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Parallel canbus to multiple inverters is exactly what SMA sunny islands do. While there can be network segmentation in can bus the packets below 3FF are not gunna be special. They’ll still get the low level ACKs.

ummm that's not how canbus works..... a packet is sent and every single client on the line that recieved it correctly asserts the CAN-H and CAN-L line. Anyone who didn't decode the packet properly does nothing. So it doesn't matter if more than one client hears and ack's the message / packet...

It may be as simple as buying some old analog kWh meters the power companies got rid of. You know the ones with mechanical wheels.

I’ll try to cut to the core idea. Inverters make less power as frequency rises. If too many charger devices connect at once and the frequency is at 60.0hz I need the chargers to draw less power. So they are programmed to behave opposite of pv inverters.

You are making me think.... thanks! Let's say I have a grid forming inverter , let's call it the master unit. If it has a minimal battery on it and is keeping a pilot signal for the 240v grid at 62hz. Each cabin has a PV inverter that's AC Coupled. Once their batteries are charged their AC...

that's the thing... batteries are hte most expensive part. I want each house to have and be responsible for their own power use and batteries. I do not want cabin #6 running the community batter down each night and then cabin #3 can't make coffee at 5am for work. I guess my goal would be to...

I taught my daughter many things... plug a tire. Brake job on a truck... and the most important thing she could have learned for the US electrical system... "black on brass will save yer azz".

My dad was forever mad at me for losing his tools. about 10 years after I'd moved out of the house, I was riding in the back of their car... dad had an epiphany.. he was still missing tools and I hadn't been home in 10 years. He looked at my mother.... a light bulb went on in his head. lol

When I was a kid radio shack was the place to get the things I needed. But in the late 90’s they started emphasizing cell phones over electronic components. I remember trying to substitute a transistor in the store for one they used to carry and listening to the salesman showing some woman all...

My neighbor and his wife are mid-late 20’s. He’s working in process control at a paper mill, programs eps32 projects, does solar with me, flies fixed wing and helicopters and is a tig welder. Handy guy to have around. Not the normal 20-something.

Yes, people are that silly. Usualy the result of not having a father figure in the house. Single moms usually call a plumber or sparky to fix things and sons don't learn a thing.

Wow.. so many responses.. THANK YOU. The system will be based in the USA. Actually I have two different setups in mind.... 1)This idea is actually on behalf of a friend who wants to grow micro greens/ hydroponics. He has 45 acres and wants to create 6-10 grow houses. For him a...

Single mode fiber optic Power Delivery??? FODP? new USB standard...lolz...

Please tell me more about this... I presently send a falsely low SoC to my SMA sunny island to force it to connect to the grid. Interested in the modbus packets you sending.... I assume they are not sent on canbus, right? or is there a message number for them in CAN?

Searching for a brain storming session.... Let's say I have a dozen tiny houses on my property. Each house has it's own inverter, batteries and solar. But we want to link the houses together. Recently I posted that I was planning to link my daughter's tinyhouse to ours via a 600v/240v...

Trying to give illusion of space inside by making the ceiling taller. Smart side sheets are good for sheathing.

Ha! I think the rule of thumb is to estimate the cost of materials and the. Double it. And then double it again. lol. Hmmm do I have my terminology flipped? I though a heating climate was where it tended to be above 70F 20C....

Personally, I wear a belt and suspenders with my parachute when I jump out of an airplane! 🙃

DOn't all mowers have a seat switch on them from the factory? My EGO 52" sure does.....

I'm going to ask a really dumb question.... why not add a switch under the seat that connects a precharge resistor? By the time you are seated and squared away, the caps are precharged and you turn the mower on as normal??

An observation of how a proper shore power generator ATS works.

I have an RV transfer autoswtich and when in shorepower, the neutral ground bond is broken on a 2nd set of contacts. On generator power the neutral and ground are bonded in the switch.

Hey I just read your oringial post again... those growatt inverters are not for the US market. They have a ground neutral bond on one end, not correct for split phase. I think there's a screw in the chassis that needs to be removed. Check will prowse youtube for that screw. It was all the...

Where is neutral to ground bond? When you say autoformer , it's job is to nudge the neutral around so it stays centered between the two 120v hots. If you had only a small load on one leg and a heavy load on the other 120v leg (unblanced), then the autoformer would be moving the neutral around...

Was there ever a solution or resolution to this?

One of my neighbors has a 9kw system and his min power bill is $9.36.... I have a 16.5kw system (ie >10kw) and they charge me a demand fee for the reverse power going out. My min bill is $14 and change. Please note my numbers are a little old because I haven't checked his bill lately... so...

That unit is a rebranded clipper creek and it needs a ground. It'll run a self test before working..... are you using it as 120v or 240v, by the way? You can easily feed it with 240v..... unfortunately you cannot set the charge current except to 8 or 12 amps. Other EVSEs like OpenEVSE allow...

Are you using the original EVSE? does it indicate a ground fault?

I ran into this problem testing the RSD modules... no setting on my Suny island would wake up the tigo modules. Later someone (maybe you??) suggested there was a min number of panels to get things kicked off. the 5v on the input makes sense now.... I would have had to put 9 panels in my test...

I've not been impressed with RPI.... I tried hosting Home Assistant on one and it kept not booting. If the OP needs a microprocessor based solution, I would use a ESP8266 or ESP32. but I think what he wants can be done with simple 24vac relays.

YOu can interlock the thermostats? it's low power, so small relays could be used. I imagine you would have a priority order so that if the main house called for heat, the bedroom would be shut off. I would do it with 24vac DPDT relays. Run the common for the thermostat thru the contacts of...

I'm using sunny boys AC coupled to my Sunny Island and want to feed in from a generator also. My generator is an onan RS12000 that has a microprocessor based speed control so it does not idle up to 62hz. This presents a problem that the sunny boys may backfeed the generator. I need an...

I can’t make propane at home. Sunshine is just falling from the sky. I’ll make the heat elements 1500w so they only use 25% of my inverter capacity.

Thanks for all the input guys!!!!

The pond is covered by trees. lol. But it is very small. As far as charging the car I will not allow the car to charge if battery below 40%. And I will use 600v transformers to provide a life line to my house.