Will you be developing an untethered zappi unit?
Yes, we’re hoping to release the untethered version September/October 2018.
Can I not just use an ordinary charger and plug my car in when its sunny or windy?
You can but the zappi is more intelligent in that it monitors import and export power and continually adjusts the charge power, this minimises power being drawn from the grid. So for example, if a load is turned on in the house, the charging power will be reduced, the same would happen when a cloud passes over.
As well as automatically reacting to house load and generation changes, zappi can also react to availability of economy tariff electricity, this can be by time of day or by presence of a mains signal.
Is zappi an Office for Low Emission Vehicles (OLEV) registered product?
Yes, zappi will shortly appear on the OLEV goverment list. We’re currently in the process of approving installers.
Will it damage the car battery if the charge current is continuously varied ?
A few people have shown concern about this, let us put your mind at rest: The EV charging protocol was always designed to enable the current to be adjusted during a charge, one good reason for this is the fact that in the future, the National Grid will need to do this as demand varies. The actual charge power is always fully controlled by the EV itself, zappi is simply taking advantage of this feature of the charging protocol.
If using the eco+ mode, is there a risk that the car will only be partly-charged?
That’s right – when charging in ECO+ mode there is a risk that the car will not fully charge. However, zappi has a smart boost feature that can be set to ensure the battery is charged to a set minimum by a set time of day. Alternatively eco mode could be used instead of eco+ this will ensure the charge completes. eco+ mode is best used when you’re not in a hurry to charge or when the weather conditions are perfect for charging.
How will zappi work alongside an existing third party power diverter such as immersun or iboost?
It would be best to have the eddi installed to heat your water instead – then the zappi would be able to communicate with the eddi and you would have complete control.
However, in answer to the question regarding third-party diverters; zappi has the option to connect an addition sensor to monitor a ‘diverter’ device. This allows you to effectively set the zappi as higher priority. It works by including the power used by the diverter as available surplus; the diverter will reduce power as zappi increases the charging current and vice versa.
The additional sensor required can be purchased separately here and can also be wireless when used with harvi.
How does zappi monitor the surplus from my PV?
The zappi uses a clip on current sensor to monitor the flow of import and export power to and from the property. This sensor simply clips around the cable from the meter.
Will zappi save me money?
Because of zappi’s special eco and eco+ mode the zappi charger is an investement, it’s the first charger on the market to pay for itself in savings. zappi uses surplus (free) solar or wind power from your microgeneration system to charge the electric vehicle.
Meaning on sunny or windy days you could be driving around on a completely FREE charge.
Can I access or download data from zappi?
The LCD display allows you to view charge logs which show the proportion of free and grid energy for each charge. We’re also developing an app that will be available towards the end of the year.
You’ll be able to download all your data from the date of install and remotely control the charge point to boost, set timings or charge mode etc… Stay tuned for updates.
Is it simple to replace my existing home charge point with the zappi?
Yes it’s a very simple swap with the same wiring, the only difference is that you need to clip the supplied current sensor around the meter tail and connect this to the zappi. You will soon have the option to purchase a wireless and battery free sensor.
I dont have solar panels or a wind turbine, can I still use zappi?
Absolutely, zappi’s FAST mode does the same job as any other EVSE on the market. The zappi is priced very similar to standard EV chargers and does so much more. If you dont have solar you can still take advantage of the ‘load balancing feature’ the ‘smart boost’ and ‘economy tariff sensing feautures. Then if/when you decide to have a micro-generation system installed you’re all set for free charging.
How easy is it to install?
For anyone competent, it is very simple; zappi needs a suitable supply (16 or 32A) and the current transformer (CT), which is supplied, is then clipped around the incoming supply to the property.
Your preferred electrician/installer can fit the zappi for you. If you’re struggling to find one please do not hestiate to contact us, we’ll do our best to source a local installer.
Does is matter what size PV system I have on my roof? Or wind turbine?
zappi doesn’t ‘care’ about the size of the PV or wind system, it only monitors the power being imported or exported from the property. The only limitation is the CT’s 100A limit which equates to 23kW single-phase generation or 69kW across three phases.
What does the eddi do?
The eddi monitors power imported from, and exported to the grid. Power generated by your PV or other microgen system that is normally exported is surplus power.
The eddi diverts this surplus power, to the water/storage heater or other load upto 3.7kW, thus preventing it from being exported.
How does diverting this energy to a resistive load benefit me the customer?
Surplus energy that is exported back to the grid can be as high as 80% of the total that is generated in the first place. The eddi can help you use up to 100% of your microgenerated energy, which is completely free!
How does eddi save me money?
The eddi allows you to store energy as hot water or heat even when you are out. Later on in the day you are able to use this free hot water in the home. Without the eddi you will be paying up to 15.0p per unit to heat your water. You may as well make the most of your own generated energy whilst it’s available.
eddi allows users to self-consume up to 100% of green energy, the eddi can save you up to £250 annually – more if you use electricity to heat your water and home! The higher the price you pay for your energy, be it electricity, gas or oil, the greater the savings will be from your eddi.
Do the eddi and zappi work together?
Absolutely, it’s always best to have myenergi products installed together. You can prioritse where the energy goes, eddi and zappi will work together to try and consume as much free energy as possible.
What is Varisine?
Varisine technology ensures that the power from the eddi is the same quality as that of the electricity that enters your property from the grid. This technology is the reason the eddi meets all CE product approval guidelines.
Careful consideration must be given when choosing a water heater a cheaper control method, such as phase angle could save money on the the initial cost of the unit, however may end up costing you in the future. We recommend reading into the compliance of products.
Why should I not install a phase-angle, cheaper energy diverter?
Phase angle devices dealing with large loads (up to 3kW) causes unwanted harmonic currents to be injected into the power system. These can cause electrical and radio interference, overheating and damage to inverters and other electrical devices and equipment.
Utilising PWM (varisine) as its control method ensures the eddi is one of the only devices on the market that meets the legal requirements to comply with the limits for ‘harmonic current emissions’ and other important EMC standards.
What if I dont have a hot water tank?
You can still use an eddi if you have an electric microgen system and the following:
- Electric storage heaters (the eddi is compatible with Economy 7 & 10)
- Electric Underfloor heating
- Space saving electric heaters
- Any other electrical resistive load up to 3.7kW with a mechanical thermostat
Where is the eddi installed?
The eddi is normally installed close to the distribution board, however it can be installed adjacent to the load if required.
If the eddi is to be positioned some distance from the distribution board, then you can either;
- Extend the length of the the cable on the CT sensor to approximately 50m using standard ‘category 5′ cable
- You can fit a Wireless Sensor (harvi) in conjunction with the CT sensor. The range of this device is approximately 30m-100m dependent on individual circumstances