New no battery pure sine wave solar power system with smart switchers.

[GridWorks Green Solar]

Trying to figure out how the voltage is going up so fast with this transformer, Dual 117/234 VAC primary 60Hz.

Working smoothly so far, Just killed 5Amp fuse upping the amps, went to design 15Amps fuse.

Inverter wired C terminal to white and brown in the center A is on black and B is on orange,Red & Purple single coil output.

Very pleased with preliminary results

More soon ️

 

[jorby]

In the photo, the lights look to be different brightness. Is the voltage the same on them?

 

[GridWorks Green Solar]

In the photo, the lights look to be different brightness. Is the voltage the same on them?

I believe them to be of the same the same intensity only the closest bulb running off the transformer is much brighter, will test again to make sure the drives are balanced, driving a much higher load and melted the red positive test jumper, soldering iron made it up to temperature running larger lighting load.

Time to reconfigure for more amps, Can not run big amps through alligator clips

Once again the output is going to be limited in this configuration due to not being pure sine but doing one thing I really like gets more stable the more you work it.

More soon ️

 

[GridWorks Green Solar]

Going to draw a schematic from the current working version of the NN inverter triple check it and published with the next V4.3 update early next year. Will publish here as soon as it passes audit.

Have to back track on some testing think I may have interpreted a double positive result the wrong way.

More soon

 

[GridWorks Green Solar]

Going to test pulling max power from the NN inverter output directly with a diode bridge or similar this processed regulated DC power may be useful in some applications like lighting or battery charging.

Big deal to me to get maximum benefit from this inverter not nessassarily using a transformer, Using diode devices on A B C terminals to get maximum DC energy out will be a real win as long as the FETs are running the power will be regulated.

More soon ️

 

[GridWorks Green Solar]

NN V4.2 schematic nearing completion should be published here by days end.

Handy mate accessorie very DIY for the NN inverter, Two 40VA transformers paralleled with center tap inputs, LC built into power strip, around 60watts of 120VAC 60Hz power only pulls 4amps off 15Amp inverter, good for a soldering iron and lights for example. Output tester confirms the quality of everything.

Nice ️

 

[GridWorks Green Solar]

New schematic V4.2 NN inverter also cross checked against Gerber files

Any changes or improvements will be in the V4.3 release.

Running a 12.0 DC regulator on a trashed project board to power the 555timer 60Hz signal 12VDC input.

Initially test at 9-12VDC with scope and meters for basic operation, may have to lower or bypass the block resistors for 12-15VDC operation full time.

Second image computer generated from Gerber files sorry for popcorn screen.

Best wishes

 

[GridWorks Green Solar]

A couple days to solder in wires for higher amperage long term testing.

Still running strong just had to replace one alligator jumper.

The toroidal transformer is pulling 6 amps with a 10watt incandescent bulb
basically no load condition, Basically 9 amps remaining on the V4 to run additional loads once I upgrade the in and output wires to the board the lithium ion batteries I use can supply more than 15Amps, 15 Amps is maximum and I fully recommend 15Amp quick blow glass fuses on output for safety.

Have established a running 750 VA core at 6amps costing about double what I was hoping for in real power.

I totally love this inverter and will keep at it for a month or so more, But as a caring tech just use a Project pure sine and output ISO, The through put on the transformer is amazing with pure sine and totally worth the effort.

Only running at 48VDC instead of 140VDC is one reason the transformer is pulling more amps, at 120VAC operation, ohms law says the higher voltage would reduce the input to the transformer below 3 Amps.

Like the transformer very much but not not the one I wanted or thought was ordered.


More later️

 

[GridWorks Green Solar]

Have decided the new transformer after V4 testing will be used on the overhead lights and fans with 5 security cameras running off a project power board.

Solar powered by day, grid at night and best of all independent operation so no dimming the lights for fridge and mini split startups, Just high end look and operation with pure sine.️

More soon

 

[GridWorks Green Solar]

Transformer was tested at 4,000 volt isolation, Has several certifications, during wiring improvements I will test the different coils on the torridal for 117VAC input to 120VAC output if possible, have a feeling going to get 117volts in and 240volts out. More on this later.

Gate power indicators are working well, no gate power problems at 20VDC and above, Will be an optional addition to the V4.3 release still pushing to solar test even if it is independent A&B test or lower voltage and a transformer.

