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KeepIS

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Joined: 13/10/2014
Location: Australia
Posts: 2212

Posted: 06:24am 13 Jul 2026

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After battery Box upgrades, and making new copper plate BUS bars for the new layout, I finally rewired and refitted some existing 0 gauge and new 00 gauge wiring, it was easy to redo everything while still staying 100% off grid.

The black-box mid screen and to the right, is a Touch screen BMS setting Controller and Monitor, it selects any of the battery BMS units, and also selects any of the Battery balance modules in the battery units, and allows setup and adjustment to them as well.

As the shed is lined and insulated, it does not get below 14°C overnight in winter and is air conditioned in summer, remaining below 29°C, air-Con sometimes runs all night, as does one or two of the units in the house.

FULL electric home and big machinery in the workshop, SOC is never below 50% except with extended periods of black overcast weather. Mains has been off for over two years now, the only thing connected to mains is 16 year old solar in-feed unit, that is until the rebates finish or it claps out, I think rebates will finish first, then a new solar array of panels will replace the old in-feed array and connect into the existing off-grid setup via another solar regulator or two. You can guess what will happen when that is finished shh!

For now, no E-bills, always in credit, even after transferring most of the ever increasing credit out every 3 quarters or so. I know I sound like a broken record, and here is a another broken track, the WG Inverter is a Beast.

NANO:Inverter V 8.4ks - Linux AvrDude GUI script V4.1

Revlac

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Joined: 31/12/2016
Location: Australia
Posts: 1288

Posted: 11:46pm 15 Jul 2026

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Its looking very good and tidy

, you will have to find something else to do after this.

I have often been told I would need a 100 years to complete all the other projects I have

...I'm sure you have plenty of interesting stuff to do.

Cheers Aaron
Off The Grid

KeepIS

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Joined: 13/10/2014
Location: Australia
Posts: 2212

Posted: 01:43am 16 Jul 2026

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Thanks, it never ends does it, not enough summers left to finish all the things I want to build, at least it keeps the remaining brain cells active and occupied.

NANO:Inverter V 8.4ks - Linux AvrDude GUI script V4.1

KeepIS

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Joined: 13/10/2014
Location: Australia
Posts: 2212

Posted: 12:56am 18 Jul 2026

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phil99 said Plain induction motor refrigerators and air-conditioners are protected by a Clixon style over temp & over current unit. They won't soft start, just sit and hum till the Clixon trips. After it cools and resets (a couple of minutes) the compressor starts on full volts.

Most made in the last 20 to 30 years use a PTC thermistor in series with the start winding to switch it off after startup. That has to cool down too so the Clixon is intended to be slower to reset than that.

Hi Phil, I somehow missed your post a few pages back, thanks for that information, I've heard that hum sound in our old fridge (now replaced) after a momentary Mains brown out, but I was unaware of the mechanism, initially I though that it had damaged the fridge motor, but it later started up fine, now I know why.

NANO:Inverter V 8.4ks - Linux AvrDude GUI script V4.1

KeepIS

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Joined: 13/10/2014
Location: Australia
Posts: 2212

Posted: 08:36am 04 Aug 2026

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Also posted in the WG build thread:

I just finished building one of the new WG power boards, this is the one with two very small vertical mounted gate drive PCBs. The power board is slightly shorter than the old board, and it allows the FET ferrite beads to be fitted without any gymnastics on the High side drains, really nice!

This new power board is the simplest and quickest board to build of all, however the SMD gate drives PCB's are time consuming, but they are easy build with plenty of room between components. As usual, the trickiest parts are the resistors and caps, but that's coming from someone who dislikes soldering tiny SMD components anyway, and it took me longer as I was checking every component before and after it was soldered in.

This is my first build of the new board with its revised construction and layout, so I also noted the things that might trip up new builders, as there will soon be some people building this inverter, likely some with little or no experience, I now feel confident that this indeed the best version for them to build.

It's definitely the best version of all from a construction point of view, especially the revised FET layout and Isolated supply mounting, it's pretty close fool proof now.

Anyway, before calling it a day, I fitted four FETs, the test Toroid and chokes, NO caps, powered it, it worked first go

I'll make another tomorrow, should be a lot faster this time.

NANO:Inverter V 8.4ks - Linux AvrDude GUI script V4.1

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