Search found 388 matches

by jnh
Thu Jul 02, 2020 5:17 pm
Forum: OutBack
Topic: GVFX3648 not staying in Support
Replies: 18
Views: 549

Re: GVFX3648 not staying in Support

Hi Mike; Hi All this system was new in 2007, there does not seem to be a HBX mode on the tan oval Mate. the inverter is GVFX3648, 2600w PV, new 500Amphr AGM bat the system is set to "No Sell" is it not possible to use PV and Bat during day to power Inverter AC output loads? even w/o grid help (that...
by jnh
Tue Jun 16, 2020 6:29 am
Forum: OutBack
Topic: GVFX3648 not staying in Support
Replies: 18
Views: 549

Re: GVFX3648 not staying in Support

So long as sell-back is disabled on a GVFX, the inverter will only supply AC power when disconnected from the grid, whether via a manual or automatic (e,g, HBX-initiated) AC DROP command from the Mate, or from having automatically switched to standalone mode due to a grid outage. In "no sell" mode i...
by jnh
Thu May 21, 2020 9:27 am
Forum: FLEXnet DC
Topic: FNDC -batt connection
Replies: 5
Views: 617

Re: FNDC -batt connection

I don't see any potential downside to this, other than perhaps slightly inaccurate battery voltage readings when heavy currents are flowing through the shunt your FNDC Bat- sense lead is on, and possibly extra noise in the voltage-sense input from not being on a twisted pair all the way to the batte...
by jnh
Thu May 21, 2020 8:54 am
Forum: Grid Tie Applications
Topic: HBX together with grid-tie? (post-outage 5-minute UL1741 lockout)
Replies: 7
Views: 946

Re: HBX together with grid-tie? (post-outage 5-minute UL1741 lockout)

Consider that 5 minutes of lost selling represents about 408 watthours for your 4.9kw PV array. At $0.15/kwh, that's just about $0.06 worth of lost savings. Doesn't seem worth all the effort, no? Fair point that even if these grid blips were happening regularly, it wouldn't make much sense to spend...
by jnh
Wed May 20, 2020 2:01 am
Forum: Off Grid Applications
Topic: System won't Energize
Replies: 5
Views: 770

Re: System won't Energize

I'm a newbie to solar so please forgive my naivete. Last summer I purchased a property in rural CO with a Yurt and off-grid solar (FLEXPower ONE, 2012 vintage). I live in CA and over the winter had a caretaker visit the property every month to check the system and confirm the batteries SOC. The sys...
by jnh
Wed May 20, 2020 1:43 am
Forum: Grid Tie Applications
Topic: HBX together with grid-tie? (post-outage 5-minute UL1741 lockout)
Replies: 7
Views: 946

Re: HBX together with grid-tie? (post-outage 5-minute UL1741 lockout)

We had several brief outages today, over the span of a couple of hours, and it was annoying to see the system spend so much time under full sun, loafing along at minimal power output (covering only DC loads & battery float) while waiting for the grid-tie lockout period to expire. I thought about tr...
by jnh
Wed May 20, 2020 1:30 am
Forum: Grid Tie Applications
Topic: HBX together with grid-tie? (post-outage 5-minute UL1741 lockout)
Replies: 7
Views: 946

Re: HBX together with grid-tie? (post-outage 5-minute UL1741 lockout)

We had several brief outages today, over the span of a couple of hours, and it was annoying to see the system spend so much time under full sun, loafing along at minimal power output (covering only DC loads & battery float) while waiting for the grid-tie lockout period to expire. Are you saying tha...
by jnh
Fri May 15, 2020 12:31 pm
Forum: Grid Tie Applications
Topic: HBX together with grid-tie? (post-outage 5-minute UL1741 lockout)
Replies: 7
Views: 946

HBX together with grid-tie? (post-outage 5-minute UL1741 lockout)

Has anyone experimented with using HBX mode as a fallback during times when grid-tie operation is locked out due to the UL1741-mandated 5 minute delay following a utility outage? We had several brief outages today, over the span of a couple of hours, and it was annoying to see the system spend so mu...
by jnh
Thu May 14, 2020 6:18 am
Forum: FLEXmax Charge Controllers
Topic: Array 1920w or 2500w for FM80??
Replies: 28
Views: 2237

Re: Array 1920w or 2500w for FM80??