More soon ️

 

[GridWorks Green Solar]

More about the new transformer I purchased put the two paralleled 117VAC input coils on 115VAC grid power and the single output coil was at 230VAC just as I suspected it would.

The second test was to put the two 117 input coils in series the center tap created will not be used (230 VAC input 230VAC output ISO transformer ) next only feed the input to the transformer 115VAC any guess as to the output? (130VAC)

As in the photo example below the loaded system voltage is at 105VAC the 130VAC no load voltage will vanish the second you start loading the system.️

This transformer will be a perfect output ISO transformer for the Project power board system, 180VDC single feed to the inverter four FET power board 120VAC output to the ISO transformer and 130VAC 60Hz pure sine happy power to use anyway you want

Description of Happy power pure sine works with electronics and transformers well at the ISO transformer output you can connect a true ground and netural for things like car charging and mini splits.

This stuff really works, full solar heating in the living room frigid day outside but also blue sky day.

750VA for $160 these transformers can be combined for more amps output.

Last picture current project system display, overcast day if the top display was at 75 it would be 15Amps solar.

More soon ️

 

[GridWorks Green Solar]

Foward progress in soldering in appropriate wires for higher amperage and voltage on the NN inverter board ins/ outs and output transformer.

Everything fused at 15amps for the next batch of testing, headed for a high voltage solar test soon.

Not insulted yet also no more alligator test jumpers.

Using the orange adjustment transformer to slowly bring up the core torridal during testing also using it to temperature control the soldering iron even supplies 130volts in boost mode.

Modern transformers are so efficient magnetically they can wreck themselves highly recommended soft start on the ISOs, On the NN inverter V4 at startup it will require you to start the 60Hz signal first then close the Solar/DC/PV switch to the inverter the gate capacitors must charge before the FETs channel full power out this ramp up to 12VDC will provide a small amount of soft start, larger gate capacitors extend the delay time gates start opening at 6volts.

System shut down V4 inverter open PV/DC switch first after about 4 seconds turn off 60/50Hz signal power.

More long term NN testing ahead.️

 

[GridWorks Green Solar]

Last test ran both channels full on with only the board optic coupler safety resistors 800ohm cutting down the feed, will have to do a quality check on the output sine, it ran strong nothing went bang

Still gun shy from the P & N overlap $horts, good things happening.

 

[GridWorks Green Solar]

Have to push the limits on things to learn, B channel doesn't like being driven full force and needs regulated, know from previous long term testing 120K worked well.

B channel 15Amp diode was getting hot when the main 15Amp fuse on the inverter let go, honestly don't know where the 15Amps was going assume the B channel went full on DC and the ISO did what ISOs do and clamped the circuit.

A channel ran smoothly the whole time dose not make sense identical circuits except the three resistors voltage devider.

more testing ahead

 

[GridWorks Green Solar]

Message to self don't ever try that stupid stunt ever again, damaged gate on B FET and or optic coupler, Yes you can still over drive the NN inverter. Going to be forced to use a lesser quality 40N60 FETs (About 12 good used parts) till I get past this stage of testing, bought P FETs need 40N65 N FETs. Just my luck

More soon

 

[GridWorks Green Solar]

Found a 40N65 MOSFETs that test like new and installed, replaced cooked 15Amp diode. Unit is back operational but the big ISO is also pulling big amps to run little things, much more practical with the smaller transformers in this configuration.

Trick now to test other configurations and voltages without damaging to the NN V4 inverter. Even if it is independent A & B output still want to test the V4 NN at 140VDC single input solar.

Like I said before the new ISO is headed for an easy life running the overhead lights, fans and security camera circuit off a Project four FETs 40N65 pure sine power board.

Happy to have it running again.

More soon ️

 

[GridWorks Green Solar]

Raining today, Since the 750VA transformer is a mismatch in coil voltage for the NN inverter it is going to be gently tested for other configurations in a attempt to find the big power 15Amps available at the inverter output.

More than that going to find interesting ways to use that power.

More later.

 

[GridWorks Green Solar]

Looking at what will be running my overhead lights,fans and security cameras on solar by day and grid by night.

