Hoymiles MS-A2 Manual

Packing List

NOTICE

• Immediately contact your supplier or distributor upon noticing any damaged or missing parts.
• In these instructions, the Hoymiles MS-A2 is referred to as "MS-A2" for short.

Product Overview

Button Quick Reference Guide
Button	Action	Function
	Press for 2 seconds*.	Turn on the MS-A2.
	Press for 2 seconds.	Turn off the MS-A2.
	Press twice in succession (Time Interval: 0.5s to 2s)**.	Enable the AC off-grid output.
	Press for 0.5 seconds.	Check the battery level.
	Press for 10 seconds.	Restore the network configuration.
	Press for 5 seconds.	Enable Bluetooth.
	Press for 1 second.	Pair the MS-A2 via Bluetooth.

*: If the MS-A2 is not connected to the grid, press and hold the power button for 8 seconds.
**: Leave the AC On-Grid Cable Entry unconnected before and during the AC off-grid output process.

LED Quick Reference Guide

	LED Status	Indications
		Solid white when connected to the S-Miles Cloud.
		Blinking white when connected to the router, but not connected to the S-Miles Cloud.
		Off if no network is available.
		Solid white when the system status is normal.
		Solid red when the device faults.
		Slow blinking white when the MS-A2 is ready for AC off-grid output.
		Alternating blinking red and blinking white when there's an off-grid port fault.
		Blinking red when overloaded.
		Solid white when connected to your phone.
		Off when not connected to your phone.

Technical Specifications

1. It can be customized by using the S-Miles Home App and can be adjusted up to 1000 VA.
2. The nominal voltage/frequency range may vary based on local requirements.
3. It is the ratio of max. output apparent power to nominal AC voltage.
4. The product is rated IP65 overall, with the exception of the standard AC socket.

Installation

Installation Tools

Mechanical Installation

• All installations must adhere to local electrical standards and the national electrical code.
• Shield the MS-A2 from direct sunlight and rainfall.

NOTICE
For safe operation and to avoid device damage, observe the following requirements when selecting the installation site.

• The installation site must be convenient for electrical connection, operation, and maintenance.
• The installation surface must be suitable for the weight (32 kg), dimensions, and cable length of the MS-A2.
• The installation site must have sufficient air clearances around the MS-A2. Clearances may vary depending on specific installations, and we suggest a general minimum guideline: maintain at least 3.5 mm clearance to the nearest adjacent sidewall on the up, bottom, left, and right sides.

Method 1 Floor-Mounted
Position the MS-A2 on a flat and stable surface. The back of the device must be separated from the wall by at least 1 cm.

Method 2 Wall-Mounted
NOTICE
The mounting kit (brackets, screws, and expansion bolts) must be purchased separately. You can email our sales team at sales@hoymiles.com to order the mounting kit.

1. Choose a location to mount the MS-A2.
2. Use a level to ensure the wall-mount bracket is completely level. Then mark drilling positions.
   
3. Drill in the marked positions. (Depth ≥ 50 mm)
   
4. Secure the wall-mount bracket to the wall with the M6 × 50 expansion screws. (Torque: 9 N•m)
   
   
5. Install the other mounting bracket into the MS-A2 and secure them using the M5 × 10 screws. (Torque: 1.5-2 N•m)
   
6. Hang the MS-A2 onto the wall-mounted bracket.
   

Electrical Connection

Before proceeding with the installation make sure the microinverter system is disconnected from the power supply, the solar panels are shaded or isolated, and the MS-A2 is turned off.

1. Disconnecting the Microinverter System from the Grid
   1. Unplug the HMS Plug and Play Cable from the socket.
      
2. Connecting the Microinverter System to the MS-A2
   1. Insert the HMS Plug and Play Cable into the AC Off-Grid cable entry of the MS-A2.
      
3. Connecting the MS-A2 to the Grid
   
   1. Insert the MS Plug-and-Play Cable into the AC On-Grid cable entry of the MS-A2. Listen for a click to ensure proper engagement.
   2. Plug the other end of the MS Plug-and-Play Cable into the socket.

Using the MS-A2

NOTICE

Powering on the MS-A2

NOTICE
If the MS-A2 is not connected to the grid, press and hold the power button for 8 seconds.

Creating an Account

1. Open the app and tap Register.
   
2. Enter your information and select the required checkbox. Then tap Register to complete registration.
   

Connecting the MS-A2 to Wi-Fi

1. Launch and log in to the app using your credentials.
   
2. Go to Devices > Add Devices. A pop-up dialog will prompt you to enable your phone's Bluetooth.
   
3. Follow the prompts to pair your phone to the MS-A2.
   
   
4. Select your home Wi-Fi network and enter your network password. Then tapConfirm to connect the MS-A2 to Wi-Fi.
   
5. Once connected to your home Wi-Fi, you will be directed to create your home energy system. Enter all information then tap Confirm.
   