Nice! Did you take apart your FM80 to use as a model for where the cutout and duct should be, or just try to judge by the internal layout, heatsink position and such? Guessing you probably blocked the front fan-exhaust opening too? I'd imagine the only differences between those control boards might ...
by jnh
Mon May 11, 2020 1:53 pm
Forum: Off Grid Applications
Topic: VFXR efficiency at very low loading
Replies: 28
Views: 3047

Re: VFXR efficiency at very low loading

Just as another data point, early this morning I opened the AC-In breaker again when load on my GVFX3524's subpanel was very low, only 23W (dormant appliances, some computers in sleep mode, GFCI outlets, etc.) as measured by the Brultech GEM. Actually 23.3W, averaging 10 samples taken once/second. T...
by jnh
Sun May 10, 2020 8:38 pm
Forum: Off Grid Applications
Topic: VFXR efficiency at very low loading
Replies: 28
Views: 3047

Re: VFXR efficiency at very low loading

Efficiency is definitely poor at low power levels, though, with the biggest contributor being (as already mentioned) the inverter's self-consumption at zero load, which I've measured at about 20W. Much of this is power ends up warming the FX's transformer via eddy currents and magnetization losses....
by jnh
Sun May 10, 2020 3:01 am
Forum: FLEXmax Charge Controllers
Topic: Array 1920w or 2500w for FM80??
Replies: 28
Views: 2237

Re: Array 1920w or 2500w for FM80??

Please share photos of your Frankenstein creation when it's complete :smile: After changing out the breaker to 70A as planned, I decided to put the ugly-but-functional 120mm auxiliary fan back on my FM-60, in place of its wiring compartment cover (easy enough to change back), hoping to extend the li...
by jnh
Fri May 08, 2020 11:47 pm
Forum: FLEXnet DC
Topic: Parallel Hookup to Flexnet Shunt?
Replies: 23
Views: 3106

Re: Parallel Hookup to Flexnet Shunt?

Alas, the Mr. Fusion will have to wait. Knew I should have gone with 48 volts... :grin:
by jnh
Fri May 08, 2020 11:33 pm
Forum: FLEXnet DC
Topic: Parallel Hookup to Flexnet Shunt?
Replies: 23
Views: 3106

Re: Parallel Hookup to Flexnet Shunt?

Nice analysis, and great treatise on "reduce, reuse, recycle" for twisted pair. 😀 Did copper go up to like a million dollars a pound while I was sleeping? For the time and effort, would it not be easier to run two cables? 😉 I have have plenty of spare cable spooled up, but it's more wanting to avoi...
by jnh
Fri May 08, 2020 9:17 pm
Forum: FLEXnet DC
Topic: Parallel Hookup to Flexnet Shunt?
Replies: 23
Views: 3106

Re: Parallel Hookup to Flexnet Shunt?

Less McGuyver and more rational may be to simply run a Cat5 cable 80' and relocate the Mate. It has all the info on its display. This would serve to keep an eye on SoC. If the system needed service in the equipment room using the Mate, it could be detached from the remote location and plugged in at...
by jnh
Fri May 08, 2020 6:08 pm
Forum: Mate3 / Mate3s
Topic: Dual Mate on a sysyem
Replies: 10
Views: 1539

Re: Dual Mate on a sysyem

It'd be interesting if someone with a Hub10 could probe its "2nd Mate" port with a scope, pins 3 & 6 (measured to pin-2 ground) to see if any data is being sent out on that port at all, which would determine whether a future Mate update could be enough to allow connecting one there, or the Hub would...
by jnh
Fri May 08, 2020 5:47 pm
Forum: Off Grid Applications
Topic: VFXR efficiency at very low loading
Replies: 28
Views: 3047

