Force 15K User manual

FORCE 15K USER MANUAL 1
48V
Walrus
USER MANUAL
INSTALLATION GUIDE
FORCE 15K
User Manual
Last Updated: January 2024

Disclaimer
FORCE 15K USER MANUAL
Before utilizing this product, carefully peruse this user manual to
ensure a comprehensive understanding of the product and its
proper usage. Retain this manual for future reference after
thorough reading. Failure to adhere to the guidelines outlined in
this manual may result in severe injury to yourself or others, as
well as potential product damage and property loss. By using this
product, you acknowledge and accept all terms and content
presented in this document.
Mammoth RE disclaims any responsibility for losses incurred due
to the user's non-compliance with the guidelines provided in this
user manual.
In accordance with applicable laws and regulations, Mammoth
RE retains the right to the ultimate interpretation of this
document and all associated materials related to this product.
This document is subject to modifications (updates, revisions, or
termination) without prior notification. For the latest product
information, please refer to Mammoth RE official website.

FORCE 15K USER MANUAL
Table of
Contents
1. Product Introduction 4
2. Product Specifications 5
3. Product Overview 6
What’s Included
Weight & Dimensions
Hardware Parts
Internal Functions
4. Connection Overview 10
PV Wiring Setup
Custom Kits Wiring Setup
5. Technical Safety Guidelines 14
6. Installation 14
Parts & Components
7. Warranty & Returns Information 15
8. Warnings & Precautions 16
9. Storage Information 17
Frequently Asked Questions & Answers

Product Introduction
FORCE 15K USER MANUAL
The Force 15K takes everything there is to love about power stations
and obliterated the issues: limited capacity, restrained power output,
and unnecessary complexity. Unlike other units that claim to power
your entire house with one unit but fall short in reality, the FORCE 15K
is here to close that gap.
With a whopping 15,000Wh lithium battery, 8,000W 120/240V Inverter
and up to 4,000W of Solar Input - The Force 15K gives you all the power
you need.

Product Specifications
2.1 Weight & Dimensions
2.2 Specifications
Parameter Specification Unit
Height 39.4 in
Width 15 in
Depth 24.4 in
Weight 395 lbs
DESCRIPTION SPECIFICATION
MODEL # FORCE 15K 0813-72N
INVERTER POWER (KW) 8kW
BATTERY CAPACITY (KWh) 15kWh
DIMENSION L:620mm / W: 380mm / H:1000mm
L:24.4in / W: 15in / H:39.4in
WEIGHT 179kg / 395 lbs
PV IN CONNECTOR: BE175 to MC4
PV INPUT VOLTAGE: 90VDC-230VDC (Open Circuit Voltage)
PV INPUT MAX CURRENT: 80 Amps (4.5KW)
PV CHARGING VOLTAGE: < 83VDC
DC PORT INPUT VOLTAGE RANGE
(FOR BATTERY PARALLEL)
AC OUTPUT BREAKER CAPACITY
AC INPUT BREAKER CAPACITY 63 Amps
AC INPUT VOLTAGE RANGE: 160VAC to 260VAC（UPS Mode)
(2 Hot Wire , 1 Neutral Wire , 1 Ground)
AC INPUT CONNECTOR (ON THE SIDE) NEMA SS2-50P
(120VAC/240VAC , 50Amp)
AC OUTPUT RECEPTACLE (ON THE SIDE) NEMA 14-50R (120VAC/240VAC , 50Amp)
AC OUTPUT RECEPTACLE
(ON FRONT PANEL)
4 x 120V Receptacle , 1x L14-30R
(120VAC/240VAC , 30Amp)
USB PORT USB-C / USB
COMMUNICATION PORT 2 x RS485,
1 x Generator Kick Off Port , WiFi
FORCE 15K USER MANUAL
2

