Regions · United States
Mobile battery storage for US jobsites
Our published product data describes an IEC variant. For a US project the first job is to confirm the right product variant, its certification evidence and the local approval path, before anyone talks about sizing.
Enquiries welcome; the applicable product variant, local approval path, supply and service are confirmed for each project before anything is proposed.
What the published data covers
The two systems in our current range are documented in IEC brochures. Those brochures specify a 380 to 415 V supply, three-phase with neutral and earth. The frequency line lists both 50 and 60 Hz.
That 60 Hz entry is not evidence of a North American variant. US jobsites commonly distribute at 480 V or 208 V three-phase, and neither sits inside the documented range. We do not carry the IEC table across to a US project. Before anything is proposed, the applicable product variant and its own data sheet are confirmed with the supply partner. If no suitable variant can be supplied for your project, we will tell you so.
Source: Ampd 200 IEC brochure, Rev 1.3, dated 29 April 2026; Ampd 400 IEC brochure, Rev 1.3, dated 29 April 2026. Manufacturer-published figures for the IEC variant, not independently tested. Specifications can change, so the current data sheet for your territory is confirmed in a project proposal.
UL 9540 and UL 9540A are different things
These two labels are often run together. They should not be.
- UL 9540 is the safety standard for energy storage systems and equipment. A product certified to it has been evaluated as a complete system. See UL’s overview of energy storage system certification.
- UL 9540A is a test method for evaluating thermal runaway fire propagation. It can be run at cell, module, unit or installation level, and it produces test data. It is not a certification.
The brochures we hold list UL 9540A at cell level only. They do not list UL 9540 system certification. Neither phrase, on its own, establishes that a particular unit will be accepted on a particular site.
Approval is local
Acceptance of a battery system on a jobsite is decided by the authority having jurisdiction (AHJ), typically the local building or fire official. What an AHJ asks for varies by state and municipality, and a temporary installation is not always treated the same way as a permanent one. The practical step is to ask the AHJ, or your electrical contractor, what they will require for a temporary energy storage system, and to include the answer in your brief.
Where storage fits on a US jobsite
The applications are the same as anywhere else: tower cranes and hoists with short, high peaks; temporary power where a generator runs all day for an uneven load; and sites where utility service is smaller than the peak demand. Office trailers are a different case. The units in our current range are large industrial systems, so smaller loads are assessed first, before any system is suggested.
What to send for a US project
- State, city or county, and the AHJ if you know it
- Site voltage, phase and frequency
- What the AHJ or your electrical contractor has said they will require
- What needs power, and the service or generator on site today
- Working hours, start date and expected duration
- Whether you expect to rent or buy
“Not sure” is fine for the technical items. Get a site power proposal: the review starts with variant and approval questions, and availability, delivery and service are confirmed for your project rather than assumed.
Product figures on this page: Ampd 200 Brochure IEC Rev 1.3, dated April 29, 2026; Ampd 400 Brochure IEC Rev 1.3, dated April 29, 2026. Manufacturer-published, not independently tested.
Questions buyers ask
Do the published specifications apply to a US jobsite?
Not automatically. The reference data covers an IEC variant rated for 380 to 415 V three-phase. Its frequency line includes 60 Hz, but that does not establish a variant for common US jobsite voltages. For a US project, the applicable variant and its documentation are confirmed before any system is proposed.
What is the difference between UL 9540 and UL 9540A?
UL 9540 is a safety standard under which an energy storage system can be certified as a system. UL 9540A is a test method that evaluates thermal runaway fire propagation and produces test data; it is not a system certification. A product can have UL 9540A test data at cell level without being certified to UL 9540.
Who approves a battery system on a US construction site?
The local authority having jurisdiction, usually the building or fire official for the area, decides what is acceptable. Requirements differ between states and municipalities. Ask early what they will want to see for a temporary battery system, and include the answer in your project brief.