Setting Up the Load Power Curve and Output Power

Setting the Load Power Curve

1. Tap System > System Setting .
   
2. Tap Load Power Setting.
   
3. Choose the day for which you want to set up the load power curve.
   
4. Divide the day into different periods and enter the load power value for each period.
   
5. Tap Confirm to save your setting.

Setting Up the Output Power

1. Tap System > System Setting .
   
2. Tap Output Power Setting.
   
3. Drag the slider to the right to set the desired output power.
   
4. Tap Confirm to save your setting.

NOTICE
Load power curve setting provides more detailed control over power delivery throughout the day. You can configure up to seven load power curves but only one curve can be applied per day. We recommend configuring load power curves to maximize the use of solar energy generated by PV modules.

Checking the MS-A2 and Energy System Performance

Checking the MS-A2 Performance
Tap Devices > MS-A2.

Checking the Energy System Performance
Tap System .

Storage and Maintenance

The following requirements should be met if the MS-A2 is not put into use directly:

• Keep the MS-A2 on a flat surface when storing it.
• Clean the MS-A2 and its components only with a cloth or a soft brush moistened with clean water.
• For the best preservation of battery life, charge it regularly. Even if you're not using the battery, periodically charge it every few months.
• Check the battery enclosure and connectors for damage or corrosion regularly to ensure they work properly.
• If you're storing the battery for a long time, charge the MS-A2 to 40%-50% at room temperature before storing it.

Please read all instructions carefully before using this product.

• PV modules produce DC electricity when exposed to light and can cause an electrical shock. Be aware of this.
• Do not exceed the MS-A2's output rating to prevent fire or injury. Overloading outputs above the rating may lead to fire or injury.
• Do not use the MS-A2 or any attachments if they are damaged or modified, as this may result in unpredictable behavior and pose a risk of fire, explosion, or injury.
• Do not operate the MS-A2 with a damaged cord, plug, or output cable.
• Keep the MS-A2 away from fire or high temperatures.
• Do not throw batteries into the fire. Batteries may explode in fire.

• Only use attachments recommended or sold by Hoymiles to prevent the risk of fire, electric shock, or injury.
• Do not attempt to disassemble the MS-A2. Seek help from a qualified service person for servicing or repairs to prevent the risk of fire or electric shock.
• Before performing any service, disconnect the power supply to reduce the risk of electric shock.
• Do not open or damage batteries, as released electrolytes may be toxic and harmful to skin and eyes.
• Do not use this product around strong static electricity or magnetic fields.
• Disconnect the entire system from the power source during installation.
• Do not put your fingers or hands into the MS-A2.
• Avoid misuse, dropping, or applying excessive force to prevent damage to the MS-A2.
• Shield the MS-A2 from direct sunlight to prevent rapid temperature increase.
• Keep the MS-A2 away from flammable, explosive gases, or smoke.
• The MS-A2 has an IP65 protection level and should not be submerged in liquids. If the MS-A2 accidentally falls into water, place it in a safe and open area to dry completely. Do not reuse the dried product.

• The MS-A2 is a Class 1 product and is required to be grounded for safety. But, since the MS plug-and-play cable already has a protective earth wire, you can simply use this cable for grounding without any additional steps.
• It is recommended to use a residual current-operated protective device (RCD) or a residual current monitor (RCM) of type B on the power supply side of this product.
• Before use, check the MS-A2 for any signs of damage, such as cracks, leaks, heat, or cable damage. If any abnormalities are detected, discontinue use immediately and contact our Technical Support Team.
• Battery servicing should be performed or supervised by a competent electrician who is knowledgeable about batteries and safety precautions.
• When replacing batteries, use the same type and number as the original. Follow these precautions:
  • Remove watches, rings, and other metal objects.
  • Use tools with insulated handles.
  • Wear rubber gloves and boots.
  • Keep tools and metal parts away from the batteries.
  • Disconnect the charging source before connecting or disconnecting battery terminals.
• Make sure the battery isn't accidentally grounded. If it is, disconnect the ground source. A grounded battery can cause electrical shock. To reduce this risk, remove any grounds during installation and maintenance. This rule applies to both equipment and remote battery supplies that don't have a grounded supply circuit.
• Ensure battery terminals and connectors are accessible for maintenance with the proper tools.
• Place batteries with liquid electrolytes so that the cell caps are accessible for testing and adjusting electrolyte levels.
• To minimize the risk of injury, closely supervise the MS-A2 when in use near children. Keep it out of reach of children and pets.
• Do not stand on the MS-A2.
• The MS-A2 must not be disposed of with other waste, and instead must be taken to the waste collection points for treatment, collection, recycling, and disposal.