Our History in Caritech

Our history in electronics and energy storage dates all the way back to 1980, back when I (John) was a young boy age 11, with a strong interest in RC Model Car racing, inspired by my late farther Finn Gjettermann ( picture left). And even many years before that my farther would sit at his work bench repairing and building advanced electronics systems with me as a toddler sitting on his lap.  

Welcome to the history of Caritech, the oldest new company with 41 years’ experience in the energy storage and EV Car charging industry.

1972

1979

1980

1982

1985

1986

1987

1989

1992

1993

1997

1998

1999-2005

2004

2006

2009

2013

2014

2015

2016

2019

2020

The Caritech story in the electronics and energy storage industry dates all the way back to 1972 when Finn Gjettermann sat at his electronics workbench repairing and building advanced electronic systems with me (John) at his lap. I will never remember those bonding times with my late farther as I just engulphed all the things I saw there.

I got my first RC model car in 1977, very slow but it worked, and I spurred an interest and hobby that I carry to this day.

As I grew older my farther introduced me to the world of Radio-Controlled modelling. In 1980 I got my first real “Pro” quality RC race car the Multiplex RC 12. See Pic. 

Was the year that I after seeing a series of TV programs reporting on a huge wind turbine being built by the Tvind foundation. It inspired me to come up with what I thought was a smarter design, (how was I to know that this Wind turbine could turn its canopy up against the wind) I without knowing about it designed a multi directional wind turbine based on the ancient principles of the Dutch inventor Savonius. I was allowed by dad to build it full scale, but he said that I my self had to call Uncle Kurt (Gjettermann) and convince him to use his machine factory for stainless steel tanks and mixers. My first project sale. I got the go for it and an apprentice (Gert Jakobsen) from the factory whom I used to play with helped me with the cutting and welding of the 2,5-meter metal construction. And Jens (Andersen) Dads RC buddy, was a jointer helped me cut the blades and build them from wood panels, we fitted a dynamo from my bicycle, and we produced electricity.  

A few years later a new sport grew in Denmark called RC Racing, and I joined the local Club started by my farther and we raced every week. But there was a problem, back in 1980 when we went out to race, when we found a suitable place to race there was no access to electricity. Again, my farther came up with a brilliant solution, he invented the worlds first battery container for charging electric cars, it was a simple but genius construction. See Pic.

We would carry heavy 12-volt lead acid battery car battery and it would charge our cars all day long.

Dad opens his second electronics company, Randers elektronik og Hobby, and now we are at the age in time when my little brother Niels (Gjettermann) was old enough to destroy the things we had build and short circuit every thing he could get his hands on, or cut live wires just to gaze at the sparks.

So, to protect his own life and the electronics repairs of the company’s customers (back then we repaired electronics and toys!) Dad build a small sized work bench for Niels where he had his own things and could do his destructive work in safety.

A year later my farther met the young Jurgen Lautenbach who had made a genius speed controller for RC cars based on Mosfet transistors, and these first DC/DC speed controllers immediately ruled the RC car championships around the world. My farther imported and sold a lot of those. This is also the year that I start my Electrical engineering training at Stærkstrøms teknisk værksteds, skole Århus. 

I start as an apprentice to become a certified Electrician.

After having sold fibreoptic based medical operation lamps, I designed a new way of building those lighting generators and ways to change colour and dim the light out-put.

Our farther died suddenly in 1992 so it took us some years before we really wanted to continue in the RC hobby industry.

I started a company selling lighting products to finance the development and build of the designs for fibreoptic lighting generators I had made earlier.

I sold my designs and a company was formed by investors to make use of my inventive talents with in fibreoptics and mechatronics. I was issued a patent on fibreoptic light in a solid bulb for even light distribution and another patent for Corona effect in backlight signage based on fibreoptics.

I applied for a patent in relation to a double light out put Light generator for fibre optic lighting.

I was involved in RC car racing again, racing in the Danish racing series of on-road racing and finished at European racing level.

Another company saw the light of day, this time under the university of southern Denmark. Optronics developed components to the Fibreoptics industry. Here we also developed some electronics and brought forward some new ideas for battery power tools.

I began developing yet another, and so far, the most advanced, compact, and powerful lighting generator ever for the Fibreoptics industry, it gave me a prize for that year’s most technically advance double extruded aluminium profile.


I was commissioned by some investors to investigate the possibilities of converting conventional ICE cars into EV cars, this reignited the spirits of the old days of electric car racing, and I could once more draw on my father’s legacy.

I was hired to design and build a modular based, pumpless, Silicon carbide filtration unit for third world countries, I took care of the initial B2B sale, big enough to go on the NYSE news board.

For a nondisclosed customer I was commissioned to design and file the patent application for a multifunctional silicon carbide water purification unit, comprising flexible solar cells, sown on to a carbon fibre fabric, with water heating ducts inside. This +100m2 blanket can also act as bomb shield in case of hostile air or ground attacks. Solar panels would pump polluted water into the filtration unit, feed a pump for showers and bring power to any communication devises and battery charging, and the heating ducts would act as heating for shower. All the parts for this system would be packed inside the purified water tank which was strong enough to be dropped from an air support by parachute.

Niels and I was commissioned to design and install a comprehensive communications system for block houses in Denmark, based on a wall mounted tablet, with features like, videophone door access, info system from administration, remote reading of heating, electricity and  water consumption, fire and water alarms, alarm system, and reservation of access to shared facilities and billing systems for these.

We did it successfully in record time under budget based on can gateway communication modules.

For a group of investors, I led a project of how to build and design a large-scale lithium Ion battery factory on European soil, in the Giga watt class.

What we today know as Caritech was born with the intention of helping the electrical grid infra structure to cope with the challenges of EV Car charging despite of lack of sufficient cabling. Based on the old ideas from my dad we began the design of a containerized battery storage solution comprising EV car chargers.

We quickly realized that the market for EV car charging was not a good market to be in due to low charging prices, low volume of EV cars on the roads, and expensive technology, especially the batteries.

After having finalized the design and carefully chosen every single component, we had Valmet in Finland to do an extensive survey, to whether they would be the right production partner. That came out negative, but it proved to us that we were years ahead of others in the Energy Storage Systems (ESS) market.

Valmet helped us to establish important contacts around the world and find the right partners in the industry. It all means that what Caritech offers today is based on our 41 years legacy from my farther, and the genius things he made and the way he always allowed me to play with technology and learn by doing.

We have learned what it means to invent, produce, and sell advanced components to the industry. We have learned the hard way that to have great success in business, nothing happens before Someone sells something to Someone, and that Someone wants a turnkey product ready to deploy.

Our comprehensive experience in radio communication M2M (1979) and can gateway IoT systems have enabled us to improve how the industry sees an BESS and giving our customers access to a never before seen combination of streams of income.   

During the first year of operation many people have asked us, do you have a Prototype or a Proof of Concept (POC), or where can we go and see one, well we made the first one 41 years ago, so what’s the fuzz. We have been here the whole time from Lead Acid to Nicad’s, to rechargeable Alkaline, to Nickel Metal Hydride’s and via the Lithium Ion chemistry to the one we make use of in our system today, Lithium Iron Phosphate Batteries.