Yes the ISO transformer fits the case nicely and the lid will go on, Project system inverter board four FET and cooling fan will be solar-powered 180VDC single feed, output pure sine happy power.️

Rubber sheet under the transformer and plenty of ventilation.

Since the same light circuit load is just moving over to an independent inverter the input ISO transformer will power two systems at night instead of just the one.

Have another 15Amp rated diode bridge to easily share the 10amp transformer.

More soon

 

[GridWorks Green Solar]

Making forward progress on Project inverter board and new ISO transformer, just passed a bench test with 68VDC input to the project power board, 12VDC to the DY002-2 signal timer.

Amazing difference less than 1Amp to run pure sine on the same core transformer VS 6amps off the NN inverter 60Hz but not pure sine.

With resistive loads the full 15Amps is available on each channel just occurred that if properly combined the board could provide 30Amps of energy.

The properly combined part is still in progress.

Project system rocks, especially compared to something lesser in quality.

Will be running my house lights circuit within days on this Project inverter.

Seriously been working with these power boards for over 5 years and just now finding out the full potential of pure sine power.

More soon ️

 

[GridWorks Green Solar]

More research on the subject indicates need LC before the transformer and highest voltage possible to increase efficiency at the transformers input, Attempting to push square wave through an ISO transformer is just not going to work.

The right LC corrections will increase transformer through put. Testing continues. Temporarily going back to 13VDC to test the small 40VA transformers I have.

Both inverters will be tested at the next good solar opportunity, the project inverter and new ISO transformer at 180VDC and will be running exclusively the home lighting circuit.

The V4 NN inverter at 140VDC solar input and a simple independent A/C & B/C standard incandescent light bulbs test the bigger the better.

Inverter giving me a go to run at 13VDC off grid power supply.

More later

 

[GridWorks Green Solar]

Having deep thoughts about the V4 NN inverter, Could recreate the purple board and green satellite board and test again in different configurations but the effort involved would be better spent on one of the newer boards.

Going to choose to believe my first assessment about what I saw and tested, believe I might have been using separate batteries for each board for the 1st time testing of NN operation see picture.

Also my newest ideas in a high voltage LC circuit that may produce better results in driving transformers.

None of the circuit boards are configured this way so traces will need to be cut.

Going to proceed slowly looking for a home run. Battling multiple bias that were not present in the satellite board testing wouldn't it be nice if they disappeared

More soon ️

 

[GridWorks Green Solar]

Since the NN V4 board is under going surgery right now just put the lid over the top of the combo unit and took a picture, Not going to stay there because that is the access point to the DC isolators/switches for PV disconnecting and fuses.

Probably top of the next cabinet over to the right will be the final landing spot, Adjustments needed to lay the transformer down in the case, It will be nice at completion.

Project inverter running for years on the bottom was on top of the cabinets for a long time with a small fan.

more soon

 

[GridWorks Green Solar]

Cut both positive and negative traces in the middle of the circuit board, soldered in wires so each one can be open/closed or powered from a battery.

Finished soldering and attempted to check the board in the original config, A channel works normally B channel is currently not responding to signal but does respond to manually triggering the Mosfet at the output of the optic coupler.

Nothing big is wrong and after a break will gently resume testing.

More soon ️

 

[GridWorks Green Solar]

The optic coupler on the B side was sucessfully electrically triggered with a three volt battery.

Found a strong signal between the pin three diode for the B side and negative for 555timer power,

Should be easy to improve the drive to the optic couplers add nice bright signal indicators and more, Must keep an eye out not to mess up the stereo square wave signal.

No configuration testing till I have A & B output working stable again.

more soon

 

[GridWorks Green Solar]

Have been working since 3AM, can trigger B FET with the three volt battery in fact last test went through the 800ohm safety resistor for the optic coupler and still working to trigger the FET.

Straighten out where a connection I created earlier was bypassing 200K worth of potentiometers on the B side, If not for the 800ohm safety the optic coupler it would have been toasted many times over, none of this makes sense but at this point just have to fix it.

A channel is on a independent battery and no problems detected so far, A channel always works, still no response from B channel running on the 60Hz signal, have tested everything but still an issue with something that has run perfect in the past.

More testing ahead

Current configuration independent 555timer power, independent negative for A channel, independent negative for B channel, Positives are connected to make the common C terminal for both sides.

Slow and steady till I win this