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I think a hybrid with about 5kWh to 20 kWh of battery would do a great deal to "green", if by green we mean minimize the fossil fuel use and and CO2 release. Of course, that is the exact opposite of greening the planet, which was far more green before the plants destroyed their environment and...

I don't think Will is playing in those circles. Yet. Kind of like comparing my classic car collection to Jay Leno's. https://cryptobriefing.com/argo-estimates-2b-cost-for-texas-crypto-mining-facility/

Two ways I know of to use all available PV and supplement with grid power as needed. 1) Convert grid AC to battery DC, and invert from battery when PV is insufficient. 2) Synchronize inverter to grid, and invert from PV and/or battery, adding power to AC wires but avoiding backfeed (or allowing...

I suggest you use a bicycle pump to inflate that suit, to increase spacing between Faraday cage and subject being protected. Faraday cage is actually not as effective within a couple wavelengths. (Or use helium, to further amuse bystanders. Or nitrous, for the amusement of the subject.)...

Victron and Schneider are both good stuff. You started out mentioning components, separate MPPT and inverter. What loads do you need to power? Any big motors (which are difficult to start)? How much power daytime, how much night time, and how many months/years to you expect to use it? How many...

Rat-array contender, 2x AstroPower AP120 panels on a steel easel. They power gable fan, and used to power Pabst fans laid on heatsinks of inverters: Before I used scrap electrical wire to tie it to fence stakes, it blew over and broke the gas meter. Not the gas regulator, just the mechanical...

What PV panel model and quantity? What inverter and quantity? Tesla may consider local weather. Some web sites I think do, but not others. Do you tell PVWatts the PV panel model number, or wattage? STC watts rating of a panel differs from NOCT or PTC rating. The ratio of (ideal conditions, 1...

It would be bad for the batteries to receive continued charge current after 100% full, voltage would go too high, the cells would bulge, then vent. If you put a match to the gas it would burn. The voltage regulator in MPPT charge controller avoids that, and battery BMS is a last line of...

Also look at PV panel wattage rating (STC, usually doesn't produce that much, see if NOCT or PTC figures available on data sheet.) Look at inverter wattage rating. It is reasonable to over-panel, excess PV wattage compared to inverter wattage, to keep power up off-season as well as earlier and...

But I think in one direction, current is much lower. Whatever charger can deliver. 100A per 5kW. Only in the discharge direction will it be 1kA or 10kA, so only one polarity of voltage spike is so massive. I think that polarity can be clamped with diode to opposite rail. The smaller kick when...

They're meant to do that. 60 Hz < 100 kHz. Of course there will be harmonics of 60 Hz, not a pure sine wave plus non-linearities in things. Yes, but you should calculate skin depth ... in human skin and tissue. EM waves coming from far will be highly attenuated with depth in the body. But...

For trusted brands, check out Blue Sea. https://www.bluesea.com/products/category/11/37/Manual_Battery_Switches/m-Series For your relatively low 50A, it is more likely you can get away with almost anything. But when we see wire lug landing on top of a nut, so current goes through the nut...

You can use any color you want, so long as it is black? And has phasing tape? I was wondering if you would make it back. You said something about testing a repair that needed to work for it to be able to land. I would have wanted to figure out a way to test that before getting up in the air.

L1 and L2 wouldn't cancel to the extent they carry different current, and N is carrying that. L1 out and L1 back from switch would cancel. For a transfer switch, you'd want all three L1 wires in a single conduit. The three L2 could all be in a different conduit from L1, at least from an...

The question is cell voltages. We've seen lots of bloated cells because someone charged in series without a BMS. But you've got a BMS. Is your BMS capable of disconnecting cells from charger? What highest cell voltages did it record? "JK Active balancing normal." While I've never worked with...

Mechanically, that doesn't have the double bolt. Which would matter mostly to prevent rotation and loosening of bolt, not a problem between cells with these busbars. Polarity is consistent with the others The odd thing is no voltage issue reported by BMS. Over/under charge could affect a cell...

