Home integration of otherwise portable system

betterways

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Oct 29, 2019
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Hello,

I am intrigued by this kit, which is a Bluetti ac200P, plus panels, cables & a transfer switch for output from the Bluetti. https://shopsolarkits.com/collectio...ucts/bluetti-ac200p-quad-home-integration-kit

But I am interested instead creating a system using an MPP or Growatt and batteries rather than the Bluetti. So how do I determine what kind of transfer switch? They don't sell it separately at shopsolarkits.

I have access to used panels, which if I understand correctly, can't be used on a grid-tie or house-mounted system, right? At least not in most cities.

I believe the 2000w capacity of the Bluetti is about right for me. . I have been habitually keeping my electricity usage low for years not. My electric bills in the summer & winter months when the centrals are used hover between 500 & 600kwhs. And are minuscule in most spring & fall months. My November bill says I used 181kwh. I am house hunting, and hope to do even better in the new place. I live in about 1500 sq ft 60-year old duplex and am looking for another small house.

 

Samsonite801

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I am intrigued by this kit, which is a Bluetti ac200P...
But I am interested instead creating a system using an MPP or Growatt and batteries rather than the Bluetti. So how do I determine what kind of transfer switch?

I'm slightly confused on the above...

The transfer switch. If you use an MPP or Growatt, they have the ATS (auto-transfer switch) function already built-in to the units, they have AC grid power input, and can manage all connections without requiring adding an ATS.

Does the ATS question relate to the Bluetti or something?
 

betterways

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I'm slightly confused on the above...

The transfer switch. If you use an MPP or Growatt, they have like ATS (auto-transfer switch) function already built-in to the units, they have AC grid power input, and can manage all connections without requiring adding an ATS.

Does the ATS question relate to the Bluetti or something?
Yes, but I am talking about making a portable generator system like the Bluetti, just cheaper and less recognizable & stealable, and more upgradeable with replaceable parts. Mounted on board or in a crate like Will frequently demonstrates. So the MPP wouldn't be connected to the house. The Bluetti kit includes such a transfer switch.
 

Samsonite801

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Yes, but I am talking about making a portable generator system like the Bluetti, just cheaper and less recognizable & stealable, and more upgradeable with replaceable parts. Mounted on board or in a crate like Will frequently demonstrates. So the MPP wouldn't be connected to the house. The Bluetti kit includes such a transfer switch.

But again, MPP has ATS function already in it... I don't understand (please be patient with me as I just want to make sure I understand the intention)...

What is the Bluetti transfer switch transferring in its implementation?
 

Alderon57

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I believe the OP may be wanting to create a DIY 24V/48V system that could power portions of their home in the case of a blackout. So, power transfer to the home, not the home powering the generator.
 

Samsonite801

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Oh ok, that makes a lot more sense now. I'm surprised I didn't think of that in the moment before... Seems obvious now :geek:
 

Samsonite801

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Well they have various transfer switch solutions, from manual (dual-breaker w/ interconnect-bar connected across them), to relay-based auto-transfer switches and such.

I wonder what he meant about the Bluetti including an auto-transfer switch, I guess I didn't understand that part still. Like they can include you one (like a Bluetti part number, as an accessory to add in with it) to install into your house?
 
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Samsonite801

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Perhaps a cheaper one like one of these would work?

or:

Do you have a separate physical panel for critical loads vs other loads circuits, or is the idea to divert all house loads from a single panel off of the ATS circuit?
 
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