Bluetti AC300 User manual

How to build
a partial home backup system with
AC300+B300
User Manual

How to build a partial home backup system With
AC300+B300
Entry type:FAQ, Entry ID:10220706,Entry date:14/11/2022

Franch
Germany
Netherlands
Thank You!
Thank you for making BLUETTI a part of your family.
From the very beginning, BLUETTI has tried to stay true to a sustainable future
through green energy storage solutions for both indoor and outdoor use while
delivering an exceptional eco-friendly experience for our homes and our world.
That's why BLUETTI makes its presence in 70+ countries and is trusted by
millions of customers across the globe.

1. 120 Volts AC300+B300 Backup System
2. 240 Volts AC300+B300 Backup System
3. Accessories
3.1 Transfer switch
3.2 BLUETTI 30A AC charging cable
3.3 BLUETTI AC300 split-phase output cable
3.4 BLUETTI AC300 30A split-phase AC charging cable
3.5 Communication cable for split-phase function
3.6 NEMA L14-30R socket
3.7 NEMA TT30-P to L14-30R extension cord
3.8 Circuit breaker & protection box
3.9 Solar extension cable
4. How to install Reliance Controls
Please refer to Reliance Controls website: www.reliancecontrols.com
4.1 How to install Reliance Controls ProTran2 - Part1, Tools and Planning
4.2 How to install Reliance Controls ProTran2 - Part2, Mounting
4.3 How to install Reliance Controls ProTran2 - Part3, Wiring
4.4 How to install Reliance Controls ProTran2 - Part4, Replacing Circuit Breakers
4.5 How to install Reliance Controls ProTran2 - Part5, Installing The
Power Inlet Box
4.6 How to install dd Controls ProTran2 - Part6, How To Operate
5. More information:
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Contents

Accessories Qty.
Transfer switch: Reliance 310A Pro/Tran 2 1
NEMA TT30-P to L14-30R extension cord 1
30A AC charging cable 1
How to build a partial home backup system with AC300+B300 (Only for US standard) 05
Declaration
•The installation should be performed by a licensed electrician. Improper
installation may result in death or serious injury and property damage.
•This document is provided for reference purpose ONLY and does not constitute
legal advice. Please consult the local licensed electrician for details.
BLUETTI shall not be liable for any damage or injury caused by improper
installation of the backup system.
1. 120 Volts AC300+B300 Backup System
AC300+B300's Machine Type is set to "Single Phase" by default. DO NOT change this
setting if you are operating a single AC300+B300 set.
To build the backup system, you need the following:
NOTE: Please read the Reliance 310A Pro/Tran2 manual before installation.
http://www.reliancecontrols.com/Documents/PT2%20Loadside%20Installation%20
and%20Operating%20Instructions.pdf

34
How to build a partial home backup system with AC300+B300 (Only for US standard)
06
Refer to the diagram below for proper installation of AC300+B300 backup system.
NOTE:
1: TT-30 Socket
2: NEMA L14-30 Inlet on the transfer switch
3: 30AAC Charge cable
4: TT30-P to NEMA L14-30 extension cord
TT30
L14-30
Transfer switch
Pro/Tran 2
Essential Load
Normal Load
Main Panel
1
2

Essential
Load
How to build a partial home backup system with AC300+B300 (Only for US standard) 07
NOTE:
•The backup system must be properly installed by a licensed electrician.
•Please check the voltage at outlets before plugging in your
household appliances.
•It is a electrical schematic. For the actual wiring diagram, please refer to
Reliance PRO/TRAN2 installation instructions.

