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I know I am a little late to the party but my 2 cents on this: Bat-Inv communication is quite important when you have several batteries in parallel and the inverter is more powerful than any individual battery. For example 100A batteries and an inverter that does 200A, because of the scenario...

This is an old post but just in case anyone is trying to look up the same question like I was NEC 2023 says: " 690.12 Rapid Shutdown of PV Systems on Buildings: PV system circuit installed on or in buildings shall include a rapid shutdown function to reduce shock hazard for firefighters in...

Okay I am embarking on a mission and want to share my work + Code in case someone else might benefit. also any suggestions or thoughts along the way are appreciated. (not sure if this is the correct place for me to post but it is my best guess) This is a more matured thought from an earlier...

Hey SeaGal, sorry for the silence, you have a fair point, I know it takes time and effort to reply to these things and I am sorry for absorbing your energy. Yes life got in the way. I read all of these very helpful and in depth comments and realised there was a lot i needed to research to check...

Thanks for the examples! that is exactly the kind of behaviour which sucks. Yeah, I think sadly it depends on the quality of the inverter programming (which isn't something you can garantee by simply paying more!) which is inverter specific, you might have an inverter which has great charging...

Ahhhh thankyou. for some reason I failed to find such a device, that was reasonably priced. I will look further into that option as it would save hassle. The only problem is it does want a high voltage battery, I was going to go for a 48V setup for convenience and safety

Yes, this is what I was trying to avoid, when I looked into my DNO to get a G99 they did not seem to have a way for me to apply not as a qualified installer so i sensed it was going to be problematic. My DNO is "Uk Power Networks". If I install even a small inverter then on top of the existing...

To get a power reading from the small panel I would get a power resistor that can dump 10-20W of heat, measure the voltage drop across the resistor and you should get a half sensible reading. this won't directly relate to your main solar panels though as they are operating under mppt conditions...

Fantastic! now that is the sort of cross purposing knowledge which is invaluable. The best I could think of was a CV CC SMPS with adjustable CC which on Ali was going to set me back ~£300for 3000W. Have you ever tried it in conjunction with other chargers? my only concern was back flow of...

Hey Pal1, I'm sorry to hear about your trouble. What you are trying to do is definitely possible on a budget. I suspect the problem you have run into is thermoelectric vs compressor fridges. Do you know what type yours is? a thermoelectric cooler uses an order of magnitude more energy than a...

I am getting the same feeling. If I had more time I would do the solar diverter for the fun of it but that is not the case right now. Sadly no, the regulations are fairly clear that they will not take the settings of your inverter into account which is sort of fair enough as trusting someones...

This was great to read, thank you MisterB! Yes your problem is exactly my problem. as you have found success I will try my hand at the official slightly more bureaucratic route and see if i can make it through before committing to beating a new path

Hello! just wanted to get some thoughts on a project. Problem: Adding a battery to house, there is a pre existing solar array which for regulation reasons can not be touched, but i want to make use it to help charge the House battery (other solar will be added but that's not relevant to the...

ahh, I didn't check the date xD I had been looking into something similar so got hooked in quick That is an interesting idea. I like it, that way you know there is sun and that the MPPT is not making full use of it in one measurement. How do you adjust the the expected MPP voltage? Image...

Yeah I found that, it is a cool project but like all the other Diverters I have found, the dump load is either a switch or heating water. The problem I was trying to solve was "dumping" that energy into a battery where i actually want it which requires gaining full continuous control over an AC...

Thanks, yes exactly. It is good to hear from someone else, as a sanity check, that the principle is sound. yeah the no power in an outage is not ideal but power cuts are rare where I am and it would be easy enough to fit a transfer switch and a cheap 2-4KW standard inverter for those rare...

Yes, thanks SeaGal! I simplified the diagram to make it less messy and easier to follow the concept but I may have over done that an obfuscated important details. in the description of what I meant by each icon in the diagram I mention the Fronius grid-tied string inverter 2.4KW which is...

Thats cool, so your house is islanded with frequency shifting compatible string inverters on the grid forming inverter. and if your Pi detects the sunny island increasing frequency and therefore ramping down solar production it turns on more loads. A neat solution if you have the right setup...