FORCE 15K USER MANUAL
Product Overview
3.1 What’s Included?
3

FORCE 15K USER MANUAL
Product Overview
3.2 Weight and Dimensions
3

FORCE 15K USER MANUAL
Product Overview
3.3 Hardware Parts
3

PV input
(red&black)
MPPT Output
(Red&Black)
Fan #1,#2 Data line #1
Data line #2
DC in
AC in L1 Red
AC in L2 Black
MPPT Control
Wifi
AC In L1 Red
AC In L2 Black
AC Out L1 Red
AC Out L2 Black
AC Out N White
L1 Red
L2 Black
N White
FORCE 15K USER MANUAL
Product Overview
3.4 Internal Functions
3

FORCE 15K USER MANUAL
Connection Overview
4.1 PV Wiring Connection:
4
Important Notes:
●The output wires from solar
panels typically comes in black
color. It is crucial to ensure a
proper connection by matching
the correct polarities.
●Positive wire of the PV module
is the Male Connector. You can
check the markings on the
connector itself to ensure
proper connection.
●PV input should not exceed 5
pcs of 400W panels connected
in series. (shown as “n”)
●Use RED extension cable for
positive connection and BLACK
for negative connection to
avoid confusion. Check the
diagrams for visualization.

FORCE 15K USER MANUAL
Connection Overview
4.11 Custom Kits Wiring Setup:
QUAD KIT (4 Series, 1 String)
4

FORCE 15K USER MANUAL
Connection Overview
4.11 Custom Kits Wiring Setup:
HEX KIT (3 Series, 2 Parallel)
4

FORCE 15K USER MANUAL
Connection Overview
4.11 Custom Kits Wiring Setup:
PLATINUM KIT (5 Series, 2 Parallel)
4

WARNING: Before installing, make sure to review all safety
guidelines, warnings, and precautions.
6.1 Parts & Components
See website for most up to date parts and components list for your
package - https://shopsolarkits.com/products/force-15k
WARNING: Before installing or operating battery, make sure to
review all safety guidelines, warnings, and precautions.
Ensure that operating environment temperature are are strictly
followed as specified in the user manual. If the temperature is
either too high or too low, it may result in a fire or explosion;
performance will be reduced; or the product itself may cease to
work.
The maximum voltage, wattage and current should not be
exceeded in any way when connecting components towards the
Force 15K.
Don’t install battery in a location exposed to direct sun. Don’t
charge with a charge voltage above 60V. Don’t charge battery
when temperature is under
-4°F (-20°C). Don’t discharge battery when temperature is under
-31°F (-35°C). Don’t charge or discharge battery when
temperature is above 145°F (65° C). Don’t charge to 53V or above
before storing battery for more than 6 months.
Technical Safety Guidelines
5
Installation
6
FORCE 15K USER MANUAL

FORCE 15K USER MANUAL
Warranty and Returns Information
7
In the unlikely event you are having an issue with one of our batteries we have
developed a straightforward warranty & return policy:
For all returns or warranty claims contact [email protected].
• 30-day money back guarantee. Returns of undamaged batteries unrelated to
warranty claims may be issued full refunds less a 20% restocking fee.
• We have a comprehensive 10-year warranty on all new batteries.
» Our batteries are built to last. We stand by our engineering
and our quality. If we made a mistake or there is a defect in the build
of your battery, we will fix it or fully replace it.
» Mammoth RE offers a 10-year manufacturer's defect
warranty from the date of purchase. The average lifespan of a Force
15K battery at 100% Depth of Discharge is between 1,000 – 3,000
recharge cycles depending on chemistry, or roughly 5 to 10 years
with standard use (see the specifications of the battery for more
information on what standard use would be). This warranty does not
cover negligence or misuse of the battery or the normal wear and
tear. If it is deemed that the battery was used improperly, you will be
subject to a $150 an hour repair charge plus parts and shipping.
» To submit a warranty claim, please contact us directly at
[email protected]. The battery may be required to be shipped
back to our Mammoth RE warehouse in Chatsworth, California for
further inspection.
• We offer a 30-day warranty on all cells, accessories & complimentary
products (Anderson connectors, wiring, etc.).
• Free lifetime technical support & troubleshooting.
• Warranty only applies to original owner (non-transferable).
• Warranties can be used for an exchange of a component only once per
component.
• Customer pays return shipping on returns or warrantied component
inspections initiated after the first 30 days of ownership. Please note some
battery returns may require special documentation and packaging, and these
instances will encounter extra fees. This is to correctly comply with lithium
battery shipping regulations.
• If you have a quality issue with a product, please contact our support team
to help properly diagnose the problem. If the product you receive does not
meet our rigorous quality standards, then we will issue you a replacement
component or fix the original at no additional cost. Replacement batteries or
components will only be sent after we have received your returned battery or
component and finished an inspection to determine the cause of any
problems. Mammoth RE is not responsible for return shipping.
• DIY modifications or damage due to gross negligence or abuse are not
covered by the warranty.

