© 2021 by XOLTA
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2 INTRODUCTION:
2.1 About the XOLTA Compact BAT-5 and BAT-10
The BAT-5 and BAT-10 are Battery Energy Storage Systems (BESS) for residential or commercial use. With
nominal capacities of 5 and 10 kWh (usable 4.5 and 9kWh) respectively the batteries can be used with
smaller solar / photovoltaic (PV) installations. The batteries consist of lithium iron phosphate (LFP) based
lithium-ion battery cells as well as an integrated battery inverter.
The XOLTA Compact BESS is an AC-coupled battery designed for connection to single or three phase 230V
AC 50Hz electrical grids. It is designed to store electricity generated from solar panels in the lithium-Ion
battery and later convert stored energy back to alternating current (AC) electricity and feed this into the
power grid.
The all-in-one batteries work with any kind of solar installation or any other renewable energy source and
are connected directly to the electrical panel of the building. They are designed for both indoor and outdoor
installation and to withstand cold and heat.
The batteries come with 24/7/365 monitoring to ensure optimal performance. Production and consumption
figures and savings per day/month/year/lifetime can be seen in the XOLTA web app.
2.2 XOLTA Compact BESS benefits
The XOLTA BAT-5 XOLTA BAT-5 and BAT-10 are scalable battery energy storage systems designed for
residential and commercial use. The batteries are an essential enabler for the transition to renewable energy by
balancing out volatile energy production with consumption. The high energy density means little space is
required on an outside wall to store sufficient electricity to power building consumption during peak tariff hours.
High performance is assured by 24/7 monitoring via an Internet connection which allows external data such
as weather forecasts and anticipated demand for electricity to be used to optimize performance. The battery
systems connect to XOLTA’s intelligent cloud service and can be monitored using a web app (see Chapter 5).
2.3 Maximizing consumption of solar power
Solar power is often generated at different times of the day from when power is required. XOLTA batteries
store the excess solar energy generated during the daytime and release it again later when it is needed – for
example after sunset.
Put simply, there are two scenarios:
1. When your solar panels are generating enough electricity for your own needs, or more than you need at
that moment in time:
a. Solar power goes to your immediate own consumption.
b. Any excess solar power which you do not use is stored in the battery.
c. Once the battery is full, you can sell solar power to the grid.
2. When your solar panels are not generating enough electricity for your own needs:
a. The system draws power previously stored in the battery.
b. If the battery becomes empty, the system draws power from the grid.
This is called time-shifting – where you store excess electricity for later use. See figure 2.1.
