Energy storage Solar Eclipse

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What is Solar Eclipse?

Solar Eclipse is the unique ingenious system which allows you to take advantage of the whole energy produced by your photovoltaic field, with no need to modify the plant nor purchase a new inverter.

Solar Eclipse is an electronic intelligent system that stores the exceeding electric energy produced by the traditional photovoltaic plant, charging common batteries (lead acid, gel AGM, …) for using it when needed (overnight or during low solar radiation moments).Solar Eclipse doesn’t need any modification of the plant, but is simply connected to photovoltaic modules one side and to the grid inverter the other side.Moreover, four 12 V, at least 100 Ah common batteries must be connected.






Solar-Eclipse Connection scheme

schema ENG

When the photovoltaic modules’ power exceeds the one requested by the user, Solar Eclipse starts storing in the battery pack the exceeding energy that otherwise would be given in the grid, behaving as a DC battery charger.

When the power requested by the user exceeds the one produced by the photovoltaic plant instead (overnight or during cloudy weather), Solar Eclipse takes energy from the batteries for giving it to the inverter, so the user doesn’t need any take from the grid.

So, Solar Eclipse operates as a battery charger when solar power is in excess, and as a radiated photovoltaic added string when solar power is not sufficient or present at all.

This way the grid connected inverter produces the needed and sufficient energy for domestic users, cutting down grid inlet daytime and working even nighttime.

Solar Eclipse is a smart photovoltaic energy storage system with the following logics:

  • Does never charge batteries with energy from the grid
  • The first energy produced by the photovoltaic plant gets used to power the user
  • Exceeding energy gets used to charge batteries
  • The energy still exceeding gets given in the grid
  • Uses the stored energy when the sun is not sufficient or overnight

Available either for single phase and three phases systems.


How does it work?

For better explaining how it works, let’s suppose the following cases about a 3 kW residential plant:

  1. Daytime, modules’ power exceeds the user’s one.Let’s suppose for instance that at 10.00 am the photovoltaic plant produced a 1,9 kW power and the user absorbed a 0,4 kW power.If the grid connected plant lacked of Solar Eclipse, a 1,9 – 0,4 = 1,5 kW exceeding power would be generated and given in the grid.If the plant is equipped of Solar Eclipse instead, the exceeding power will be used by Solar Eclipse to charge the battery pack and so the exceeding energy will be stored for a later use in powering the user. In this moment the grid connected inverter gets lacked of the exceeding power like the sun was missing daytime; from here the name “Solar Eclipse”. When the batteries will be 100% charged, the photovoltaic plant will give back the exceeding energy in the grid, behaving as a standard grid connected plant.
  2. Cloudy days, the produced power is not enough to satisfy the user.Let’s suppose a cloudy day or a moment when the energy requested by the user exceeds the one produced by the sun.If the photovoltaic plant lacked of Solar Eclipse, the energy need could only be satisfied by the grid, with a consequent increasing cost.If the plant is equipped of Solar Eclipse, the difference between the requested energy and the produced one will be furnished by the batteries in assistance to the photovoltaic field. This way the grid connected inverter will rise its power till the necessary level for satisfying the energy request, like the modules were suddenly radiated by the sun.
  3. Night, no solar power. At the sunset the photovoltaic plant stops working, so the needed power must be taken by the grid, with the consequent cost increase.If the plant is equipped of Solar Eclipse, the user will be powered by the energy stored in batteries during the day, keeping the inverter working.

 case ENG



Why purchasing a Solar Eclipse?


Whoever owns a photovoltaic plant shares the idea that sun energy can be transformed in electric energy with extreme simplicity and long time reliability through photovoltaic modules and grid connected inverters.

Any "prosumer" at the same time figures out that often the plant supplies for power when this is not needed. Often during the peak time, the energy need is very low and we’d like to have that production overnight.

A commercial spot used to say “power is nothing without control”; grid connected photovoltaic case is similar: the available power is much and free because is given by the sun, but we can’t manage it the way we’d like to.

As a matter of fact any grid connected inverter is equipped of an inlet circuit called “MPPT”, that tries any instant to reach the maximum power with no worries about the effectively need nor the possibility to store the energy for real needing moments.

The whole exceeding energy gets given in the grid with the consequent losses in costs, taxes, grid burdens, and expenses. Moreover the purchasing conditions are much worse.


Only Solar Eclipse can join solar power and battery power



Unlike the other storage systems Solar Eclipse, completely working in direct current and being connected before the inverter, can operate contemporarily with the photovoltaic field, adding the power supplied by the batteries and the one produced by the modules, when this is not enough to satisfy the user.

Moreover all the systems on the market need a switch to select the power from the modules or the one from the batteries.

This switch can be subject to weak reliability over the many commutations’ stress and cause voltage jumps.

All this won’t happen with Solar Eclipse because the inverter will always remain switched on, even overnight, granting a fluid and reliable plant’s operation.







Advantages and saving

The photovoltaic plants installed until today are all characterized by the common configuration to give the whole produced energy in the electric grid but the consumed one: such configuration is called “grid connected plant” or “photovoltaic plant On-Grid”. So, the users take advantage only of part of the produced energy, giving the else part in the grid for the other users. This configuration has been accepted until today because renewable energy production covered only a small percentage of the total production, originated by traditional source instead, and first of all because the sale price to the distributor was convenient.

Right now sharing energy with the grid means selling the produced energy at a 70% lower price than the nighttime purchase one. Each user must try to maximize the self consumption, avoiding centralized production’s transportation and distribution costs and saving energy costs nighttime.

In the standard on grid plants the self consumption is the ratio between the produced energy and the user’s direct consumption with no access to the grid. Such a quote depends by the dimensions of the photovoltaic plant and by the user’s load profile.

Usually a four people family with a 3 kW photovoltaic plant reaches a self consumption quote of 25%. In the following graph the requested power average trend and a 3 kW photovoltaic plant’s production in a sunshine day are represented.


 scritta senzasolar ENG

imm solar no


 scritta solar ENG

imm solar si


4 Simple Steps

Solar Eclipse gets very simply installed, without any plant’s modification!

Solar Eclipse is connected between photovoltaic modules and inverter on grid, like it was an added module.

As a matter of fact Solar Eclipse is equipped of solar connectors like it was a photovoltaic module.

So, it’s enough to disconnect the modules string from the inverter, connect it to Solar Eclipse, and fix Solar Eclipse’s solar connectors to the inverter.

Moreover batteries must be connected and a grid sensor to be installed at the household framework.

Over 4 steps Solar Eclipse is ready to smartly store the whole exceeding energy produced by the photovoltaic plant with no need of other wires or communication systems with the inverter or the house.


4steps ENG



Download Solar Eclipse’s brochure


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Tecno-Lario S.p.A.

P.IVA 00426040135
Via donatori di sangue, 1 20010 Vanzago (MI)
Via B.Buozzi 25\A 23900 Lecco (LC)
Tel.: (+39) 0341 282009
Tel.: (+39) 02 93540934
Fax.: (+39) 0341 284963
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