Lunar Battery Anchorage — California
Prepared by AOstructures Inc. — February 26, 2026
Scope of Work
AOstructures, Inc. provided the structural anchorage design for the Lunar LFP Battery System. The installation method consists of a Lunar Battery System fully hung from an existing wall. Compatible wall types include:
Wood framed wall with typical 2x4 (minimum) studs at 16" o.c.
Wood framed wall with atypical 2x4 (minimum) stud spacing
Concrete wall, 6" minimum thickness with f'c = 2,500 psi minimum
CMU wall, fully grouted, normal weight CMU
The wall anchorage is designed to resist both the dead weight (downward load) of the equipment as well as vertical and lateral seismic forces.
ESS Description
The battery system consists of a modular design including (1) inverter and can include as few as (2) battery blocks (10kWh ESS) and as many as (6) battery blocks (30kWh ESS). Each modular element is attached to a wall mounting bracket provided by the manufacturer. The bottom wall mounting bracket is fastened to the wall using (4) fasteners, with additional modular elements above clipped to the bracket below and fastened using (2) additional fasteners. For the 10kWh ESS: (8) fasteners total; for the 30kWh ESS: (16) fasteners total.
Design Criteria
Applicable Codes: 2025 CBC, ASCE 7-22
Risk Category II
Seismic: Sds = 2g, Ip = 1, Rµ = 1.3, Car = 1, Rpo = 1.5
Equipment Specifications
(1) Lunar LFP Battery System (30kWh max) — weighing no more than 778 lb
All equipment shall be installed per manufacturer specifications
Source document: https://documents.lunarenergy.com/lunar-battery-anchorage-letter