ANMA System Building

Identity

category	batteries
ean	UNKNOWN
generation	MAX
manufacturer	Fortress Power
market_version	US
model	eVault MAX 18.5 kWh
mpn	UNKNOWN
product_family	eVault / eVault MAX
product_revision	UNKNOWN
product_status	active
region	NA (US)
release_year	UNKNOWN
sku	UNKNOWN

Electrical

bms_architecture	{'type': 'integrated BMS per cabinet; Battery ID 0 for a single unit, IDs 1-20 in parallel', 'separate_master_bmu_required': False, 'modules_per_stack': 'N/A (single self-contained cabinet)', 'max_parallel_groups': '20 units, 370 kWh total'}
chemistry	LFP (LiFePO4) - 'Tier 1 Automotive Prismatic - LiFePO4'
communication_can	True
communication_rs485	True
firmware_requirements	UNKNOWN (installation manual references per-inverter firmware versions for SMA and Victron without giving numbers)
max_continuous_charge_current_a	180 eVault MAX 18.5 Lithium Battery Storage - technical datasheet — datasheet, 'Maximum Charge Current 180A' (recommended 150A)
max_continuous_discharge_current_a	180 eVault MAX 18.5 Lithium Battery Storage - technical datasheet — datasheet, 'Recommended Continuous Discharge 180A (9.2 kW)'
max_continuous_power_kw	9.2
max_parallel_units	20
max_series_units	N/A (LV parallel only)
min_series_units_hv	N/A
nominal_energy_kwh	18.5
nominal_voltage_v	51.2
officially_supported_inverter_brands	['Fortress Power', 'Schneider Electric', 'OutBack Power', 'Sol-Ark', 'Studer Innotec', 'Magnum/Sensata', 'Victron Energy', 'Hoymiles', 'EG4', 'SMA', 'Midnite Solar', 'Morningstar', 'Phocos', 'Growatt', 'LuxPower']
officially_supported_inverter_models	['Fortress ENVY 8kW / 10kW / 12kW / Duo 21 (AC or DC coupled)', 'Fortress Solo 6.5K (AC or DC coupled)', 'Fortress EdgeOn Duo 9 / Duo 15 (AC or DC coupled)', 'Schneider Electric XW Pro 6848, XW+ 6848, XW+ 5548, SW 4048 (AC or DC coupled)', 'OutBack Power Radian 8048A, Radian 4048A, SkyBox SBX 5048, VFXR 3648A, FXR 3048A', 'Sol-Ark 5K, 8K, 12K, 15K, 18K', 'Studer Innotec AJ 400-48, AJ 700-48, XTS series 1400-8000-48', 'Magnum/Sensata MS 4448, MS 4048', 'Victron Energy Quattro 48V series, MultiPlus models (DC coupled)', 'HOYMILES HAS-3.8LV-USG1 through HAS-11.5LV-USG1', 'EG4 12kPV, 18kPV, FlexBOSS18, FlexBOSS21', 'LuxPower 12k (per installation manual)'] Battery Inverter Compatibility Guide — Battery Inverter Compatibility Guide, eVault MAX 18.5 column
peak_current_a	230 A (12 kW) for 30 min; 250 A (12.8 kW) surge for 5 s (datasheet) / 'Max. Pulse Current (for 10 sec) 250 A' (brochure) - see data_conflicts eVault MAX 18.5 Lithium Battery Storage - technical datasheet — datasheet, 'Peak Discharge Rate 230A (12 kW, 30 min)'; 'Maximum Surge Power 250A (12.8 kW, 5 sec)'
supported_inverter_protocols	["CAN / RS485 (datasheet 'Protocol: CAN/RS485')", 'Communication Box carries five ports: inverter RS-485, inverter CAN, battery parallel communication and USB logging', 'Closed-loop communication is recommended but not required - the battery will also run open-loop']
usable_energy_kwh	18.43 (rated capacity @0.5C); DoD up to 100%
voltage_class	LV
voltage_range_v	46-56

