Ohme OHOME0002GB002 Home Pro 7kW Type 2 Tethered Charger User Manual
- June 5, 2024
- Ohme
Table of Contents
Ohme OHOME0002GB002 Home Pro 7kW Type 2 Tethered Charger
Safety Precautions
- This document contains important safety information relating to your Ohme Home Pro charger. Please retain this document for future reference. Please read the document fully before using the Ohme Home Pro. Not following the safety instructions can result in electric shock, fire, serious injury or death. The charger should be inspected periodically to check for damage to the cabling and the enclosure. Do not use if the product is defective or appears damaged. Contact the Ohme Helpdesk for advice
- Do not attempt to open, repair, tamper or modify the Ohme Charger in any way. There are no user-serviceable parts
- We strongly recommend that a competent person (e.g. qualified electrician) installs and/or inspects the installation to check for safety and supply adequacy before use
- The overall installation should be in accordance with the IET Wiring Regulations and the IET Code of Practice for Electric Vehicle Charging Equipment
- Handle the Ohme Home Pro with care. Do not expose any part of the cable to severe forces, impact or sharp objects
- The Ohme Home Pro is only intended for vehicles that do not require ventilation during charging (NB all mainstream electric vehicles do not require ventilation)
- You may clean the Ohme Home Pro with a soft damp cloth. Do not use solvents or abrasives
Welcome to Ohme
This handy guide contains everything you need to know to set up your new
charger and get started on the Ohme app. It also covers some important safety
information. If you need a bit more information there are plenty of useful
resources available on our website and if you can’t find what you’re looking
for, our Customer Care Team will be happy to help. There is a dedicated
section for installers to find the information needed to quickly and safely
install the Ohme Home Pro.
Download the app
Downloading the Ohme app is an important part of setting up your charger. Go
to the App Store/Playstore on your smart phone or tablet, and search for
‘Ohme’.
Your charger information
Use the section below to make a note of your charger’s serial number, this is
important if you ever need to contact the Ohme Helpdesk. If you’ve had a Wall
Charger installed take a moment to write down the installer’s name, contact
number and installation date.
-
Serial number
o h m e -
Installer
Name:
Contact number:
Installation date:
Product Specification
Product Description
The Ohme Home Pro is an Electric Vehicle (EV) charging device, with:
- Input cable for connection to a power supply
- Charge controller, including integral residual current protection device and PEN fault detector
- Tethered charging cable, with both Type 1 and Type 2 variants
- Wall mounting accessories and cable holder
The charger is to be used with a single phase electricity supply (most UK houses are single phase). The product conforms to the latest safety standards including:
- RCD functions to disconnect the power supply if AC or DC current leakage occurs
- Neutral fault detection, avoiding the need for an earth rod to be installed
The Ohme Home Pro is a tethered unit, which means the cable cannot be removed.
Vehicle Compatibility
The Ohme Home Pro is compatible with all mainstream electric vehicles
thatuse Type 2 connectors. The Ohme app connects into vehicle manufacturer
APl/telematics services to obtain information from the vehicle where these are
available. API integrations include Tesla, Nissan, BMW, Jaguar and Renault.
More will be implemented in the app as they become available.
Installation
At a glance …
- Ohme units have PEN fault detection
- The RCD inside the unit is Type A and 6mA DC
- The units use the 4G mobile phone network, it is preconfigured to connect to the Ohme backend server automatically
- Load balancing can be setup with the current sensor (CT) clamp
- Ohme units are sealed, in most cases you will need to provide a junction box to connect to the supply
Mounting the unit
The Ohme Home Pro is designed to be wall mounted to a flat surface. Fixings
are included which are suitable for most wall surfaces (e.g. brick/render) but
the installer should select their own fixings if these are not appropriate.
Attach the back plate to the wall using four fixings, then mount the unit,
carefully guiding the three lugs into the rear of the unit. Use the supplied
three M4 short machine screws to fix the unit to the back plate. The charger
comes complete with a cable holder and charging gun holster to retain the
cable and vehicle connector when not connected to the vehicle. Use a further
four fixings to mount these to the wall. The Ohme Home Pro has a colour
display, dependent upon customer preference, it may be preferable to mount the
unit closer to eye level for comfort.
Electrical connection
The Ohme Home Pro is supplied with a one metre fixed input cable/flying lead
requiring termination on site to a suitable junction box, isolation switch or
mini-CU (not supplied). The overall installation must be compliant with the
IET Wiring Regulations and the IET Code of Practice for Electric Vehicle
Charging Equipment. Installation
should be carried out by a competent electrician with appropriate knowledge of
EV charge point installations.
