Recent content by Hedges

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...