New high efficiency solar concept no battery

20 FETs just arrived in the mail, will take a few days to build up the 3000 watt pure sine power unit, need to aquire a tube of heat transfer paste before final assembly, I think lack of heat transfer played a role in the past meltdown, by the numbers it should have been impossible for 1800 watts worth of panels to fry a 2000 watt board, also plan to reconfigure three strings of 9 solar panels 2700 watts worth to feed the 3000 watt pure sine power unit.

Will see you shortly with pictures of the new power system recharging the KIA Soul EV, really need this to work, if I don't kill the power boards in the next test I may leave the new 2500+ system in place and just replace
panels back to the older Gopower system.

Major break through in the project last night, no switchers needed, seamless operation, see photo of new block diagram at the end of the other thread.

Going to put all my short term efforts into the 3000 watt car charger/test.
Before years end I expect to iron out all remaining issues with the new power system, instead of batteries you will need isolation transformers.

It has started, In order to only do things one time I am putting all the new bells and whistles into the combo 3000 watt unit, #2 board is the 2000 watt board and will have 8 new FETs will transmit the four trigger signals to #1 board the 1000 watt board with four new FETs.
The 60 amp diode bridge will handle grid or second source input, outer set of diodes will be for PV input, the four diodes are to prevent a back flow of power back to the array 10 amp 1000volt max diodes.
In a few more days I should be able to do a list of tests that may result in a much better power system.

For picture see other thread.

morning 4:30 AM, May not need the the Isolation transformer for the 240 VAC grid power to 180 VDC power board input.
I will test this on alternative power boards just in case I am wrong.
Reasoning for it may be safe, I will be extracting power from the two hot phases (not the neutral or ground) the input chain as follows.

Two grid/alternate power hots for 240 VAC to diode bridge, 240 VDC to 180 VDC regulator,180 VDC to the power board. I have a trick with 40 watt standard appliance bulbs that allows for fault/bias testing with out the power board exploding if wrong about something.
Plan for this day is to build up the 3000 watt combo unit and install all the new FETs, lots of soldering and testing ahead.
Although several important questions need to be tested and answered the circuit audit passed and past experiences with these power boards says I am on the right track.
Major step forward is the new way it is physically impossible to back feed the grid through the diode bridge with DC power, dual DC inputs will make for seamless operation and reduce the complexity and expense of the project. Exciting week ahead.

Calling it a day 12 new FETs and 3 10K ohm resistors, logic jumpers next then mount everything in the case.
Should be operational in two days or less.
Picture in other thread of progress.

Big steps forward today in the project, see other thread for new power system diagrams and pictures, expect to wrap up testing in about a week. Expect the new system to take the lead in our hybrid solar home, seamless power transitions will be working in a few days.

Dual input DC module has been bench tested and is currently running the house lights circuit on solar, waiting on ISO transformer in the mail for first seamless transfer of power.
After CPU replacement the 2000 watt pure sine power board is back in operation, see other thread for pictures and details.

Good morning everyone, just completed the ISO testing on the pure sine power board.

Home Run ! After numerous tests (direct drive opposite phased 120 volt AC in 4 different configurations)
(Seamless transfer between solar and grid, transfer grid to grid, solar to solar)

Don't know if it is the diode bridge or blocking diodes but the power board does not care on the input side where the energy comes from

See other thread for pictures and full details.

Efficient seamless direct drive transfer of power is working perfect

Coming to a close on the second solar day with the seamless power system, Just hard to express how happy I am the direction the project is going, never imagined totally getting rid of the power switchers.

Next push is to fully automate the system, their is a commercially available App Controlled Outlet 120 VAC that response to voice commands and remote phone app control, for easy explanation I will call it a "ACO"

ACO on door bell transformer for main unit control on/off function.
Let's say six ACOs on the 120 VAC output to control all your stuff.
Setting the ACO time of day on and off time you can select what will run on solar and what consumes after hours secondary 120VAC power.

Things get busy around the holidays likely January before I get all the bells and whistles working.

After sun set permanently upgrading the new seamless pure sine system to 1700 watts solar capable using a mixed set of panels,(7 standard one hundred watt PV panels and one double 230 watt 24 volt PV for a total of 180VDC in series)

New power system drawing with one additional safety fuse on the secondary 120 VAC power, disregard all previous drawings, see other thread for picture.

More steps forward in understanding the power boards, If you want to learn something new about solar and solar panels just read the end of the other thread. Good day.

Hopefully final system diagram of the power board system, see picture in other thread.

Last Day of testing before one week off.

See you, Good Day now.

If you closely review pages 6 and 7 of the other thread you will see how I solved the puzzle.
The (WOW) moment was the full understanding of how the PV panels can power the pure sine wave power board directly and never cause any issues.
This power system should probably be called the ISO power system even in off grid although the transformer is not required it is recommended to protect the power board from connecting to a grounded device also corrects the 120 VAC pure sine power for a standard neutral and ground like grid power.

Do everything up to code, and fuse everything at recommend levels, recommend 250 volt fast blow glass fuses. Always safety first.

Good day all

Sorry it has been some time since my last posting, project has matured nicely Big steps forward in durability, PV power production and seamless backup / after hours support.

To catch up read the last five pages on the other forum.

Thank You

Long time since my last posting, Main project system running the Mini-split and more daily with 27 solar panels, Each 9 panel array pushing 180VDC at 5 amps, 5+5+5=15 amps, working great with grid powered secondary.

Inverter runs pure sine at 120VAC 60Hz 180VDC DC input to the inverters.

Have created a two MOSFET inverter that works with a dual 140VDC input and as of last testing provides 650 watts of good 60Hz 120VAC goodness.

Simple design and low cost $100 to $200 in quality parts.

Check out my latest post on the other forum. Advanced users and testing section.

More soon