Installer Mode
On first powering the unit, the Ohme Home Pro will be in installer mode. In
this mode:
- The RCD is automatically reset after 2 seconds to speed up the RCD tests
- The rating of the unit can be adjusted
- Load balancing can be activated and the threshold value selected
RCD
The Ohme Home Pro has a Type A 30mA and DC 6mA RCD built in. In some
circumstances (e.g. armoured cable clipped to wall) the supply to the charger
can be fed direct from a double pole MCB (to permit isolation) without an
additional RCD upstream. To avoid blinding of RCDs, we recommend that any
upstream RCD is at least Type A. Type AC RCDs may saturate and fail to operate
in the presence of smooth DC currents below 6mA. In the event of an RCD
activation in the Ohme charger, the unit is reset by power cycling (switching
the supply off, wait 5 seconds, and switch on) or by unplugging and re-
plugging the vehicle.
Earthing Arrangement
The Ohme Home Pro has an in-built PEN fault detection function, as described
in 722.411.4.1 (iv), to disconnect the vehicle from the live, neutral and
earth conductors if the voltage is above or below the prescribed levels
(greater than 253 V and less than 207 V). The units can therefore be connected
to the PME on single phase supplies.
Where the voltage is hovering above and below the threshold, this could cause
the supply to the vehicle to rapidly power cycle. For this reason, the Ohme
Home Pro has a timer built in; where the PEN fault detection has activated,
after the voltage has recovered, it will not reconnect the vehicle for 5
minutes. Ohme units periodically send voltage readings to our servers. Where
it is suspected that the supply voltage is persistently high, contact Ohme
with the serial number of the unit. Ohme can make small adjustments to the
voltage threshold which may allow the customer to charge their vehicle whilst
the DNO are contacted to address the issue.
Note
that the PEN fault detection function, according to 722.411.4.1 (iv) is
suitable for single phase supplies only.
Overcurrent Protection
No overcurrent protection
n is provided in the Ohme Home Pro, separate provision is to be provided as
part of the installation. We recommend a 40A Type C MCB
Wiring
The Ohme Home Pro is a single-phase device with five input connections:
-
Green/yellow= Earth
-
Blue= Neutral
-
Brown= Live
-
Grey= Current sensor inputs
The input lead is one metre long and the supply conductors are 6mm2 copper.
They need to be terminated to a junction box, isolator or direct into a
consumer unit.
To connect, typically an installer will either:
- Install a junction box at ankle height
- Feed the input cable though a wall and terminate on the other side
The junction box needs to be rated for 32A, have sufficient IP rating for the
location and have space for a three-way terminal block (no load balancing) or
five way terminal block (with load balancing).
Load Balancing
The Ohme Home Pro has a dynamic load balancing feature. A current sensor (CT)
clamp is available to measure the electrical demand of the property, or sub-
board. The unit will limit the maximum current available to the vehicle to
keep the household demand below the set threshold/fuse value. The unit is
designed to comply with the relevant parts of Engineering Recommendation (ER)
G100, which is a requirement of some DNOs for them to accept the charger
installation without prior agreement. Where load balancing is activated, if
the CT clamp is removed, or is faulty, the unit will revert to 16A. It is
therefore sensible to ensure the spare capacity, after taking account of other
loads and diversity, is at least 16A.
Note:
where the dynamic available capacity for the charger drops to below 6A, the
Ohme Home Pro will pause the charging for at least five minutes to prevent
rapid switching of the vehicle where the current is hovering above and below
the threshold.
Activating Load Balancing
Connect up the current sensor inputs to the CT clamp, you may need to extend
the cable. The CT clamp and wiring is not polarity sensitive – you can install
the CT clamp either direction. The wiring can be extended using additional
cable if necessary. To maintain reasonable accuracy, it is advisable to stick
to the following approximate limits:
Wire size used to extend the CT Maximum extension length
clamp
0.5mm2 5 meters
1.0mm2 10 meters
1.5mm2 15meters
In Installation Mode, select “Enable” to activate load balancing and use
the”+” and”-” buttons to set the unit maximum current value. Ohme Chargers use
a 4G data connection. They are pre-configured in the factory to talk directly
to the Ohme backend server. Signal coverage in the UK is generally very good
but it is important to ensure
the customer is aware that the unit relies on a mobile phone connection for
the smart features. Where it is known to be unreliable the customer should be
made aware that the smart features of the Ohme unit will also be unreliable.
Ohme cannot be held responsible for the installation location and issues with
the public mobile phone network.
Where the unit cannot establish data transfer at the time of plug in, the unit
will behave like a dumb charger and will not schedule the charging session.
