SOLARWATT’s award-winning solar battery outperforms other systems for a number of reasons. Earlier, we looked at speed – another factor is its ‘intelligence’, discussed here. We’ll look at a further aspect soon.
Some people assume a storage battery should charge fully, and as quickly as possible, as soon as solar power is available. But it’s not so – a 100% charge means very high “chemical stress” for battery cells. Charging should be as efficient and gentle as possible.
Typical home batteries start early in the day, as soon as excess solar power is available, replenishing fully in the morning then remaining at maximum all day. The cells age much faster, drastically reducing both the service life and the long-term benefit to the user.
MyReserve batteries by SOLARWATT use self-learning software that analyses solar power generation and consumption over several days. They reach 100% charge shortly before sunset so time spent in this state is kept short as possible. It doesn’t matter when a unit is full so long as you have power when you need it – typically in the evening.
MyReserve’s self-learning algorithm will create an optimal charging schedule, adapting to individual conditions in a house, such as solar radiation (‘yield’) throughout the day, and electricity consumption patterns. But it will also automatically adjust for any drastic deviations from this learned behaviour.
Battery or accumulator?
Originally, non-rechargeable storage devices for electrical energy were called batteries (“primary cells” or “primary elements”), while rechargeable storage devices (“secondary cells” or “secondary elements”) were called accumulators. These terms have blurred in meaning over the years, the most prominent example being the “car battery”, which was originally constructed as an accumulator.
On closer inspection, the MyReserve device is a lithium-ion accumulator, but it usually referred to as a lithium-ion battery.
MyReserve: Grid-supporting storage contributes to the energy revolution
SOLARWATT advanced batteries adjust performance for maximum efficiency, avoiding aging due to chemical stress, resulting in as much as 3,000 kWh extra energy stored over a battery’s entire lifetime. That’s money saved.
The ‘self-learning’ battery uses solar radiation, temperature, and atmospheric conditions to predict the amount of electricity that solar panels will generate – precisely and location-specifically.
Example of ideal charging process.
That’s another factor in achieving 3,000 kWh more solar power stored, significantly reducing cost per stored kWh compared to other batteries.
While conventional batteries are typically full at midday peak, so that excess solar energy feeds directly into the grid, the most innovative batteries can still absorb energy at this time. In this way, intelligent charging relieves the grid, reducing the need for its expansion and helping to stabilise electricity supply to support the energy revolution.
Why do lithium-ion batteries “age”?
All batteries “age” over time, i.e. they become less efficient. This is caused by changes in the cell’s electrodes due to chemical processes. This aging process is, among other things, accelerated by a high state of charge.
* Neal is Sales Manager, UK (South)