Search found 391 matches

by provo
Tue Jul 07, 2020 5:30 pm
Forum: OpticsRE
Topic: Accuracy of Mate 3 data
Replies: 1
Views: 13

Re: Accuracy of Mate 3 data

I don't sell back, so can't comment to that, but my From Grid as reported in Optics (and presumably on the Mate3s) is always lower than the daily values I download from the utility website. Optics values are typically 10-20% lower than what the utility thinks they send me.
by provo
Tue Jul 07, 2020 9:46 am
Forum: Off Grid Applications
Topic: Any good sources for setting up a off grid system that runs with the meter?
Replies: 3
Views: 28

Re: Any good sources for setting up a off grid system that runs with the meter?

Note to sell back to the grid (legally) in the U.S. you must obtain a net metering permit from your local utility - just one of those many nitty gritty details. George: Where are you located? Are there already lots of grid-tied systems near you? I think about getting net-metered sometimes, and I ju...
by provo
Mon Jul 06, 2020 5:19 pm
Forum: OutBack
Topic: Charging Only From Solar
Replies: 19
Views: 124

Re: Charging Only From Solar

headsavers wrote:
Mon Jul 06, 2020 5:11 pm
How do I create a new post?
The list of forums can be found by clicking on Board Index near the top of this page. Once you click on the appropriate forum for your subject, the New Topic button shows up and you click on that.
by provo
Mon Jul 06, 2020 11:05 am
Forum: Off Grid Applications
Topic: Design my dream off grid system
Replies: 8
Views: 47

Re: Design my dream off grid system

Just a personal anecdote -- when I lived in Silicon Valley, I got my electric consumption down to 14kWh a day and thought I was doing great. Since I went off grid in the boonies I'm around 5kWh daily. It's a Good Idea to try hard to reduce your consumption, for many reasons.
by provo
Sun Jul 05, 2020 12:40 pm
Forum: FLEXnet DC
Topic: How does the FNDC determine which sources are connected to it’s terminals?
Replies: 12
Views: 133

Re: How does the FNDC determine which sources are connected to it’s terminals?

I think you're missing a crucial point here -- the connection between the PV panels and the charge controller is completely independent from the connection between the charge controller and the batteries. The charge controller is a DC-to-DC converter, in a similar way that a transformer is an AC-to-...
by provo
Sat Jul 04, 2020 2:29 pm
Forum: OpticsRE
Topic: OpticsRE says I have a magic free energy machine...
Replies: 43
Views: 468

Re: OpticsRE says I have a magic free energy machine...

TCabin76 wrote:
Sat Jul 04, 2020 2:16 pm

how can the Optice RE list current from solar and to battery as separate graph bars if both of those currents go through the same shunt?

The From Solar data doesn't go through any of the FNDC shunts -- it goes directly from the FM80 to the Mate, presumably through the Cat5 cables.
by provo
Sat Jul 04, 2020 2:09 pm
Forum: OpticsRE
Topic: OpticsRE says I have a magic free energy machine...
Replies: 43
Views: 468

Re: OpticsRE says I have a magic free energy machine...

TCabin76 wrote:
Sat Jul 04, 2020 1:24 pm

how is any of the PV current going to go through shunt B?
It's not, and you don't want it to -- only the batt minus of the FM80 should go to the shunt.
by provo
Sat Jul 04, 2020 10:05 am
Forum: OpticsRE
Topic: OpticsRE says I have a magic free energy machine...
Replies: 43
Views: 468

Re: OpticsRE says I have a magic free energy machine...

Moving the PV - to the battery side of the shunt has induced a huge error on the OpticsRE summary screen. I would highly suggest reading up on the basic principals of current measurement via shunts - separated from the mental rabbit hole you are creating for yourself by messing with the system wiri...
by provo
Sat Jul 04, 2020 9:49 am
Forum: FLEXnet DC
Topic: How does the FNDC determine which sources are connected to it’s terminals?
Replies: 12
Views: 133

Re: How does the FNDC determine which sources are connected to it’s terminals?