Grid-sympathetic Charging
The Ohme platform is designed to help reduce power demand in times of stress to the local and regional electricity networks. As the adoption of EVs progresses, these features will become more important to avoid expensive and disruptive upgrades to electricity networks. To facilitate this, charging demand may be limited in times of extreme stress to
the electricity network to prevent power outages. This will always be done in an open and transparent way whilst limiting the effect on users of the Ohme platform. We understand that EV drivers are reliant on their vehicles. If you have any queries or concerns, please contact us for more information.
Troubleshooting
There is a troubleshooting and FAQ section of the website at www.ohmeev.
com If there are any queries or issues regarding
using the Ohme Charger, please contact the Ohme Helpdesk via email: help
@ohme-ev.com, telephone 0203 3751586, or send a
direct message on Twitter to @OhmeEV.
Cleaning
The Ohme Home Pro can be cleaned with a soft damp cloth. Avoid the use of
cleaning agents and solvents.
Maintenance
The Ohme Home Pro is maintenance free. If the charger is defective or damaged,
please discontinue use and contact the Ohme Helpdesk for advice.
Standards Compliance
The product complies with the relevant elements of:
-
BS EN BS EN 61851-1:2019 Electric vehicle conductive charging system.
General requirements -
BS IEC 62955:2018 Residual direct current detecting device (RDC-DD) to be used for mode 3 charging of electric vehicles
-
BS EN IEC 61000-6-3:2021 Electromagnetic compatibility (EMC). Generic standards. Emission standard for equipment in residential environments
-
BS EN IEC 61000-6-1:2019 Electromagnetic compatibility (EMC). Generic standards. Immunity standard for residential, commercial and light industrial environments
-
IEC62196-1 Plugs, socket-outlets, vehicle connectors and vehicle inlets
Disposal
Information on Disposal for Users of Waste Electrical & Electronic Equipment
(private households)
This symbol on the product and accompanying documents means that used
electrical and electronic products should not be mixed with general household
waste. For proper treatment, recovery and recycling, please take this product
to designated collection points where it will be accepted free of charge.
Alternatively, in some countries you may be able to return your products to
your local retailer upon purchase of an equivalent new product. Disposing of
this product correctly will help save valuable resources and prevent any
potential negative effects on human health and the environment, which could
otherwise arise from inappropriate waste handling. Please contact your local
authority for further details of your nearest designated collection point.
Penalties may be applicable for incorrect disposal of this waste, in
accordance with your national legislation. For business users in the European
Union: If you wish to discard electrical and electronic equipment, please
contact your dealer or supplier for further information. Information on
Disposal in other Countries outside the European Union: This symbol is only
valid in the European Union. If you wish to discard this product please
contact your local authorities or dealer and ask for the correct method of
disposal. Further information on disposal and general recycling can be found
at www.complydirect.com/the-recylcing-room.
Contact Details
Ohme Helpdesk can be contacted at:
Address: Ohme Technologies Ltd. Unit 74, Penrose Wharf, Penrose Quay
Cork Ireland T23 HF51
Email: [email protected]
Telephone: +44 (0) 20 33751586z
Manufacturer’s Warranty
The key terms of the warranty for the Ohme Home Pro are as follows
- The device is protected by a manufacturer’s warranty for 36 months from the date of installation. This covers parts and labour
- The minimum operational life of the Ohme Home Pro exceeds 36 months
- The warranty covers on-site assistance, repairs and replacements, at no cost
The warranty covers any defects in materials or workmanship under normal use. During the warranty period, Ohme will refund, repair or replace, at its discretion, at no charge, products or parts of the product which prove defective because of improper materials or workmanship under normal use and maintenance. This will include labour costs to repair or replace the unit at the installation site. Ohme will either repair the product using new or refurbished replacement parts or replace the product with new. A replacement product assumes the remaining warranty period of the original product or for 180 days from the date of the replacement or repair, whichever is longer. The warranty does not cover any issues that are caused by conditions, malfunctions, or damage not resulting from defects in the charging unit. The warranty does not cover damage or malfunction directly caused by abuse, misuse, negligence, accident, improper use, including but not limited to:
- Failure to follow the instructions and warnings provided in the product literature
- The environment or “Acts of God” such as fire, earthquake, flood
- General appearance of the product such as discolouration or damage to paint, labels, scratches, dents and cracks
- Any repair, alteration or modification to the product other than those authorised by Ohme
You may have other legal rights under local laws in addition to the rights
under this manufacturer’s warranty. Contact Ohme in the first instance to
discuss your options.
To initiate a service from Ohme under the manufacturer’s warranty, please
contact [email protected]. Please have the serial
number of the charging unit to hand and it will help if you have the details
of your installer.
Limitation of Liability
No liability will be accepted for any loss, costs or damage as a consequence
of using or misusing the product except, and only to the extent, where this is
caused by our negligence.
Terms and Conditions
For Terms and Conditions of the product please visit our website at www.ohme-
ev.com.