Physical / mechanical

depth_mm	515
enclosure_material	Industrial Grade Aluminum
height_mm	1073
housing_color	UNKNOWN
mounting_bolt_size	two 3/8 in. (M10) threaded terminals with lock washer and nut
mounting_type	['floor']
rack_units	N/A (free-standing cabinet)
shipping_weight_kg	UNKNOWN
terminal_locations	top-access serviceable design; communication box with five ports next to the battery breaker
torque_specs	installation manual: 'Recommended terminal torque is 10.0-19.1 N.m (7.4-14.1 ft.lb)'; datasheet states 7.0-7.7 N.m - see data_conflicts Fortress Power eVault MAX Installation Manual — installation manual, terminal torque section
weight_kg	235.87
width_mm	515

Installation

cable_requirements	copper cable from 2/0 AWG for runs under 10 ft
clearance_back_mm	51 (2 in.) between the battery pack and the wall
clearance_left_mm	25 minimum (1 in. per UL9540A large-scale fire testing); 127 (5 in.) recommended between units
clearance_right_mm	25 minimum; 127 recommended
indoor_outdoor	IP55 rated
installation_temperature_range_c	do not charge below 0 C (32 F); optimal ambient 15-35 C (59-95 F)
lifetime_temperature_limit	do not operate at an average temperature exceeding 30 C / 86 F over the life of the battery
max_installation_altitude_m	UNKNOWN
mounting_orientation	upright, floor standing ('do not transport battery upside down')

Environment

charge_temperature_c	0 to +49 (32 F to 120 F)
cooling_method	UNKNOWN
discharge_temperature_c	-20 to +60 (-4 F to 140 F)
ip_rating	IP55
max_altitude_m	UNKNOWN
relative_humidity	5%-75%
storage_temperature_c	UNKNOWN (store out of direct sunlight)

Interfaces & connectors

battery_terminal_type	M10 (3/8 in.) threaded studs, ring terminals 1/2 in. or larger
can	yes (inverter CAN port on the communication box)
protocol_notes	Battery ID must be 0 for a single unit; IDs 1-20 for parallel systems.
rs485	yes (inverter RS-485 port on the communication box)
usb	yes - USB logging port

Protection

bms_charge_disconnect	>56 V
cell_balancing	UNKNOWN
integrated_breakers_fuses	250 A DC battery breaker integrated in the communication box Fortress Power eVault MAX Installation Manual — installation manual, '250A breaker'
over_current	over current protection for discharge via thermal control
over_temperature	yes
over_voltage	Over Voltage Fault 58.4 +/- 0.4 V; recovery 54.0 +/- 0.4 V
short_circuit	yes
under_voltage	Low Voltage Fault 43.2 +/- 0.4 V; recovery 43.2 +/- 0.4 V; battery low voltage protection <46 V, recovery 47 V

Certifications

emc	[]
note	'The eVault MAX has been listed to UL9540 standards as a DC ESS... It has passed the UL9540a large-scale fire testing.'
other	['CEC', 'SGIP']
regional	[]
safety	['UL 1642', 'UL 1973', 'UL 9540', 'UL 9540A']
transport	[]

Warranty & service

conditions	10 years with unlimited partial cycles
cycle_life	8,000 cycles @ 80% DoD
design_life_years	UNKNOWN
round_trip_efficiency	>98% (brochure) / 98% @0.5C (datasheet)
standard_years	10

Packaging & logistics

gross_weight_kg	UNKNOWN (unit weight 235.87 kg / 520 lbs)
transport_restrictions	UNKNOWN in the fetched documents; the manual requires end-of-life batteries to be transported at 30% state of charge, <52 V resting

Documents

compatibility-list Battery Inverter Compatibility Guide rev UNKNOWN

datasheet eVault MAX 18.5 Lithium Battery Storage - technical datasheet rev UNKNOWN

datasheet eVault MAX 18.5 kWh product page rev UNKNOWN

datasheet eVault Max 18.5 brochure rev UNKNOWN

installation-manual Fortress Power eVault MAX Installation Manual rev UNKNOWN

Recorded conflicts

peak_current_a Review required

250 A / 12.8 kW for 5 seconds — technical datasheet, 'Maximum Surge Power'

250 A for 10 seconds — brochure, 'Max. Pulse Current (for 10 sec) [A] 250'

brochure and datasheet state different surge durations

physical.torque_specs Review required

7.0-7.7 N.m — eVault MAX 18.5 technical datasheet

10.0-19.1 N.m (7.4-14.1 ft.lb) — Fortress Power eVault MAX Installation Manual (2023-01)

datasheet and installation manual disagree; the installation manual is the later and more specific document. SAFETY-RELEVANT - installers should follow the installation manual.