Re: VFXR efficiency at very low loading

As for circulating reactive-power currents being able to return to the battery, my understanding is that Outback inverters (as well as most competitors) do have a bidirectional topology that supports this - otherwise, it would not be possible for an AC-Coupled system to charge batteries from a micro...
by jnh
Fri May 08, 2020 5:33 pm
Forum: Off Grid Applications
Topic: VFXR efficiency at very low loading
Replies: 28
Views: 3047

Re: VFXR efficiency at very low loading

Provo, did you measure the 55W AC average by dividing total kWh recorded on your Kill-a-Watt by the measurement interval, or my extrapolating from instantaneous wattage readings? In the latter case, I wonder if the fridge could have run an undetected defrost cycle during that period. Efficiency is d...
by jnh
Wed May 06, 2020 10:58 pm
Forum: Off Grid Applications
Topic: VFXR Inverters Remote on/off Function
Replies: 11
Views: 2023

Re: VFXR Inverters Remote on/off Function

Don't forget to remove the jumpers inside your VFXRs' wiring compartments if you intend to use the remote power on/off terminals; this is connected in parallel and will keep the inverter always-on regardless of the remote terminal state. I'm not sure whether it's acceptable to tie remote on/off pins...
by jnh
Wed May 06, 2020 10:42 pm
Forum: FLEXmax Charge Controllers
Topic: FlexMax 80 suddenly showing O-amps?
Replies: 5
Views: 778

Re: FlexMax 80 suddenly showing O-amps?

Do you have any other active charging source other than PV, like maybe a wind turbine? Or an external battery-charger running from the grid that may be running when it shouldn't? "Charged" basically means the FM80 believes some other source is holding the battery voltage at or above the setpoint it ...
by jnh
Tue May 05, 2020 8:32 pm
Forum: OpticsRE
Topic: strange current from battery
Replies: 10
Views: 1974

Re: strange current from battery

Speaking of "phantom" loads, the normal grid draw for a Skybox at idle is about 150 watts. Seems like we're going in the wrong direction. :sad: It's hard to conceive of the sequence of engineering decisions that could have resulted in such a high idle load. Maybe just the result of a rushed develop...
by jnh
Tue May 05, 2020 8:29 pm
Forum: FLEXnet DC
Topic: cool hack for FNDC
Replies: 25
Views: 4220

Re: cool hack for FNDC

No doubt, the higher the W/sf the greater the efficiency, all things being equal. I thought the Astropower panels were pretty cool technology when I bought them. Optimized for hotter climates, perfect for Arizona. But these CSUNs are more forgiving of partial shading and have even better temperatur...
by jnh
Tue May 05, 2020 8:16 pm
Forum: OutBack
Topic: Possible Mate software bug?
Replies: 2
Views: 1584

Re: Possible Mate software bug?

Yeah, thinking on this more afterwards, it occurred to me that serial-output stream quirks couldn't really have anything to do with the apparent settings-duplication bug. Unplugging the hub connection of any device being polled results in a Communications Error being displayed on the Mate, if I reme...
by jnh
Sun May 03, 2020 3:51 pm
Forum: OpticsRE
Topic: strange current from battery
Replies: 10
Views: 1974

Re: strange current from battery

Powering itself from the grid would be much less efficient, because this would require the inverter to keep its main transformer connected to the AC line, and due to its large size that transformer would draw significant standby power itself (core magnetization & eddy-current losses), almost certain...
by jnh
Sun May 03, 2020 3:37 pm
Forum: Mate3 / Mate3s
Topic: Mate3s Manual or Documentation
Replies: 13
Views: 2286

Re: Mate3s Manual or Documentation

Just a word of warning -- whatever you do, don't accidentally change an inverter's "STACK" setting, as I recently did... one errant keypress resulted in instant loss of power, with no confirmation or warning, followed by repeated Communication Errors on the Mate that made it difficult to change that...