Accessories Qty.
Transfer switch: Reliance 310A Pro/Tran 2 1
AC300 split-phase output cable 1
NEMA L14-30R socket 1
AC300 30A split phase AC charging cable 1
How to build a partial home backup system with AC300+B300 (Only for US standard)
08
2. 240 Volts AC300+B300 Backup System
You can build the 240V Split Phase System by pairing two sets of AC300+B300
together. The system also has double the available output power and capacity.
Besides TWO sets of AC300+B300, you also need the following:
Please read the Reliance 310A Pro/Tran 2 manual before installation.
http://www.reliancecontrols.com/Documents/PT2%20Loadside%20Installation%20
and%20Operating%20Instructions.pdf
Before installing the Reliance Controls transfer switch system, please make a
emergency energy plan that includes which appliances you need during a power
outage. It is highly recommended to “balance the load” between the two phases of
transfer switch, that’s to say, do not connect high-wattage appliances centrally to a
single AC300+B300 set.

Essential Load
How to build a partial home backup system with AC300+B300 (Only for US standard) 09
Split Phase Backup System
Caution! The backup split phase system must be properly installed by a
licensed electrician.
How to configure the AC300+B300 sets:
Step 1: Turn off both AC300+B300 sets.
Step 2: Connect AC300+B300 sets to transfer switch via the AC300 split-phase
output cable. One TT-30 plug goes to a set.
Step 3: Connect two AC300 units via the communication cable.
Step 4: Turn on either AC300+B300 set.
Step 5: Go to “Settings” and tap “Next”.
NOTE:
1: NEMA L14-30 Socket (Connect to AC300 Input)
2: NEMA L14-30 Inlet (Connect to AC300 Output)
3: 30A Split-phase AC Charging Cable
4: AC300 Split-phase Output Cable
L14-30
L14-30
Transfer switch
Pro/Tran 2
Normal Load
Main Panel
1
2
34

How to build a partial home backup system with AC300+B300 (Only for US standard)
10
Step 6: Tap “Single Phase”, the machine type option pops up and
select “Split phase”.
•Machine Type: Select Split Phase
Step 7: Select the “Master” in the Machine Address pop up.
Step 8: Turn on the other AC300+B300 set. Repeat step 5 and 6 to set its machine
type to “Split phase”.

How to build a partial home backup system with AC300+B300 (Only for US standard) 11
Step 9: Select the “Slave” in the Machine Address pop up.
If the connection fails, clear the alarm history and reconnect.
NOTE:
•Disconnect the AC charging cables from AC300+B300 sets before connecting to
the transfer switch.
•The split phase system can be controlled ONLY on the “Master” set.
•If one of the AC300+B300 sets is out of power, the split phase system
fails automatically.
NOTE:
•The backup system must be properly installed by a licensed electrician.
•Please check the voltage at outlets before plugging in your household appliances.
•It is a electrical schematic. For the actual wiring diagram, please refer to Reliance
PRO/TRAN2 installation instructions.
•In the main panel, two Neutral/Ground bus bars have been connected together
with copper strips.

How to build a partial home backup system with AC300+B300 (Only for US standard)
12
Connect the AC300+B300 sets to the main panel
Charge the 240V split phase system with AC300 30A split phase AC charging cable.
Plug the cable to a NEMA L14-30 socket (240V )and the other two connectors into
AC300s’ AC input ports.
The AC input ports should be connected to L1/N/PE and L2/N/PE, respectively. The
current capacity of AC input plug shall be ≥ 30A.
WRONG CONNECTION
Warning! DO NOT charge AC300+B300 with standard AC charging cable in the split
phase system, as this may cause damage to the batteries inside B300s and invalidate
your warranty.

How to build a partial home backup system with AC300+B300 (Only for US standard) 13
L: Live wire N: Neutral wire

How to build a partial home backup system with AC300+B300 (Only for US standard)
14
NOTE:
The split phase system supports charging via solar panels. You can charge it by PV
and the AC300 30A split-phase AC charging cable simultaneously. (AC input only
through the AC300 30A split-phase AC charging cable but not the standard AC
chargingcable)
Essential
Load