FORCE 15K USER MANUAL
Warranty and Returns Information
7
For all returns, please mail your package in a traceable method to the address
below. Include a note with your name, your order number and describing your
situation and/or request:
ShopSolar.com
Technical Support Team
9667 Owensmouth Ave.
Chatsworth, California
91311
Warnings and Precautions
8
Lithium Iron Phosphate (LiFePO4) batteries are an inherently safe chemistry.
However, as with any electronics, safety measures should always be taken.
Please adhere to the instructions within this manual for safe handling and
operation.
• Always wear protective gear when handling batteries
• Use a wrench with a rubber coated handle
• Do not place any objects on top of batteries
• Do not place batteries on a metallic surface
• Check that all cables are in good condition
• Make sure all cable connections are properly tightened
• Install and remove batteries using the handles provided
• Do not smoke near batteries
• Do not install batteries in a zero-clearance compartment, overheating may
result. Always leave at least 4” of space around all sides and top of battery
• Keep any flammable/combustible material (e.g., paper, cloth, plastic, etc.)
that may be ignited by heat, sparks, or flames at a minimum distance of two
feet away from the batteries
• Battery compartment and any material within two feet should be
noncombustible.
• Keep sparks, flames, and metal objects away from batteries
• Have a Class ABC fire extinguisher on the premises

FORCE 15K USER MANUAL
Warnings and Precautions
8
• Do not disassemble or attempt to repair the solar generator.
• Ensure that operating environment temperature are are strictly followed as
specified in the user manual. If the temperature is either too high or too low,
it may result in a fire or explosion; performance will be reduced; or the
product itself may cease to work.
• The maximum voltage, wattage and current should not be exceeded as per
specified.
• Verify first the solar panel’s specifications and the generator's solar input
before trying to add more equipment. Seek a professional when in doubt.
• Make sure the accessories used are for the specific products or brand only.
Do not mix and match accessories. If you need to replace any components
or accessories, please refer to the user manual or the website to check
relevant information.
• Do not expose the unit to direct heat, rain, moisture, snow, or liquids of any
type
Storage Information
9
Ideal Operating Conditions:
• Store the solar generator in an environment with temperatures ranging
between 20°C ~ 30°C (68°F ~ 86°F).
• Keep the generator away from water, intense heat, and sharp objects.
• Avoid storing in places with temperatures exceeding 45°C (113°F) or falling
below -10°C (14°F) to ensure an extended product lifespan.
Long-Term Storage Guidelines:
• For extended periods of storage, discharge the solar generator every three
months.
• If the product is not charged or discharged for more than 6 months, it will not
be covered by the warranty.

