This is a typical "McMansion" generac pair of transfer switches. The customer thinks that having two 200amp panels is 400amp service. I detest them doing this because the service to the house is ALWAYS 25kva (100amp). And the generator is 24kw (100amp).
The issue is that code requires an outlet every 6' on the wall and they run out of spaces for branch circuits in a 200amp panel. This necessitates and second 200amp load center inside.
The folks at generac could feed their xfer from a single 4/0 cable from the meter can and THEN split into the two load centers. But then we couldn't sell that extra xfer switch could we?
This seriously complicates a future solar install.
The issue is that code requires an outlet every 6' on the wall and they run out of spaces for branch circuits in a 200amp panel. This necessitates and second 200amp load center inside.
The folks at generac could feed their xfer from a single 4/0 cable from the meter can and THEN split into the two load centers. But then we couldn't sell that extra xfer switch could we?
This seriously complicates a future solar install.
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Humor aside, if you look at the transformer on your pole, you will likely see 25 on it. That's 25kva (100amp) service. Often in older neighborhoods they will service 3 to 5 houses from a 37kva transformer. Yesterday I saw a 50kva feeding three house trailers and a commercial building.
I'm telling you this to push the point that it is very likely you can run your house on a 12kw inverter. You may need to install a softstart on your HVAC or buy an inverter with a good surge ability.
My house has been running for 6 or 8 years on two 6kw inverters.
Do not assume that because you have 200amp service that you need 200amps to run your house.
I'm telling you this to push the point that it is very likely you can run your house on a 12kw inverter. You may need to install a softstart on your HVAC or buy an inverter with a good surge ability.
My house has been running for 6 or 8 years on two 6kw inverters.
Do not assume that because you have 200amp service that you need 200amps to run your house.
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Off The Grid
Humor aside, if you look at the transformer on your pole, you will likely see 25 on it. That's 25kva (100amp) service. Often in older neighborhoods they will service 3 to 5 houses from a 37kva transformer. Yesterday I saw a 50kva feeding three house trailers…
Hell, today with "green and smart" our homes use a fraction of what they did 10 years ago. Now most new heat pump systems come with soft start built in. SO it is true, a 12kw inverter would be enough on most homes. A second inverter as a back up is also a good idea.
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rather detailed video to convert a normal minisplit into a geo thermal unit.
https://t.me/OffTheGridOfficial/8527
https://t.me/OffTheGridOfficial/8527
Telegram
Off The Grid
https://youtu.be/3o1jl2Qs9L4
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Someone in the chat just mentioned something out "balanced neutral" , so I'm going to do a brain dump....
In the US wiring standard we have Leg1 (120v), Neutral (0v) and Leg2(120v). Ideally, the neutral makes sure that your 120v devices get 120v relative to the center point.
What if that center point is missing? Let's disconnect the neutral back to the pole transformer and play along... Imagine you plug a 120v toaster into leg 1 and a 120v coffee maker into leg 2. Since both devices pull about 1200watts, even if the neutral is missing you'll get 240v split evenly between the two devices. if we add another coffee pot, L2 voltage will drop to 80v and the leg with the toaster will rise to 160v. They both still add to 240v but they are "imbalanced" relative to the neutral.
If you have lights that dim or brighten when you run the hair dryer or microwave, look for a loose neutral connection in your load center. The clue is that 120v changes but the 240v stays the same when things are switched on/off.
In the US wiring standard we have Leg1 (120v), Neutral (0v) and Leg2(120v). Ideally, the neutral makes sure that your 120v devices get 120v relative to the center point.
What if that center point is missing? Let's disconnect the neutral back to the pole transformer and play along... Imagine you plug a 120v toaster into leg 1 and a 120v coffee maker into leg 2. Since both devices pull about 1200watts, even if the neutral is missing you'll get 240v split evenly between the two devices. if we add another coffee pot, L2 voltage will drop to 80v and the leg with the toaster will rise to 160v. They both still add to 240v but they are "imbalanced" relative to the neutral.
If you have lights that dim or brighten when you run the hair dryer or microwave, look for a loose neutral connection in your load center. The clue is that 120v changes but the 240v stays the same when things are switched on/off.