Presumably the FNDC would need to know what current source it is measuring at each of it’s terminals to make accurate calculations, but I have been unable to find information on how it does this... I give up - I’m baffled. How does the FNDC know which shunt measurement to match up with it’s interna...
by provo
Sat Jul 04, 2020 5:44 am
Forum: FLEXnet DC
Topic: Parameters met but system stays in Absorb
Replies: 20
Views: 109

Re: Parameters met but system stays in Absorb

The FNDC does control charge termination, quite neatly, IME, for all chargers. It's the only way, actually, to get an accurate charge termination using amperage (Charged Return Amps) and voltage (Charged Voltage) as the metrics. Good to know! I hate it when a manual tells you something that's TRUE,...
by provo
Fri Jul 03, 2020 8:15 pm
Forum: FLEXnet DC
Topic: Parameters met but system stays in Absorb
Replies: 20
Views: 109

Re: Parameters met but system stays in Absorb

LOL! I'm going to stir the Pot of Confusion just a bit more. Using End Amps on the FM80 to terminate the Absorb phase is a bit of a crap shoot. Since the charge controller only knows what amperage its sending to the battery, and not what amperage is concurrently being drawn from the battery, settin...
by provo
Fri Jul 03, 2020 7:46 pm
Forum: FLEXnet DC
Topic: Parameters met but system stays in Absorb
Replies: 20
Views: 109

Re: Parameters met but system stays in Absorb

I've been steering you wrong here. Charge Termination Control only applies to charging with inverters: Charge Termination Control.jpg If you want the FM80's to stop absorbing at a particular value of end amps, that can be done in the FM80 settings (Advanced menu --> Absorb End Amps.) I don't think i...
by provo
Fri Jul 03, 2020 7:19 pm
Forum: FLEXnet DC
Topic: Parameters met but system stays in Absorb
Replies: 20
Views: 109

Re: Parameters met but system stays in Absorb

Okay, so is it the general consensus that both Global Charger Control and Auto Charge Termination Control should be enabled in the MATE3 Global Charge settings... And then Grid-Tie Mode needs to be enabled in the FM80 misc settings ? No. Only Auto Charge Termination Control needs to be enabled in t...
by provo
Fri Jul 03, 2020 2:24 pm
Forum: FLEXnet DC
Topic: Parameters met but system stays in Absorb
Replies: 20
Views: 109

Re: Parameters met but system stays in Absorb

So any thoughts on what the “Maximum Battery Charge” parameter there is controlling? Is that a global current limit, or related to one of the other parameters on that page, or...? That's the total of all the currents that might be charging at the same time (say, from two FM80's and two inverters wo...
by provo
Fri Jul 03, 2020 1:54 pm
Forum: FLEXnet DC
Topic: Parameters met but system stays in Absorb
Replies: 20
Views: 109

Re: Parameters met but system stays in Absorb

Yes, I found that bit in the manual too. I Was trying to digest the part about the FM80 needing to be in GT mode (assume that means grid tie...?). We are an off grid system and the only AC input the Inverter/chargers see is when the genny kicks in (rare). After reading the passage a bit more, I sta...
by provo
Fri Jul 03, 2020 1:31 pm
Forum: FLEXnet DC
Topic: Parameters met but system stays in Absorb
Replies: 20
Views: 109

Re: Parameters met but system stays in Absorb

I assume both the highlighted should be changed to enabled - yes? Here's what the Mate3s manual says about Global Charger Output Control: Global Charger Control.jpg For just having the FNDC stop absorb when charge parameters are met, you only need to enable the Auto Charge Termination Control. oops...
by provo
Fri Jul 03, 2020 12:20 pm
Forum: OutBack
Topic: Charging Only From Solar
Replies: 19
Views: 124

Re: Charging Only From Solar

One FlexNet DC Two FM80-150VDC Two INV VFXR3524A The system was professionally installed so I expect (hope?) that what you've said isn't an issue. I was off-grid with it when it was installed and I've since moved my tiny house and I am operating it under mini-grid now (with a grid connection). 4320...
by provo
Fri Jul 03, 2020 11:22 am
Forum: OutBack
Topic: Charging Only From Solar
Replies: 19
Views: 124

