SAFE - Domestic

SAFE as an energy load manager in on-grid systems, with or without renewable energy generation.

Most homes, offices, small enterprises, etc. (with a contracted power supply of < a 10 kW , in single and three phase alike) either have no possibility of installing renewable energy generating equipment (solar, mini-wind power or others) or, if it is at all possible to do so, only part of their consumption requirements can be met. Therefore, the greatest reduction in their energy bill is through the correct management of the energy purchased from the utility.

The solution will seek to lower the energy bill through the simultaneous implementation of two solutions: self-generation (if it is possible to install renewable energy generating systems) and/or through the management of the purchase of energy at off-peak rates for storage and subsequent use.

The energy storage contemplated in the standard model is for 12 Kwh, although this can optionally be increased x2 or x3 (or more) with a small variation in the equipment size. For systems of this type, an additional advantage is obtained with the UPS mode, as this prevents major disruptions in the event of any outages or malfunctioning of the conventional grid.

This option offers two possibilities:

Systems in which there is no renewable energy generation, in other words power can only be supplied from the conventional grid.

In this hypothesis, SAFE will be programmed to remotely connect with the official databases providing the daily publication of the official figures for the energy sales prices of the following day, and to automatically purchase the expected amount of energy in the off-peak time bands, to store it and make it available for consumption at the desired time. The amount of energy stored will depend on the SAFE storage capacity. This will be suitably sized to cover at least 90% of consumption requirements. Should the SAFE equipment be unable to supply the amount of energy for a one-off demand (for example to start up a motor, or item of equipment) then the consumption peak would be drawn from the conventional grid at that moment. Only the consumption peak will be drawn from the conventional grid, and this will be done automatically with no zero-point micro-cuts, so that it will be imperceptible to the customer.

Systems in which, in addition to the conventional grid, some renewable energy generation is also possible. In other words, part of the energy consumed is self-generated and part is from the conventional grid (hybridization).

The energy stored by the SAFE equipment is sourced from renewable energy generation (self-generated) and from the conventional grid. The SAFE equipment is programmed to store 100% of the renewable energy generated and to only draw the remaining balance from the grid. As for mode 1.1. above, the purchase of energy from the conventional grid shall take place through the remote connection with the official databases providing the daily publication of the official figures for the energy sales prices for the following day, in order to automatically purchase the forecasted amount of energy in the off-peak time bands. In this way, the energy consumed shall be: 100% of the self-produced renewable energy, whilst the balance shall be sourced from the conventional grid and automatically purchased at off-peak times.

ENERGY MANAGEMENT with and without renewables:

In this operating mode, the ENERGY BILL SAVING will be the sum of the following concepts:

Energy purchased.

The energy purchased from the conventional grid at the lowest price published in the official pages for the price band for the following day, is the energy which is strictly necessary to cover the storage requirements calculated for the consumption habits, and that required to cover the power peaks that may be required by the customer at any specific time.

Reduction in the power term.

Given the fact that consumption is based on the energy stored in the SAFE equipment, then it will be possible to reduce the contracted power, as the customer only needs to contract the power required to cover any consumption peaks in which the said storage is unable to meet demand.