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Forwarded from USDA PRIME MEMES
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Friends don't let friends carry sigs
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If any one wants to know what I need for Christmas.... https://mechmaxx.com/products/round-hay-baler-silage-machine-30-inch-width-20-inch-diameter
MechMaxx
3-Point PTO Mini Round Hay Baler With Twine Wrap, 20" Diameter x 28" Width Bales, For 15-50hp Tractor, HB3120
Tractor Power Required 15-50 Hp Minimum Tractor Weight 1500 lbs Bale Size （Diameter X Width） φ20 X 28 in Bale Weight 30 - 50 lbs Overall (L x W x H) 45 x 51 x 47 in Pickup Width 31.5 in Efficiency 1.24-3.11 mi/h Capacity 80 - 100 Bales / Hour Bale Wrapping…
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kinda neat... I'm sending messages to another mesher in Florence. Meshcore sent it the first time as a flood packet (ping pong off anything and every thing). Once I got an ACK from him, we had a path discovered.
I got ACKs that say each message was delivered.
I got ACKs that say each message was delivered.
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Solar patio light used to make mesh repeaters is $5
https://www.lowes.com/pd/Harbor-Breeze-60-Lumens-1-Watt-Black-Warm-White-Solar-LED-Spot-light/5018244381
https://www.lowes.com/pd/Harbor-Breeze-60-Lumens-1-Watt-Black-Warm-White-Solar-LED-Spot-light/5018244381
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This is the motherlode of ICF training. Watch the first, skip the next two and it gets detailed quickly. https://www.youtube.com/watch?v=DFYktAiOSF0&list=PLMFDU7ZHdfWpq4Nul1yohz3koxVQwKui8
YouTube
BuildBlock ICF Installer Training Series: 01. Introduction
Welcome to the BuildBlock ICF Installer Training series.
In this brief introduction, we'll discuss the basic components of ICFs, possible design options, how ICFs are designed and made, and why ICFs are approved as building method in the North American building…
In this brief introduction, we'll discuss the basic components of ICFs, possible design options, how ICFs are designed and made, and why ICFs are approved as building method in the North American building…
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If you are going to order a 32kwh battery, be aware of three things:
1)It MUST use MB56 cells. Several manufacturers are placing two 314ah cells in parallel to make the capacity. This is NOT good engineering practice.
2)You might calculate that you need 32kwh and think you can buy one battery but that battery may be limited to 200amps. If you need 12kw out of your inverter, you will need 250amps and will fall short. In order to get 12kw you will likely need two of any battery.
3)There are many good deals on batteries that do not use JK BMS. If you get one of these you may have vendor lockin when it is time to add more. JK BMS is the universal standard. Vendor A battery will communicate with Vendor B as long as they use JKBMS.
1)It MUST use MB56 cells. Several manufacturers are placing two 314ah cells in parallel to make the capacity. This is NOT good engineering practice.
2)You might calculate that you need 32kwh and think you can buy one battery but that battery may be limited to 200amps. If you need 12kw out of your inverter, you will need 250amps and will fall short. In order to get 12kw you will likely need two of any battery.
3)There are many good deals on batteries that do not use JK BMS. If you get one of these you may have vendor lockin when it is time to add more. JK BMS is the universal standard. Vendor A battery will communicate with Vendor B as long as they use JKBMS.
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Off The Grid
If you are going to order a 32kwh battery, be aware of three things: 1)It MUST use MB56 cells. Several manufacturers are placing two 314ah cells in parallel to make the capacity. This is NOT good engineering practice. 2)You might calculate that you need…
To follow up from my previous post... here is a picture of a 48kwh Panda battery. it has three 314ah cells in parallel with no fusing between cells. If one cell were to short out, the other 2 peers would dump amps into it and likely make a lot of heat. This is poor engineering practice. The 32kwh panda is the same it just uses two 314ah cells the same way.
For comparison here's a picture of a yixaing 32kwh battery with individual MB56 cells. Much better, much safer.
For comparison here's a picture of a yixaing 32kwh battery with individual MB56 cells. Much better, much safer.
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Brain dump.... when connecting power sources in parallel you should fuse each power source individually. That way if something goes horribly wrong the malfunctioning unit can pop it's own fuse.
Telsa car batteries consist of 7700 individual 18650 or 2170 cells. Each one is connected to it's peers with a 5 amp fuse. If one cell malfunctions it will pop it's own fuse and the rest of the pack continues to operate.
None of the chinese manufacturers are fusing individual LFP 280 or 314 cells. They just strap them together and hope for the best.
Telsa car batteries consist of 7700 individual 18650 or 2170 cells. Each one is connected to it's peers with a 5 amp fuse. If one cell malfunctions it will pop it's own fuse and the rest of the pack continues to operate.
None of the chinese manufacturers are fusing individual LFP 280 or 314 cells. They just strap them together and hope for the best.
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