In short: Up to 50%.
Wall plugin solar kit produces solar energy for self consumption at home. The energy it produces is used directly by your household appliances. This avoids your household having to buy that energy from your power company, lowering your power bills.
Your savings are therefore determined by: how much energy your plugin solar kit produces and how much you pay your power company per kWh, with all extra costs and taxes included.
For example, in Spain, a Performance 800 bifacial plugin solar kit with two south-facing solar panels, a 20° angle and good back irradiation produces up to 1,951 kWh per year. At the average electricity price of €0,23/kWh, you save €458 per year (1.951 kWh x €0,23/kWh = €458). You can calculate how much you can save at your home with our savings calculator.
How much the savings are on your overall electricity bill depends on how much you consume in total. A house consumes much more than an apartment, so the effect of a solar kit is likely higher for an apartment. The more people you are in the family, the higher your total consumption. Since plugin solar kits are limited to 800 W by law, for households of one to three people the savings of a plugin solar kit will be higher as a percentage of total electricity consumption than for larger households that consume more. Also, if you have a lot of high-consumption devices on for a lot of time, like air conditioners, water boilers, ovens etc, your consumption is likely much higher than the 800 W of peak output your kit can deliver.
But take into consideration that some savings are better than none at all. And the higher your energy consumption is, the more likely it is that you will consume 100% of your kit’s output, maximizing your economic return.