Re: Charging Only From Solar

Fine points are important. Thanks :) What are the exact model numbers of the two inverters? FXFR is not valid -- VFXR or FXR, followed by some numbers and possibly a letter, would be. Are your 24V Relion batteries in series (a 48V pack), or in parallel (a 24V pack)? Do you have one FM80 or two? Dep...
by provo
Fri Jul 03, 2020 9:37 am
Forum: OutBack
Topic: Charging Only From Solar
Replies: 19
Views: 124

Re: Charging Only From Solar

Hello, I want my batteries to charge only from solar power. I am presently using the MATE3 in mini grid mode. It does a good job at connecting to the grid when the batteries are drained in the middle of the night; however, when I wake up in the morning, the batteries are fully charged and the inver...
by provo
Thu Jul 02, 2020 3:51 pm
Forum: FLEXmax Charge Controllers
Topic: FM80 won't wake up after batteries discharged
Replies: 5
Views: 74

Re: FM80 won't wake up after batteries discharged

raysun wrote:
Thu Jul 02, 2020 3:43 pm

48V battery, yes?

What is FM80 Bat +/- voltage?

What is FM80 PV +/- voltage?

Says he has six t-105's, so I'm thinking 3 strings of 2 for 12V ...
by provo
Wed Jul 01, 2020 3:17 pm
Forum: Off Grid Applications
Topic: Newbie Questions (help needed) Off Grid in the Desert (and HOT) Help Needed :)
Replies: 4
Views: 74

Re: Newbie Questions (help needed) Off Grid in the Desert (and HOT) Help Needed :)

I noticed that the Flex 80's read these statistics: PV (Amps) Input Flex80 unit #1 16A Flex80 unit #2 16A Flex80 unit #3 33A So i think that means that about 65 amps is coming in from the solar panels? So for Question #1: I noticed that on my Outback MATE on the ADV/FX/CHARGER screen, where you set...
by provo
Wed Jul 01, 2020 2:23 pm
Forum: Off Grid Applications
Topic: Newbie Questions (help needed) Off Grid in the Desert (and HOT) Help Needed :)
Replies: 4
Views: 74

Re: Newbie Questions (help needed) Off Grid in the Desert (and HOT) Help Needed :)

It would be great if you could fill out your profile with a complete and detailed list of all your components, make and model, etc. You've told us about the VFX inverters and the FlexMax charge controllers (usually abbreviated FM80). You have a Mate, but what kind? The original oval shaped Mate, or ...
by provo
Tue Jun 30, 2020 2:51 pm
Forum: OpticsRE
Topic: OpticsRE says I have a magic free energy machine...
Replies: 43
Views: 468

Re: OpticsRE says I have a magic free energy machine...

Well it looks like the panels are on top of a pole, held by an apparatus that appears to be able to rotate. I need to get up there and check but it appears that Loosening a couple bolts should allow it to rotate L/R o top of the pole. Is there something else that would limit that rotation? I mean, ...
by provo
Tue Jun 30, 2020 1:47 pm
Forum: OpticsRE
Topic: OpticsRE says I have a magic free energy machine...
Replies: 43
Views: 468

Re: OpticsRE says I have a magic free energy machine...

In our set up I see a plus/minus pair from each of the panel strings (4 pairs) disappearing into the conduit outside, then inside on the other end I see just a plus/minus PV exiting the conduit into the DC box. I don’t know how they’re combined in between those two places. Well, if you ever need an...
by provo
Tue Jun 30, 2020 12:39 pm
Forum: Off Grid Applications
Topic: Best practices for off grid battery life?
Replies: 17
Views: 235

Re: Best practices for off grid battery life?

Actually, if this is your battery,

https://gb-battery.com/products/ols/pro ... ery-module

the 20h capacity is 938Ah, not 980Ah.