Great test of your system!

I have a similar Sigineer 6kw inverter (3kw/phase), though 24 vdc system, because that was what was available a few years ago (and yes, I would have preferred a 48v unit, but it wasn't available at the time). I run a small off grid panel setup on my shop roof (4500 watts nameplate rating at STP, 3500+ watts actual MPPT output around 11:30 a.m. to 1:30 p.m. through the 6kw inverter. I use the inverter to power dual 1500w space heaters on cold days (and yes, they keep the whole house around 73°F, or several large AC units in the summer without any trouble (the system produced 22.2 kWh a few days ago). Due to the high parasitic draw at night of the unit (~200 watts including the WiFi bridge and power meters), I installed a cheap programmable digital timer from Amazon (with a 150-ohm resister in series with the 24-29.4 v batteries to reduce overvoltage issues) to shut off the inverter about 45 minutes before sunset (the output relay opens or shorts the shut-off contacts in the remote display unit). This allows the batteries to top off before nightfall most days. This lets me go through the night around full charge, allowing essentially full power after the sun has been up a hour or two and extending the life of my FLA batteries (12 x 100Ah) since they stay a long ways from 50% SOC. On milder days when running the heaters isn't appropriate, I use the system to power my entire house (less the high draw water heater, and dual HVAC units) and it does fine with the 1100-1500 watt nominal continuous power draw. It can easily handle the higher short term loads of a microwave, dishwasher, toaster oven, small burner on the stove when done separately (not simultaneously). I built the system for emergencies (for about $9k), but might as well get some financial benefit from using it, as electricity costs have nearly double from 2 years ago. I'm hoping to expand the system, and add some rooftop panels in the not-too-distant future.

really good stuff man! glad i found your channel! keep going!

Good to see its holding up....i was told paralleling bms's like this would result in "problems"....happy to see they were wrong

just came across the battery on battery hook up then searched videos on youtube and came across your tear down and setup... honestly pretty cool... just sad its 7s per module and not 8s... feels like for most inverter chargers this is going to cause issues as you found with yours, as one of the greatest benefits of 4s LiFePO4 is the closeness to 12V lead systems. Anyhow my desired use case is nearly the same.... starting with non-solar battery to act as a backup for critical loads in place of a generator for relatively short grid-down scenarios.... while up-time on electricity is good here in the city... still have had several thunderstorms knock out power for 4-6 hours.... which couple of kWh would be ideal. And hopefully something I could move with me to further projects. Still awesome to see your setup.

3 years later, do you still have this inverter?

Do you think the power use of the inverter is high? I would like to see comparisons on the internet.

3.2 volt per cell will help to longer life span of these battery and you can also use some hybrid inverter which is 97% efficient

hi, nice video. When calculating your battery capacity, did you take the efficiency of the inverter into account ? I have an LV5048 all-in-one and it's measured efficiency is 91% with a continuous load of 70W.

wait early in the video you said the battery was within .001, at the end of discharge the batt is out of balance

Inspirational 👍What's the next project or area of improvement? Is it possible to elongate the life of the system? Would it be possible to reduce the parasitic load by incorporating a smaller more efficient inverter in tandem connected to a load sensing ATS automatic transfer switch that will instantaneously switch between the different inverters when the load exceeds 100 Watts. Would it also make sense to create a equally balanced 96 volt lithium ion phosphate battery to power the smaller inverter reducing parasitic load increasing efficiency reducing amperage? 😉

I have the same inverter. I bought it because it was available and it seemed to work well for you and others online. I was wondering if you have an easy way to make sure it charges during the day while solar is available and discharges at about 4 or 5pm.

I don't take mine below 3.0 just not much sense to beat it to death for a few kwh 90% of the power seems to be from 3.4 - 3.0

These are good videos!! I am continually suprised by the parasitic draws on these cheaper inverters. You are basically wasting 10% of your battery pack and 10% of all the energy you ever put into it. Mind you some of the even cheaper inverters are much worse!