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Yes, monitoring Growatt amps vs. Warpverter Volts and Warpverter Hz is a good test. 1) RTFM 2) Go through the configuration choices of Growatt. (i.e. read the setup data.) People sometimes set the wrong country code and it has different limits from what's needed. Like Japan 100V vs. US 120V...

If that is Volts-Watts, it keeps AC within regulation. But you still want to avoid over-charging battery. Unlike my Sunny island, your Warpverter will take everything Growatt delivers and stuff it in the battery. How about a battery high-voltage signal to a relay to disconnect Growatt...

If you can store them somewhere, just keep all. Got a different orientation available? A wall of the house? How about 5s2p array, two strings of different orientations?

I think you're going to get AC voltage drop with load and rise if backfeeding to charge battery. Feed-forward regulation means it doesn't correct for that, but within some tolerances (IR drop) it will be OK. Does your Growatt throttle, or just drop offline? Some settings might knock it offline...

Grounding the panels (their frames) isn't to protect them from lightning, it is to protect you from shocks. Run a wire from the frames back to inverter chassis. That ground wire should tie in to all other grounds in your house. And all pipes. Don't want voltage between the faucet and the...

Frequency shift may emulate what a rotating generator does under light vs. heavy load. It spins up higher with less load. Sunny Island battery inverter emulates that (but only above nominal frequency.) Also, an induction motor used as generator, if driven at a fixed RPM, would deliver more...

Dump load (or DC shunt regulator) would be one way. Available for wind, so an off-the-shelf solution. If Growatt does frequency-watts, then Warpverter increasing frequency would tell Growatt to reduce wattage output. That is a newer grid-tie standard here in the US, part of California's...

Sunny Island 8.0H puts out 5kW up to 50 degrees C. https://files.sma.de/downloads/SI44M-80H-13-DS-en-31.pdf You would pair that with one or two Sunny Boys, which work up to 60 degrees C. https://files.sma.de/downloads/SB30-60-DS-en-61.pdf Or you can DC couple with SCC.

My N-G bond is at the first main breaker, so separate wires for everything after that. Inverter doesn't switch N, just passes through. Maybe your generator bonds N to G, and transfer switch switches N? I'd be inclined to modify it in that case. Will your inverter have separate generator input...

You do have a meter followed by main breaker only, like mine. Is the box on the right breaker panel, or transfer switch? For extended outages, I'd think you would want generator to feed inverter on-demand. Or, feed a ChargeVerter. Transfer switch may be whole-house, but you might rather have...

That should do it. And I hope a triple is more economical!

Quoted from an ad for a competing chemistry. What is "Hard"? Well in excess of spec? We expect LiFePO4 to tolerate 0.5C charge, 1C discharge, while kept at comfortable temperature. Isn't that the rate at which 6000 cycle life has been tested? That would be 3 hours per cycle, 8 cycles per day...

Load shed and priority switching would extend what the inverter can power. Same for the grid itself! A Miele Washer & Dryer pair had water heating, and power daisy chained in a manner that it only heated one or the other, so single outlet sufficient. Lots of appliances would lose their...

When people with 10 year warranties on their cheap imported equipment need to get online to see if the warranty is still honored, they will visit someone with an ancient Trace, Outback, or Midnight Rosie system, far out of its 5 year warranty, because their power is still on. Here's my...

I picked up a 48V server rack fan, which runs happily on reduced voltage. I mounted it in the gable and wired two 12V PV panels in series, plus a switch. It vents the attic when sun falls on the panels. Don't actually know the impact on temperature. I figure exhaust air from PCs and a fan to...

Or DDS. Or just a digital value fed into a counter. Not making a sine wave, just a clock with variable timing to step through the ROM which does make the sine wave. But analog control loop to analog oscillator is appealing.

I think the fire is below the temperature which melts steel, but the volume of flammable gasses would fill the container and escape into the room. Gasketed and vented outside could help.

Because you're the assembler, not the manufacturer. I got to recommend approval for not using Mil Spec floor wax, instead testing purity of non-mil-spec carnauba paste wax. The pins were dipped in that as part of the manufacturing process. That was a lubricant to reduce wear, not something to...