How to build a partial home backup system with AC300+B300 (Only for US standard) 15
3. Accessories
3.1 Transfer switch
Recommendation: Reliance Controls 310A PRO/TRAN 2 transfer switch.
https://www.bluettipower.com/ or
https://www.amazon.com/30-Amp-10-Circuit-Manual-Transfer-Optional/dp/
B00YHLCMHM/ref=sr_1_1?crid=39Q2LGVYX2BK6&keywords=310A&qid=1666357623&q
u=eyJxc2MiOiIwLjAwIiwicXNhIjoiMC4wMCIsInFzcCI6IjAuMDAifQ%3D%3D&sprefix=31
0a%2Caps%2C299&sr=8-1
3.2 BLUETTI 30A AC charging cable
Please buy it from BLUETTI official store.
https://www.bluettipower.com/products/ac300-30a-ac-charging-cable

How to build a partial home backup system with AC300+B300 (Only for US standard)
16
3.3 BLUETTI AC300 split-phase output cable
Please buy it from BLUETTI official store.
https://www.bluettipower.com
3.4 BLUETTI AC300 30A split-phase AC charging cable
Please buy it from BLUETTI official store.
https://www.bluettipower.com/products/30a-ac-charging-cable-for-split-phase-
function

How to build a partial home backup system with AC300+B300 (Only for US standard) 17
3.5 Communication cable for split-phase function
Please buy it from BLUETTI official store.
https://www.bluettipower.com/products/communication-cable-for-split
-phase-function
3.6 NEMA L14-30R socket
For charging the 240V AC300+B300 split phase system.
Recommendation: Journeyman-Pro HJP 2710 NEMA L14-30R socket.
https://www.amazon.com/Journeyman-Pro-Receptacle-Industrial-Grounding-
Generator/dp/B07P8CGH52/ref=sr_1_7?crid=1WRMKA4V397S&keywords=l14-30r+rece
ptacle&qid=1657944329&s=hi&sprefix=%2Ctools%2C405&sr=1-7

How to build a partial home backup system with AC300+B300 (Only for US standard)
18
3.7 NEMA TT30-P to L14-30R extension cord
For connecting AC300+B300 to the sub panel.
Recommendation: Parkworld NEMA TT30-P to L14-30R extension Cord.
https://www.amazon.com/Parkworld-885446-L14-30R-Generator-Receptacle/
dp/B08BHVFSN7/ref=sr_1_31?crid=E1CT2MYTUF6Z&keywords=TT30-P+to+L14-
30R&qid=1669196060&sprefix=tt30-p+to+l14-30r%2Caps%2C150&sr=8-31
3.8 Circuit breaker & protection box
If you have a residential solar array with a voltage of 12V-150V, you’re strongly
recommended to use a DC circuit breaker panel to enable or disable solar charging.
NOTE : If there are two solar panel arrays with a total open circuit voltage of 12-150V,
you also need two 2P 16A DC circuit breakers.
Circuit breaker: https://www.amazon.com/gp/product/B07GR32KCT/ref=ppx_yo_dt_
b_asin_title_o00_s00?ie=UTF8&psc=1
Protection box: https://www.amazon.com/gp/product/B07S75TV3V/ref=ppx_yo_dt_b_
asin_title_o00_s00?ie=UTF8&psc=1

How to build a partial home backup system with AC300+B300 (Only for US standard) 19

How to build a partial home backup system with AC300+B300 (Only for US standard)
20
3.9 Solar extension cable
Recommendation: iGreely 12 AWG solar extension cable
https://www.amazon.com/gp/product/B08KZNTYP5/ref=ppx_yo_dt_b_asin_title_o00_
s00?ie=UTF8&th=1
NOTE: The length of cable is based on the actual demand.
4. How to install Reliance Controls
Please refer to Reliance Controls website: www.reliancecontrols.com
4.1 How to install Reliance Controls ProTran2 - Part1, Tools
and Planning
https://www.youtube.com/watch?v=xTqjwt6WJ7o&list=PLpYCE0n7d22iDNwpVnOF9
HULSUYBBRY86
4.2 How to install Reliance Controls ProTran2 - Part2, Mounting
https://www.youtube.com/watch?v=wNbBHVHgw0Y&list=PLpYCE0n7d22iDNwpVnO
F9HULSUYBBRY86&index=2