A reactive target? https://en.wikipedia.org/wiki/Metcalf_sniper_attack

The busbars had a shape maybe for compliance, but last one was stretched straight! A couple cells have top plastic peeled - heat? Last one on right looks dented on corners, including bottom. Was that present earlier, or did it happen after failure developed? Possibly, strap and U-channel...

I don't think cloud edge effects do much to Voc. Temperature is important. I might use 16% (-15 degrees C, -0.4% per degree C deviation from +25C) for very conservative without any more math, but temperature coefficient from PV panel data sheet and record cold temperature for your location lets...

~ 72 HP worth of braking? What kind of hills do you have? Or was that brief peaks while rapidly decelerating?

Or is that one polarity on one switch side, one polarity on the other? I would think inductance and stored energy in cable coming from cells is under your control and more limited. Routing of negative cable could reduce loop area (even trace back along busbars to positive terminal. Depending on...

Clamp wire on which side of FET? Is this a wire from BMS positive terminal, driving load? In that case, when FET opens I think inductance of wire causes voltage to fly negative. In that case, just use a (fast) diode to clamp it to battery negative. Same circuit as a buck converter. i.e. take a...

I think if you open neutral you need to trip the 100A breaker to prevent lost neutral. Maybe you can tap into the trip circuit. The center tap should be able to handle ~ 30A, with each of the L1, L2 connections handling ~ 15A. I think Victron's thermal protection is sufficient unless source...

Check if the stacked pair always puts out steady 240V. If so, seems like neutral connection between them is good, but to load is not. However, I don't understand why load on one leg acts fine but not the other. Are there also 240V loads present? Lost neutral can then cause brownout and...

Unless it needs to operate in a "strategic" environment, where neutron flux will alter doping and cause serious divergence in your carefully matched threshold voltages. ;) But then you'd also have problems like shoot through when everything turns on for a while. RTL, Resistor-transistor logic...

I may have thought at one point the third pole was a 28A breaker for neutral, but it is a shunt trip which throws the 32A or 100A breaker. It would be possible to have a current sensor (implement electronic circuit breaker) in which case we would want to know the overload/trip characteristics...

Then I stand by my math that 28A (continuous) is all you've got. Try loading it with approximately 5400W, 45A on just one phase. That's half way between 28A and 7360W/120V = 61A I think it'll trip. Looking at Victron's auto-transformer schematic (back when we were picking apart a different...

My math says 4000W / 120V = 33A continuous imbalance you could have supported if you connected neutral between the two inverters to loads. Instead, you use the autotransformer, so you can only support 28A continuous. However, I think the combined surge rating of both inverters will be...

I order and pay for lunch at work using my cell phone. Although they also have kiosks with displays, I almost never use them. Who needs a working display at the "pump"? (If they do this. But what I will NOT do is let them pull money directly from my bank account to save a few cents/gallon.) A...

And what is the inverter power rating? Now divided that by voltage and express in amps.

Clamp ammeter. Or current transformer connected to DMM. The ones I've got have a resistor internally and output something like 0.333V at 100A. What does the auto-transformer accomplish, that you wouldn't get just by using the neutral between the two inverters?

Do they have the feature of sleeping the ones not needed for loads applied at the moment? Some 🌞 do (with standby load 15% a much)

If connected to grid or other source with N-G bond, I'd want to pass that neutral through to load. No need for autotransformer while passing power through. With no external source, unbond at inverter and use auto-transformer to derive a neutral would be fine. But if inverters are stacked for...

Extracted from layout, it could divulge far too much about process, helping competitors reverse-engineer.

Is that two Multiplus at 120V each in series, neutral doesn't go anywhere except each other? If so, their current into AT has to be identical, and wattage will be same to the extent voltage output is same. AT has no ability to affect that. 4827W / 120V = 40A, hope that is at least distributed...