A Watters Contracts division
Commercial Battery Storage
Store energy for use when it is more valuable to your operation. WattSolar assesses battery storage against your demand profile, on-site generation, tariffs, electrical infrastructure and clearly defined resilience objectives.
A battery should solve a defined site problem
Battery storage is not an automatic addition to every solar project. Its value depends on when the site generates and uses electricity, the applicable tariff, demand peaks, available capacity and whether resilience is a genuine operational requirement.
What we assess
A practical recommendation begins with evidence from the premises, energy use and operating requirements.
- Interval consumption and generation data
- Tariffs and the timing of site demand
- Existing electrical capacity and connection arrangements
- Battery location, access, ventilation and safety requirements
- Control strategy, monitoring and integration with solar or EV charging
- The exact loads and operating requirement where backup is being considered
A coordinated route to delivery
Define
Agree the operational and commercial problem the battery is intended to address.
Analyse
Review consumption, generation, tariffs, peaks and site constraints.
Design
Develop a suitable capacity, control approach and integration scope.
Deliver
Coordinate installation, protection, testing and commissioning.
Review
Provide monitoring guidance and compare operation with the agreed strategy.
Frequently asked questions
Can a commercial battery be installed without solar panels?
Potentially. The case depends on the tariff, load profile, demand peaks, connection constraints and intended operating strategy. It should be assessed as a separate project rather than assumed to be beneficial.
How is battery capacity selected?
Capacity should be based on time-based demand and generation data, the intended use case, power requirements, available space and future plans. Annual totals alone are rarely enough.
Will a battery power the building during an outage?
Not by default. Backup operation requires a system designed for the selected loads, changeover or islanding arrangements, protection and the applicable permissions. This requirement must be defined at the start.
How long does a commercial battery last?
Service life depends on the selected product, operating temperature, charge cycles, depth of discharge and control strategy. Product and workmanship warranty details should be confirmed for the final design.
Can battery storage work with EV charging?
It can be considered as part of a coordinated site-energy design. Suitability depends on charging schedules, available capacity, tariffs and the site's wider demand profile.
Define the use case before choosing a battery
Tell WattSolar about your energy profile, solar generation, tariff and operational priorities so the team can assess whether storage is appropriate.
Discuss battery storage for your site