ES

Solar Energy for DIY Enthusiasts

This page describes medium size photovoltaic systems which are easy to install. All components can be bought in trusted webshops. Most of the installation work can be done by people with basic technical skills and the willingness to learn. Contributing personally to the installation of your solar system will make you proud. It will allow you to step into green energy at unbeatable low cost – following a path we carefully describe.

Based on our experiences with helping people to build their own solar systems we feel that our concept can be especially helpful in Ukraine where the energy sector deeply suffered from Russian attacks and where qualified craftsmen are in short supply these days. We even donate the electrical equipment for some systems to Ukrainian institutions.

We describe three different product families:

Easy-Solar-Micro ( ES-Micro )

ES-Micro is a fairly cheap solution. It is very easy and safe to install because it operates at low voltages on panel side and on battery side. In some cases you will not even need an electrician.

The ES-Micro models tolerate varying sunlight conditions because the inverters optimise the use of each panel individually. They can live with a mixture of old (used) panels and brand new panels. You can add a battery, typically a modern Lithium 48V battery. However, if you have access to used batteries with older technology it may even be possible to use them. The overall energy storage efficiency is around 77% – which is not perfect but acceptable in many cases.

The ES-Micro family is designed for a range of 2-16kWp. By default it feeds all its energy into your building and any surplus will go into the grid. Grid feeding can be delimited if this is required by legal restrictions or by your grid provider’s rules.

In combination with a battery the ES-Micro family will provide energy from the battery during off-grid periods. Even more, some of its panels will be able to produce solar energy in such periods.

With your permisssion we would like to publish your production data in anonymized form on our website. In case we see any problems or if firmware updates are necessary we may be able to help you. Of course you have admin access to your system and can monitor all data via browser or via an app on your mobile device. It is possible to monitor each single panel individually.

Easy-Solar-Mini (ES-Mini)

ES-Mini is a small classical inverter with a single maximum power point tracker which can handle up to 8 solar panels connected in series (tyoically you will use 4, 5 or 6 panels). Web connection is made via a USB stick. A smart meter can be added if uploading excess energy into the grid must be avoided or delimited. If you live in a place where the public grid is down from time to time we would recommend to add a portable UPS (uninterruptable power supply) with a suitable size (typically 1kWh or 2kWh).

With your permisssion we would like to publish your production data in anonymized form on our website. In case we see any problems or if firmware updates are necessary we may be able to help you. Of course you have admin access to your system and can monitor all data via browser or via an app on your mobile device. Monitoring is related to strings, not to individual panels. The ES-Mini needs undisturbed access to sunlight for all panels because they are connected in series. You can use modern and older panels, but all must be of the same type.

If you want a very cheap solution for a small (2kWp) system this can be the best solution for you.

Easy-Solar-Hybrid ( ES-Hybrid )

This product family is designed for 7-40 kWp. The installation is more challenging and you have to deal with high voltages because panels are connected in series and the battery also operates at a high voltage. It requires a professional electrician at least for the installation of energy meters and fuses, for final inspection and grid connection.

All panels should have free access to sunlight. You can have two groups of panels (“strings”) facing into different directions.

The overall system efficiency including energy storage is around 95%. This product family always comes with a modern battery. You can integrate used panels if they are all of the same type. Energy feeding into the grid can be controlled. Full off-grid functionality is an integral part of the ES-Hybrid family.

With your permisssion we would like to publish your production data in anonymized form on our website. In case we see any problems or if firmware updates are necessary we may be able to help you. Of course you have admin access to your system and can monitor all data via browser or via an app on your mobile device. Monitoring is related to strings, not to individual panels.

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