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How about switch to grid and charge from grid when it hits 10%, disconnect from grid above 15%? (or some other numbers.) Same difference, except it cycles.

"SBU" or other modes? https://diysolarforum.com/threads/how-do-i-force-deye-12kw-hybrid-inverter-to-work-in-sbu-mode.83977/ https://diysolarforum.com/threads/snre-sbu.71899/

That is an actual Pelton wheel (in plastic). It has one nozzle, could be fitted with more. When you redo you system larger, consider bronze. Check out the chart giving head loss per 100' of pipe, vs. water flow and pipe diameter...

It may be that design of the mini-split frequently changes to fit the latest cheapest available parts, in this case size and fittings of lines. (Which of course means line size isn't optimized.) Auto industry expects parts to be replaced and does configuration control. Still, I eventually...

One California contractor (who I bought some surplus PV hardware from) stopped doing PV work because every city had different rules. Too much effort for what the business was worth. If enough cities relinquish authority to SolarAPP+, it would be simplified (Federal on-line design entry to...

Transformer. Is output 1 phase or 3 phase? Variable taps or variac would let you adjust load. Oh, rectifier? Tap in before that. There are 150V, 200V, 250V Midnight Classics. Yours is a bit above that. Sunny Boy 5000US series, has turbine mode, makes AC. Either of those is multiple kW. Any...

I swear, that looks like the impeller for a vacuum cleaner. Suspect it is much lower efficiency than one actually designed for hydro. The toothed pully is also a sign of something repurposed. First order of business is determining flow x pressure representing max power delivered, as Russ is...

Hmm, a few things Midnight sells direct, but in quantity. Like surge arrestors by the dozen. Current Connected and Stella Volta are a couple resellers. I found Stella Volta through their eBay listings. I also Google part numbers together with the word "price"...

Unless a toothed washer is used. We specify that for anodized aluminum. Would work for paint too. You'd never want such a washer in current-carrying path, but it helps for safety ground path.

Maybe the Winston's are twice as likely to last. Just like PV panels, as cells drop in price so other system components dominate cost, saving money has diminishing returns.

Most small devices, including handheld radios, survived simulated EMP. Some radios were damaged. I don't have the details, might be voltage whip antennas vs. current loop. Automobiles typically stalled. Only one out of many required repair (ECU). PV system connected to the grid will be at...

CBI and Carling seem to be more difficult to find retail, except those relabeled by Midnight. This might be what you're looking for. Note that it is polarized, can't be relied on to interrupt higher currents at full voltage in reverse direction...

The documents under your Chint link don't say what type. Wire and connection resistance causing heating that affects thermal breakers. These Midnight units are UL 1077 Supplementary Protectors https://www.midnitesolar.com/productPhoto.php?product_ID=191&productCat_ID=16&sortOrder=9&act=p...

Yes, working. Actually unused e-waste. No thread yet, couple of posts under someone else's thread with SBS issues. OP's is "Prime", supports multiple inverter types. Mine is "Type-C" for Sunny Boy Storage. I'm working through SBS updates and issues with SBS not always doing what it's told. No...

Specs will say what type breaker, and what trip curve which you can then find in additional manufacturer documentation. The Square-D ones I use are thermal-magnetic. Midnight/CBI and Midnight/Carling are magnetic-hydraulic. Ripple Factor is my contribution to the art (that label may have been...

Check the Hazard Fraught Price Tracker https://hfpricetracker.com/tools/70143 That sounds like a bit lower than previous sales. https://go.harborfreight.com/coupons/2024/04/182939-70143/ Note that customer-facing website is often incorrect. May show 1 in stock but it is the floor model and...

And ground. And communications, including jumper for terminating resistor. As detailed in the manual Sunshine linked.

Were calculations provided? I'm imagining an incredible splitting force on the concrete when that long lever gets pushed by wind. This isn't my field, I could attempt calculations, but my first impression is pretty high force generated.

Interesting how the I-beams are set in about 1' or whatever of concrete. Most installations, I think they would go down several feet. For this it is the concrete on surface as ballast. But I'm curious what the calculations look like, to hold the steel in the concrete against torsion forces...

Look for something like this, make sure it is for your specific model. The link for this one is gone, so search around.

Because RS485 is differential, it has a pretty good chance of working without a proper ground routed together with data. Different devices could be floating at a voltage where data gets through (bumped back into line by ESD clamping at the rails), or could be grounded through other structures &...

"We added one 30 amp, one 50 amp and one 60 amp circuit complete with breakers and programmable relays. This is actually six 120VAC or three 120/240VAC circuits or a combination of both depending on how they get configured on-site. It is up to you and your installer to decide what circuits to...

While we do admire your creativity and resourcefulness, we would like to see a UL listed sliding interlock mounted on the breaker panel bezel. After all, they way you've done it does make access to add circuits difficult.

And those who think "CMOS" is a type of firmware.

"SpaceX's view of risks and willingness to accept risk is considerably different than NASA's." https://www.msn.com/en-us/news/technology/nasa-emails-show-growing-concerns-about-spacex-plan-to-save-hubble-telescope/ar-BB1mzg1A?ocid=entnewsntp&cvid=470a4c6d47fd4d3b9a197b82755f939d&ei=53 Is that...

Midnight's "The One" will be a similar wattage inverter. Given their reputation it is eagerly anticipated. Current Connected will be carrying that, as already received one and torn it down. What you need it to do is first order of business. Surge to start motors, etc. There are HF all in ones...

Go to Current Connected. They will charge you an additional 3rd-party fee for shipping insurance. Because in their experience, the carriers don't honor their own shipping insurance. But the 3rd party does. See what people on the forum have to say about Current Connected and owner✔️ (CTO)...

You can put in a separate single phase or 3-phase backup system, hybrid or off-grid, configured to not backfeed. It would not use your existing PV panels. You can put in a 3-phase battery inverter which will AC couple with your existing grid-tied inverter, making your only local grid. This...

Surges fall within the time/current curve of fuse or breaker. No need to oversize for surge. What is efficiency of inverter at full load? I'll assume 90% What is low-voltage cutout? I'll assume 48V 1200W / 48V / 90% = 27.8A Is circuit breaker thermal/magnetic (subject to nuisance trips) not...

Ahh, but MODIFYING the firmware, reflashing it, performing regression testing, tracking revisions ...

Yup, I got sick and tired of those safe, anti-spill plastic gas cans that always spill gas on my hands and shoes, as I try to press against fill nozzle or hold back collar. Went looking for stainless, settled on that (galvanized?) steel can. List $100, found it for $70. Tilt then pull bail to...

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His current measurement is in line with yours, and 45W is a reasonable no-load power. That 0.08 PF could be correct. Now the question is, under what conditions is power factor > 0.99? I would have expected higher no-load power factor from a device with such a figure quoted, because it would be...

Actually, I just listed a kWh/year figure that that was all that was needed. In my 200A service upgrade request I initially tabulated electric heat, water heater, dryer to justify my PV. But upon learning I didn't have those loads yet, they approved service upgrade without them doing anything...