You enter the description of your installation (chosen power, roof orientation), your annual consumption (to look on your electric bill, in general it is between 5000 and 15000 kWh per year), you remember a priori the option “without battery”, then only the case “Study in self-consumption”.

For the investment you indicate the price of the kit retained – if you install it yourself that’s all – if not the price of the installation in addition (500 to 1000 euros depending on the case).


The guaranteed life of the installation and microwaves is 25 years. If you choose the “no premium” option you indicate 0, if not 400 multiplied by the number of kw and spread over 5 years and 0.1/kwh for the price of electricity injected.
Finally the cost of maintenance is very low, 0 if you do it yourself.

So you immediately get the ecological and economic study, carried out by a state-dependent institute, perfectly reliable. Don’t hesitate to multiply the simulations to arrive at the best choice of kit (and contact us on contact@verstun.com if you have any doubts or questions).