FORCE 15K USER MANUAL
AC Bypass?
Yes. When the power grid is functioning normally, the inverter operates
normally and is in bypass mode. It uses the electricity from the grid for
power supply and to charge the battery. When the power grid fails, the
inverter will automatically switch to battery supply. This process requires no
manual intervention.
How do I know if the product is charging?
The indicator light beside CHARGE should turn on.
How do I connect the FORCE 15K to my home panel?
A sub-panel is required when connecting to your electrical home panel.
Seek a professional when doing hard-wire installation. When choosing
essential loads for your sub-panel, make certain that the combined load
capacity, when utilized concurrently, remains within the specifications of the
solar generator. Consult a professional for proper computation and
recommendations.
Can this back-feed to my grid?
No.
Is the Force 15k UL Listed?
The Force 15K is not UL Listed as this is not required for off-grid
applications, portable power stations and solar generators. You will not be
selling excess power back to the grid with a unit like this, you will be
securing your energy independence and investing in a clean, quiet, reliable
source of power for years to come.
How many cells does the battery have?
16 cells connected in series with a single cell voltage of 3.2V each for 48V
system.
What is the battery chemistry?
LiFePO4
Frequently Asked Questions (FAQ)

FORCE 15K USER MANUAL
How does the warranty work?
Each unit is backed by a standard 10-year manufacturer warranty from the
date of shipment. The average lifespan of a lithium battery at 90% Depth of
Discharge is between 3,000 – 6,000 lifecycles or roughly 5 to 10 years of
standard daily use (many more years if used only in backup and
recreational situations).
This warranty does not cover negligence or misuse of the battery or the
normal wear and tear. If it is deemed that the battery was used improperly,
you may be subject to a $150 an hour repair charge plus parts and shipping.
To submit a warranty claim, please contact us directly at
[email protected]. The battery may be required to be shipped
back to one of our US warehouse locations for further inspection.
How heavy is the unit?
The unit weighs a total of 395 lbs, however to make moving it easier, we
have designed a 2-piece system where you can remove the top inverter
portion from the bottom battery portion.
The top weighs approximately 165 lbs, the bottom piece weighs 230 lbs and
has wheels for easy maneuverability.
How does the top connect to the bottom?
The top and bottom are held together with screw-on plates on either side of
the unit and connect via a standard SB175 cable which you can see in the
product images.
How quickly can it recharge?
You can recharge the unit from 0-100% with up to 4,000W of solar panels in
approximately 4 hours. You can also use both 240V and 120V AC power to
recharge the unit.
240V power will recharge the unit much faster than the 120V wall charger
included with your order, but we highly recommend “slow” charging the unit
from AC power whenever possible to preserve the longevity of the battery.
You can recharge the unit from solar and AC power at the same time.
Frequently Asked Questions (FAQ)

FORCE 15K USER MANUAL
What is the continuous AC output?
The continuous AC output of the unit is 8,000W at either 120V or 240V.
Most appliances you will be running are 120V however things like well
pumps, dryers, and some larger AC units require 240V output which the
Force 15K can easily handle.
How quiet is the Force 15K?
The FORCE 15K Solar Power Station operates at an impressive 50 decibels
during both standard operation and charging, ensuring a remarkably quiet
environment. Multiple decibel rating reports reveals that, even at peak
output, it maintains a range of 75-85 decibels—very comparable to the quiet
performance of many solar generators and power stations on the market
today.
How long is the surge capacity?
16,000W surge will last for upto 5 seconds, typically to accommodate the
momentary increase in power required for starting electrical appliances.
Energy Saving Mode - how does it function?
In energy-saving mode, when there is no load, the inverter will be in standby
mode. It will consume only 10% of the power used in normal mode until it
detects the connection of an appliance. In normal mode, the inverter will
remain active
Can I select charging priority?
Yes, the you can configure this in “Priority” on the unit menu.
In solar mode, only solar energy will charge the battery, and AC will not
charge the battery.
In AC mode, both solar and AC will work together until the battery is 100%.
In ATC mode, you can set the time for AC to charge the battery, and also set
times when the grid power does not participate, relying solely on battery
power (typically used to avoid peak electricity prices).
Frequently Asked Questions (FAQ)