How to build a partial home backup system with EP500Pro
User Manual
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Entry type: FAQ, Entry ID: 10220703, Entry date: 21/10/2022
Contents
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 EP500Pro Backup System
- EP500Pro's Machine Type is set to "Single Phase" by default. DO NOT change this setting if you are operating a single EP500Pro.
- To build the backup system, you need the following:
| Accessories | Qty. |
|---|---|
| Transfer switch: Reliance 310A Pro/Tran 2 | 1 |
| 30A AC Charging cable | 1 |
| NEMA L14 extension cord | 1 |
NOTE: Please read the Reliance 310A Pro/Tran2 manual before installation. Reliance 310A Pro/Tran2 Installation and Operating Instructions.
2. 240 Volts EP500Pro Backup System
You can build the 240V Split Phase System by pairing two EP500Pro units together. The system also has double the available output power and capacity. Besides Two EP500Pro units, you also need the following:
| Accessories | Qty. |
|---|---|
| Transfer switch: Reliance 310A Pro/Tran 2 | 1 |
| EP500 Pro split-phase output cable (from BLUETTI) | 1 |
| NEMA L14-30R outlet | 1 |
| BLUETTI 30A-AC-charging-cable | 1 |
Please read the Reliance 310A Pro/Tran 2 manual before installation. Reliance 310A Pro/Tran 2 Installation and Operating Instructions.
Before installing the Reliance Controls transfer switch system, please make an 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 the transfer switch, that's to say, do not connect high-wattage appliances centrally to a single EP500Pro.
Split-Phase Backup System Configuration
❗ Caution! The backup split phase system must be properly installed by a licensed electrician.
How to configure the EP500Pro units:
- Turn off both of the EP500Pro units.
- Connect the EP500Pro units to the transfer switch via the EP500Pro split-phase output cable. One L14-30 plug goes to a unit.
- Connect the two EP500Pro units via the communication cable.
- Turn on either EP500Pro unit.
- Go to “Settings” and tap “Next”.
- Tap “Single Phase”, the machine type option pops up and select “Split phase”.
- Select the “Master” in the Machine Address pop up.
- Turn on the other EP500Pro. Repeat step 5 and 6 to set its machine type to “Split phase”.
- Select the “Slave” in the Machine Address pop up.
If the connection fails, clear the alarm history and wait a moment.
Please watch the video from: YouTube Video
NOTE:
- Disconnect the AC charging cables from EP500Pro units before connecting to the transfer switch.
- The split phase system can be controlled ONLY on the “Master” set.
- If one of the EP500Pro units 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 an electrical schematic. For the actual wiring diagram, please refer to Reliance 310A PRO/TRAN2 installation instructions.
- In the main panel, two Neutral/Ground bus bars have been connected together with copper strips.
Connect the EP500Pro units to the main panel
Charge the 240V split phase system with EP500Pro 30A split phase AC charging cable. Plug the cable to a NEMA L14-30 socket (240V) and the other two connectors into the AC input ports of the EP500Pro units. 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 EP500 Pro with standard AC charging cable in the split phase system, as this may cause damage to the batteries inside and invalidate your warranty.
L: Live wire N: Neutral wire
NOTE: The split phase system supports charging via solar panels. You can charge it by PV and the EP500Pro 30A split-phase AC charging cable simultaneously. (AC input only through the EP500Pro 30A split-phase AC charging cable but not the standard AC charging cable).
3. Accessories
3.1 Transfer switch
Recommendation: Reliance Controls 310A PRO/TRAN 2 transfer switch.
Purchase links:
3.2 BLUETTI 30A AC charging cable
Please buy it from BLUETTI official store.
3.3 BLUETTI EP500Pro split-phase output cable
Purchase from BLUETTI: BLUETTI Official Store
3.4 BLUETTI EP500Pro 30A split-phase AC charging cable
Please buy it from BLUETTI official store.
3.5 Communication cable for split-phase function
Please buy it from BLUETTI official store.
3.6 NEMA L14-30R socket
For charging the 240V EP500Pro split phase system.
Recommendation: Journeyman-Pro HJP 2710 NEMA L14-30R socket.
Purchase link: Amazon
3.7 NEMA L14-30 extension cord
If you want to get a 10 FT NEMA L14 extension cord, the referenced purchase address is as following:
Amazon Link for VOGREX 4 Prong 30 Amp 10 Feet Generator Extension Cord
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 purchase link: Amazon
Protection box purchase link: Amazon
3.9 Solar extension cable
Recommendation: iGreely 12 AWG solar extension cable
Purchase link: Amazon
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:
Website: www.bluettipower.com
Email: service@bluettipower.com
