Array

combiner box-1.jpg
grounding rod-1.jpg
mount 13-1.jpg
Building the array supports after concrete is poured. Using a jack hammer to install grounding rod at array. And wiring in combiner box with lightening arrestor. Photo is of my electrician, not the author of this post!