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How to Build an On- and Off-Grid System (Backup Box Hack, Huawei SUN2000, LUNA2000, ) (Patreon)

Published:
2023-02-03 15:39:47
Imported:
2026-06
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Content

Unstable power grids, planned shutdown of electrical power, or even blackouts: How can we prepare our homes and home automation systems against such events? Today we will cover these topics with the eyes of an engineer, and I will show how I protect our home against short and longer outages. In part one we protected our homes against short outages. Today, we will protect them against longer outages. I will focus on my PV, but also show how you could use an ordinary emergency generator.

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How to build a full-blown on- and Off-Grid system (Huawei SUN2000, LUNA2000, Backup Box, Hack)

Unstable power grids, planned shutdown of electrical power, or even blackouts: How can we prepare our homes and home automation systems against such events? Today we will cover these topics with the eyes of an engineer, and I will show how I protect our home against short and longer outages. In part one we protected our homes against short outages. Today, we will protect them against longer outages. I will focus on my PV, but also show how you could use an ordinary emergency generator. My second channel: https://www.youtube.com/HB9BLAWireless Links: DIY PV plant playlist: https://youtube.com/playlist?list=PL3XBzmAj53RmwSzQ3oOhxbZJ6INWIPdgq Transfer switch: https://s.click.aliexpress.com/e/_DmUYXFv Small Backup box (not yet tested): https://s.click.aliexpress.com/e/_DBPLn8T Eaton UPS: https://amzn.to/3vRXcuj Huawei Solar: https://solar.huawei.com/eu/Products/FusionSolarResidential Patreon supporter companies: https://passiv-energie.gmbh/ https://www.welectron.com/ https://yosmart.com/ YouTuber Patreon: https://www.youtube.com/@MakersMashup/ The links above usually are affiliate links that support the channel (no additional cost for you). Supporting Material and Blog Page: http://www.sensorsiot.org GitHub: https://www.github.com/sensorsiot My Patreon Page: https://www.patreon.com/AndreasSpiess Discord: https://discord.gg/JfgDSa8 If you want to support the channel, please use the links below to start your shopping. No additional charges for you, but I get a commission on your purchases to buy new stuff for the channel My Amazon.com shop: https://www.amazon.com/shop/andreasspiess For Banggood https://bit.ly/2jAQEf4 For AliExpress: http://bit.ly/2B0yTLL For Amazon.de: http://amzn.to/2r0ZCYI For Amazon UK: http://amzn.to/2mxBaJf For ebay.com: http://ebay.to/2DuYXBp https://www.facebook.com/profile.php?id=100013947273409 https://twitter.com/spiessa https://www.instructables.com/member/Andreas%20Spiess/ Please do not try to email me. This communication channel is reserved for my primary job As an Amazon Associate, I earn from qualifying purchases #no#midroll#ads

Comments

Anonymous

This is New Hampshire (USA) with trees everywhere (over power lines) and brisk winters. Moving here 25 years ago power went out for 4 days. No water (well pump) no heat no lights just two fireplaces. Neighbor ran us an extension cord from his generator for light. Afterwards we bought a 5kw gas generator and had a manual power transfer switch installed to power 6 circuits plus well pump. Oil burner heater and water heater worked good. But eco minded me replaced oil with 3 stage geothermal heat pump with propane back up as third stage. Next few multi-day power outages were survivable but electric powered water heater exhausted its 80 gallons and cold showers were the norm. Got tired of noise of 5kw generator running for days and bought 3kw Honda inverter generator. I kept both and named them Large Dawg (Texan for dog) and Small Dawg. Small Dawg powered just 110 circuits but quietly. Wife soon informed me that she was not going to roll generators out and connect them up if I was on travel so we progressed to whole house propane powered generator with automatic staged switching. It was almost whole house but try as they might the installation company could not get it to survive startup load of heat pump. The staged switching tried its hardest brining on light 120 volt loads first and then bringing on 240 volt loads. The instant it tried the heat pump it not only shut down the transfer but also shut down the generator. Tried buying and installing soft start in heat pump with no luck. More transfer switch mods and heat pump is now on its own circuit and power outages resort to 3rd stage propane heat. This means no AC in summer during power outages but portable window unit is the backup to the backup to the… It’s currently -14F (-25C) and so far no power outages although you can hear trees bursting from frozen moisture in them. Probably just a matter of time. No more rolling out generators although I will switch to Small Dawg occasionally if propane is low, but now the rolling is replace with shoveling snow away from generator air vents. The exhaust vent clears itself and about 4 feet of what was once grass and is now baked soil. Yes we have UPCs on all routers/cable connections but cable company loses broadband after about 6 hours without power. They resort to driving around neighborhoods and chaining small dawgs (yep same as mine) to telephone poles and running extension cords to their equipment at the top of poles. I thought our neighborhood underground power was a confidence factor but power has to resort to poles somewhere and there are always tree branches waiting. Summary: There is no perfect solution.

Ben Greisler

I am not familiar with the specifics of the the inverter and backup box but I do have experience with big building sized standby generator sets from an engineering coop job I had in university. Since the backup box sends a signal to stop the inverter from providing power during an outage, could you have done something where upon loss of grid, a three phase (pole) relay disconnects the grid supply and then once disconnected the backup box is tricked into believing the power is back on by feeding it voltage from say a UPS this sending power back into the house. This gives you all three phases. It would require some logic and timing, plus some failsafes to make sure the inverter can't backfeed the grid during an outage (a big no-no). Just a thought and possibly an impossible one due to my ignorance of the systems specifically involved.

AndreasSpiess
>>101157654

Hi David, I just read in the newspaper that you have a record cold in your area. And here in Switzerland, where it should be cold, this winter was warm! You have a very elaborated setup. What I particularly like is that it can be used when you are away. A thing often not thought of in modern "Home Automation" times. I hope you will get through this time without damage!

AndreasSpiess
>>101190261

Hi Ben, unfortunately, our solar inverter only provides one phase. So, during an outage, I only have one phase available. Only more expensive inverters can deliver three phases (I explained why in an earlier video). The backup box has the wrong name: In reality, it only contains breakers and the timing to switch the inverter on in off-grid mode. This is why I had to use this trick.