Hand truck portable power station multi use

[julio347]

Hello, all!

Building a hand truck portable power station to take on camping trips and other backup uses. Big difference in my idea is to use the mounted batteries daily in my home setup and just disconnect whenever it's needed to go offsite. For my home setup I have 4 server rack batteries in a cabinet and a 18kPV inverter. For hand truck, going to use 2 batteries and an old off-grid inverter. To clarify, for daily usage the mounted off-grid inverter is going to be inactive so I'm trying to find a way to connect hand truck through DC means to the home batteries (through busbar for example). Either that, or use the 2nd port in the 18kpv. Some sort of quick connect method is what I'm looking for. Also, can battery be connected/disconnected when system is running? Any ideas or thoughts would be greatly appreciated! Thanks.

 

[740GLE]

I imagine you’re using 48v batteries for the hand cart?

If so what ones do you have in mind?

 

[Supervstech]

Choose a quality hand truck.
I like the ones that can fold down to a push cart, or lock into an angle push truck.

Will has several portable builds on his channel to peruse.

What plans are you making? What inverter capability?

 

[julio347]

I imagine you’re using 48v batteries for the hand cart?

If so what ones do you have in mind?

Yes, 48v.. same exact battery as home. Life power. Server rack type.

 

[julio347]

Choose a quality hand truck.
I like the ones that can fold down to a push cart, or lock into an angle push truck.

Will has several portable builds on his channel to peruse.

What plans are you making? What inverter capability?

Yes, I'm a big follower of Will! Haven't seen him do something like my use case though. I will definitely use of his designs, but need to confirm if I can do what I'm thinking regarding the DC connection.

 

[Supervstech]

Yes, I'm a big follower of Will! Haven't seen him do something like my use case though. I will definitely use of his designs, but need to confirm if I can do what I'm thinking regarding the DC connection.

It sure will, HOWEVER. The two batteries need to be VERY close in charge voltage before you connect them, or the surge can damage things, BMS, cables, etc…

 

[740GLE]

It sure will, HOWEVER. The two batteries need to be VERY close in charge voltage before you connect them, or the surge can damage things, BMS, cables, etc…

Meah I’d say “close” in voltage is the only concern, SOC can be out of whack (to a certain extent). Heck every day there’s someone posting here they have a 30% difference in SOC of batteries yet are connected to the same bus/voltage.

I’d say if system voltage is around 3.2/cell or 51.2, you’d have no issues if the cart battery was with in 2-3v different. Biggest thing is not charging a zero% battery with a fully system.

 

[dougbert]

Will has his Ver 5 cart on video now, water proof

 

[Supervstech]

Meah I’d say “close” in voltage is the only concern, SOC can be out of whack (to a certain extent). Heck every day there’s someone posting here they have a 30% difference in SOC of batteries yet are connected to the same bus/voltage.

I’d say if system voltage is around 3.2/cell or 51.2, you’d have no issues if the cart battery was with in 2-3v different. Biggest thing is not charging a zero% battery with a fully system.

Yes, actual voltage is more important than state of charge.

Very close to me is, dont hook a battery showing 40V to 50V battery voltage to a full 56V bank...
Bad things will happen.

 

[740GLE]

Yes, actual voltage is more important than state of charge.

Very close to me is, dont hook a battery showing 40V to 50V battery voltage to a full 56V bank...
Bad things will happen.

Nahh at worse a functional over current protection test marked complete.

 

[Supervstech]

Will has his Ver 5 cart on video now, water proof

Actually, its his V.4 cart.
He made a miscount.

 

[Brucey]

Choose a quality hand truck.
I like the ones that can fold down to a push cart, or lock into an angle push truck.

Will has several portable builds on his channel to peruse.

What plans are you making? What inverter capability?

I like this one: https://www.harborfreight.com/3-in-1-convertible-hand-truck-56409.html

 

[Brucey]

For quick disconnects:

Anderson SB175 Copper Battery Cable Assembly 1/0 Gauge UL AWG w lug/terminal/clamp

www.batterycablesusa.com

 

[Supervstech]

For quick disconnects:

Anderson SB175 Copper Battery Cable Assembly 1/0 Gauge UL AWG w lug/terminal/clamp

www.batterycablesusa.com

Wow... pricy.

 

[Brucey]

Wow... pricy.

It seems so but genuine sb175 Anderson connectors aren't cheap and then it's premium 1/0. Shipping is very reasonable. Their smaller wire sizes may work as well.

 

[740GLE]

Wow... pricy.

SB175 SB Series 175 Amp Anderson Powerpole Kit

Available in Blue, Gray, Orange Yellow, Red & Black. Recommended for use with 1/0, 1, 2, 4, or 6 gauge wire. Kit includes the housing and contacts needed for a single connector.

powerwerx.com

Feel free to DIY

 

[Brucey]

SB175 SB Series 175 Amp Anderson Powerpole Kit

Available in Blue, Gray, Orange Yellow, Red & Black. Recommended for use with 1/0, 1, 2, 4, or 6 gauge wire. Kit includes the housing and contacts needed for a single connector.

powerwerx.com

Feel free to DIY

Powerwerx has the legit connectors: https://powerwerx.com/anderson-sb-connectors-sb175-175amp

 

[Supervstech]

Powerwerx has the legit connectors: https://powerwerx.com/anderson-sb-connectors-sb175-175amp

You know you quoted the same company you posted, right?

 

[Brucey]

You know you quoted the same company you posted, right?

Sorry didnt see the link there.

 

[740GLE]

I snagged their 10 awg “45a” mini power pole connectors and a couple 50a connectors, pretty handy. I haven’t used the 50a ones yet.

 

[Brucey]

I snagged their 10 awg “45a” mini power pole connectors and a couple 50a connectors, pretty handy. I haven’t used the 50a ones yet.

Been thinking of a bunch of the 6" sb175 1/0s so every battery connection on my power ins can be quick disconnects. Might get crimp tool to make the longer other halfs myself.

 

[robbob2112]

Anderson connectors aren't intended for long term use without being disconnected once in a while. The contacts are silver and can oxidize creating a hot spot. Disconnect and reconnect periodically to use the wiping action and clean the contacts.

They use them in APC brand UPS to connect the batteries so they can be hot swapped, but those are changed out after only a year or two.

 

[pikachoo]

SB175 SB Series 175 Amp Anderson Powerpole Kit

Available in Blue, Gray, Orange Yellow, Red & Black. Recommended for use with 1/0, 1, 2, 4, or 6 gauge wire. Kit includes the housing and contacts needed for a single connector.

powerwerx.com

Feel free to DIY

Here you go:

"anderson sb175" 3D Models to Print - yeggi

1865 "anderson sb175" printable 3D Models. Every Day new 3D Models from all over the World. Click to find the best Results for anderson sb175 Models for your 3D Printer.

www.yeggi.com

$18 for a small piece of plastic lol

 

[robbob2112]

Here you go:

"anderson sb175" 3D Models to Print - yeggi

1865 "anderson sb175" printable 3D Models. Every Day new 3D Models from all over the World. Click to find the best Results for anderson sb175 Models for your 3D Printer.

www.yeggi.com

$18 for a small piece of plastic lol

The real ones are self extinguishing plastic, will melt, bubble, and might flame if there is enough heat. But remove the heat and it goes out.

 

[Supervstech]

Here you go:

"anderson sb175" 3D Models to Print - yeggi

1865 "anderson sb175" printable 3D Models. Every Day new 3D Models from all over the World. Click to find the best Results for anderson sb175 Models for your 3D Printer.

www.yeggi.com

$18 for a small piece of plastic lol

And two silver plated copper lugs...