Self consumption pays off!

21/01/2013
Two examples of private and commercial self consumption

The Deuble family in the Black Forest uses a battery to store power

The PV plant of Rempp, a medium-sized enterprise, produces the power needed for the whole production of one month

It remains in the family

The Deuble family consumes most of its solar electricity itself

The Deuble family from Wildberg in the northern Black Forest has seen savings in electricity since the summer of 2012, as the family of six consumes well over half of the electricity produced by the 3.3 kWp photovoltaic system on the roof of its house itself. That means one thing for the bottom line: their electricity bill is halved.

 

So how does that work? Quite simply! A Nedap Power Router with a built-in battery manager and two Hoppecke lead-gel batteries permits all kinds of variations: the family can store the PV electricity generated in the batteries, feed it directly into the grid, immediately consume the electricity by using appliances in the household during the daytime or consume the stored electricity from the batteries in the late evening hours. The Power Router storage package has flexible and versatile features yet is still ultra-compact and smaller than a washing machine.

 

Clever timing when using the electrical appliances in the household optimises the family's own consumption even further. Mrs. Deuble is an expert at this. In addition to managing her family of four children, she also looks after electricity management within the home, thereby ensuring that she gets the most out of the family's own consumption.

 

An ultra-clear and comprehensive online monitoring system provides all the figures for each period in real time: both in kilowatt hours or in euros saved. With today's expected service life of PV systems, it is easy to calculate the savings and independence that a storage solution would generate over the next decades.

A kitchen manufacturer in the northern Black Forest

 

Rempp K├╝chen in Wildberg an der Nagold is doing it: when the kitchen manufacturer extended its production and warehouse facilities, it installed a 160kWp photovoltaic system on the roof at the same time. In the month June alone, the 692 Axitec solar modules generated over 20,000 kWh of electricity, which was largely used for the company's own in-house production facilities.

 

A bidirectional meter calculates how much power the system has actually produced and how much of it has been fed into the grid. The percentage of power consumed by the company can be determined precisely. An average of 75 to 80 percent of the power generated by the system is used by the company itself.

 

This PV project is not just a beacon project from an environmental point of view, but will also pay for itself in the medium term. It also supplies the medium-sized company with a degree of independence from rising electricity prices, as well as self-produced electricity.