BigBattery ETHOS -- What do you guys think?

[JUMPSTART]

Beginner - LOOKING FOR PLUG & PLAY / INCREASE LATER .... Just would like to invest in something decent. - Was thinking about the Walrus (because funds are low) (but also see they are older batt tech / recalled but safe Jeep batts, heavy, only expansion is another unit...as if I need any more than that.)
I guess I would take out a loan at this point (but still don't wish more than 5 grand).... One problem with the Walrus is that it only PV inputs 230V and thats a little low for future. My future would only consist of 8 485W Panels (or 4 more)
Off Grid Mainly (but it does seem cool to manage grid / off grid... without having to manually switch and run into dangers of running out) but with the ability to upgrade to that. Kinda like the plug and play idea and looking for emergency power. Again, I guess it would be nice to save some $ (run things off peak, switch over auto "if" and tie into grid.... but I don't wish "their" hassles)

Presently I am getting by (emergency only) with the Oupes Mega 3 - 3,000W / 3,000 Wh / 120V... MTS ... 4 Panels 54 VOC ea. (must be 2S2P as Oupes only allows 150V PV Input) ...Would probably ground mount 4 more panels then call it quits. Presently 54V X 4 = 216 VDC Panels in series (Doubled to 432 in series if chosen to?) ... I am running a single run #4 AWG (85 Amps) 200 ft max,... probably 150ft now as I moved closer. === Naturally, it's time to step up to 240V

BigBattery 48V ETHOS 10.2KWH (2 Module)

The BigBattery 48V ETHOS 10.2kWh (2 Module) System delivers high-capacity energy storage with durable performance, perfect for solar setups, off-grid living, and reliable backup power.

signaturesolar.com

PS: I am not seeing any Inverter Specs? ...Because there is none? (MPPT Specs? / PV Input? ... I did see about 600V PV in an advertisement ...Guess I'm looking into it more. === Still just wondering if this is a good brand to build with.

Yes,... I see I need an additional Inverter.

LOL! ... At this point you guys might be like: "The heck with this guy as he's too poor"...lol. I see something like the EG-4 18kPV Inverter runs about $5,000. .....Perhaps there is a lesser inverter or one compatible. (4,500W W Heater / 11 k Range (one burner or oven probably 5K) / 2,000W Window Air 240V / (( Probably 2,000W Other small loads max... Fridge, chest freezers, furnace, coffee)) --- EST 7KW Minimum.

I guess my goal is decent plug n play / 240V Split .... I don't wish to play with EcoFlow etc ...as they offer no real PV Input. (shooting for 500V)

I do see one can do the lesser 12kPV 8K Inverter $3,500 / 18kPV 12K Inverter $4,850 ($1,350 difference or less) (both offer 600V PV Input (25A)

 

[42OhmsPA]

Hi PA neighbor.

That seems quite expensive for the capacity.

I would get all your loads figured out before buying anything.
Do you have any surge loads (well pump, compressors, etc)? What will the peak sustained loads be?

Lots of "cheap" reliable equipment out there... 5k is definitely doable for a setup that could power a fair amount of stuff if you're doing the work yourself.

 

[JUMPSTART]

(no well pump) Surge Loads would only be 240V Window AC Compressor (110V big side by side refer and 2 chest freezers,...furnace motor did draw about 600W then laxed)... Little whimpy Oupes Mega 3 3,000W / 7,000 Surge had no problem with those 110 V loads. ==== But you're absolutely right. AC gives me no info but search:
Frigidaire (non inverter style) Mod# FHWC253WB2 (25,000 BTU) 240V approx 2,430 W Run / 4,800-7,300 W Surge (or 2-3 times run wattage)...
AI search did not know much more === BUT... Looks like I should consider the 18k Inverter (12k offered 8,000W continuous?).... Hold on as now search is telling me both the 12kPV & 18kPV Inverters offer the same 12,000 W however the 18k avails higher PV ...Which also says the same for the lesser model...lol? ////// Nontheless: Looks like I better do 12K if I dont feel like turning stuff off all the time.
OK - UPDATE - 12kPv (8,000 W Continuous / 12,000 Surge == 18kPV (12,000 W Continuous / 15,500 Surge)
.... Question now is if I can live? with 8,000 W Continuous. (for about $1,400 less) ... I doubt I'd exceed the 12,000 W Surge

 

[JUMPSTART]

Hi PA neighbor.

That seems quite expensive for the capacity.

I would get all your loads figured out before buying anything.
Do you have any surge loads (well pump, compressors, etc)? What will the peak sustained loads be?

Lots of "cheap" reliable equipment out there... 5k is definitely doable for a setup that could power a fair amount of stuff if you're doing the work yourself.

 

[42OhmsPA]

(no well pump) Surge Loads would only be 240V Window AC Compressor

I would pick up a clamp meter capable of reading inrush current, if you don't already have one, and figure out what that pulls on startup; I think you'll be surprised.

(110V big side by side refer and 2 chest freezers,...furnace motor did draw about 600W then laxed)... Little whimpy Oupes Mega 3 3,000W / 7,000 Surge had no problem with those 110 V loads. ==== But you're absolutely right.

You may find my parallel journey thread very useful, also check out Doc Zwys latest build on YouTube and Will's 10kW recent video. Solid AIO for a great price.

 

[JUMPSTART]

I would pick up a clamp meter capable of reading inrush current, if you don't already have one, and figure out what that pulls on startup; I think you'll be surprised.

You may find my parallel journey thread very useful, also check out Doc Zwys latest build on YouTube and Will's 10kW recent video. Solid AIO for a great price.

Yes... Clamp Meter... I could split the cord or at the box (have a friend turn on)..... If I had any friends after this
.... Will try to look up your links. Thanks!

 

[samlhop]

I have Big Battery Ethos 15Kw set upas a hole home backup system for 11 months . and at least once a month the system drops communication and shuts down. OVER 14 FAILYERS INLESS THAN A YEAR.
hear is the event log:

thats 14 fails, when i report the problem its no help jest references to the manuals and they will look into it with an occasional fallow up email asking if the problem is still ongoing. I is the battery and the inverter are not communicating correctly.
Ethos gets its TIME for ether the inverter or the communication protocol and the inverter and the battery don't agree on time.
the lux support is good all i can say about Big Battery is there battery's look nice.
over 60 emails with there tech support and numerus calls NO JOY.