Sounds like he is more closely involved with them, if there is an NDA (unless it was a settlement.) In which case, the responsiveness he sees is not representative of what the average customer can expect.

Thin film panels are noted for degrading faster than crystalline. Don't know about these "foil" ones, but you'd better assume the same. Some conventional panels also degrade rapidly. There is a lot of technology involved, so brands/models with good track record are the best bet. Accelerated...

So adjust torque accordingly. https://www.engineeringtoolbox.com/torque-lubrication-effects-d_1693.html Break a bolt, and you join the ranks of the pros we entrust our lives to...

I don't believe a Semiconductor fuse is a circuit made from semiconductors. Just fast fuse material. https://www.electricity-magnetism.org/semiconductor-fuse/...

OK, so no claim that 12V or whatever can jump 1/8". That was the original disagreement we were discussing - whether a screwdriver could draw an arc from a 12V car battery without having ever come in contact. Guilty as charged. But my welder is an AC buzz box, a 3:1 step-down transformer with...

Is the Growatt AC coupled to Warpverter? Were loads in excess of what Growatt put out, so Warpverter simply reduced its own output? Or have you implemented frequency shift to regulate Growatt output? Or, although Growatt exceeds loads, it simply backfed through Warpverter charging batteries...

How many watts of PCs? They produce somewhat higher grade heat. Rather than blending with room air and then cooling with A/C, how about discharging through a vent to outside? Would the replacement air drawn in be humid? Pass through an air/air heat exchanger and return the not so hot air...

If this is an offgrid system, then what you describe is exactly the way to do it: Inverter "Load" terminals feed breaker panel. If grid feeds breaker panel, then connect "Grid" terminals to breaker panel as others have said. The inverter can backfeed to the grid, or limit its output to what...

I think breakers age with hours of operation at high current. I've had some trip below rating. But if it has had an easy life, may not be a problem. You could test it! Got 3x 15A space heaters? hook them up to run off one leg, see if it holds a very long time. I made a breaker tester with a...

"He never actually touches the other post and then he draws the arc" I don't buy the part about it jumping an airgap to initiate the arc either. Higher voltage needed to ionize air and make a spark. Once you've got an arc, then you can pull it. (But I'm not good under 125A on my 80Vrms buzz box.)

Why should he have to do that?! Couldn't his vendor from Signature Solar walk down the hall, without even leaving the building at 1130 Como St Sulphur Springs, TX 75482 walk into the EG4 office, and get the part he needs...

Just cut and splice the damaged part. Evacuate the line before use. That may mean splice with a Tee and valve.

40A at 240V is ~10kW. But only run 80% continuous, so 32A, 8kW draw or backfeed. If it will be backfeeding, use or relocate to end of busbar. 120% rule: 200A busbar x 120% = 240A, 240A - 200A main (or feed) = 40A backfed PV breaker allowed. Your 18kPV can supply more than 32A. Just configure...

Or, call the "Combiner Box" a "Critical Loads Panel". Add a load-shed relay before the Main Panel. I think it is best to have 2 levels of load shed. Critical loads like communications are always on. Important loads like refrigeration and lighting are on down to maybe 20% SoC. Heavy loads like...

The Reliance transfer switch only switches L, or L1/L2 for 240V loads. It leaves N connected in the original panel. See if you can repurpose a 2-pole transfer switch in the Reliance for L/N of the AFCI and/or GFCI breakers.

What, Me sound like? If multiple strings are in parallel, can one bad one get cooked and vent, without fuses blowing to isolate it? I suggest isolating bad string of cells in the event problems are detected. Contactor or shunt-trip breaker, under control of BMS.

Do you need full length of the line? Could cut off and just use half. Or splice with a Tee. There are vacuum pumps available, I paid a bit under $200 for 2-stage from Harbor Freight. And maybe $50 for manifold gauge set. Or maybe an HVAC guy could do it for you, carry-in. Slip some bucks to a...