Blog - GridFree

Czech Sustainable Houses - the...

The photos of the testing installation of the Czech Sustainable Houses project. The GWL/team has installed the the DC/AC power switch box. The initial testing was performed at GWL’s warehouse.. You may check.

29.Jun 2020
| Blog - GridFree

Czech Sustainable Houses –...

Few more photos of the progress on the first of the Czech Sustainable Houses. The roof timbers are going up and soon the whole raw structure will be accomplished.

In the meantime, we are working on a small Sustainable Garden project. A Sustainable house also needs a sustainable garden. Right?

More to

08.Apr 2020
| Blog - GridFree

Four types of solar...

Are you lost in the terminology of the solar installation types? Read our beginner's guide:

Grid-Tied Also known as “tied to grid”, or “grid-tie” system. This type of installation is aimed to make a profit by generating energy which is directly supplied to the grid. In some con

27.Feb 2020
| Blog - GridFree

Mickey Mouse at GWL/Power...

Some customers are rather exotic. We had a customer who came to our training in the mask of the Mickey Mouse. This is not a fun, this is a reality.

The customer was wearing the Mickey Mouse dress the whole training and was happy to take many photos.

19.Dec 2017
| Blog - GridFree

Internal resistence

The value of the internal resistance

Question:In your promotional materials you mention several times that the internal resistance of the LTO cells is“very low”,“lower than for the LFP cells”, is“only 1 mOhm and less”. However we have tested

03.Nov 2017
| Blog - GridFree

The GridFree inverters for the...

The GridFree inverters for the energy solutions

for energy self-generation.

11.Jun 2017
| Blog - GridFree

Monitoring of more GF-YC500T...


Can I monitor multiple microinverters GF-YC500T connected to different phases by a single ECU monitoring gateway?


Yes, enter the identification codes of all your microinverters placedon the label on the bottom of the microinverter after you willinstalled the ECU monit

26.Apr 2017
| Blog - GridFree

FAQ: What is a GridFree...

FAQ: What is a GridFree Solution

Question: What is the difference between the GridFree and the Grid-tied installation?

There are basically just two possible types of installations: Grid-tied and Off-Grid.

The grid-tied installation means the inverters work in synchronization w

13.Oct 2016
| Blog - GridFree

FAQ: Adding the solar...

FAQ: Adding the solar microinverter to the central inverter

Question: I have a permit to connect a 2 kWp solar installation. At this time I have a 1.5 kW inverter. I consider connecting another set of two 250Wp panels with microinverters to increase from 1.5kW to full power of 2 kW. Are the micro

09.Aug 2016
| Blog - GridFree

Understanding the EN 50438 for...

Understanding the EN 50438 for MicroInverter Operation

The EN 50438 gives the specifications of the Grid parameters. The microiverters are required to operate within the limits of this EN standard.

The parameters mean if the grid frequency is above 52 Hz or bellow 47.5 Hz, the microin

03.Aug 2016
| Blog - GridFree
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