Kratos lithium system?

New to renewable energy? Have questions? Here's a great place to ask them and view information about wind and solar power basics.

Kratos lithium system?

Postby Jet » Sat Aug 25, 2018 11:06 pm

Hi all,
Newbie here looking for some advice from the experts on this site regarding this system I found advertised.
I am looking for an off grid system for a new house we have just started building and came across this system, would this be any good for our needs? it’s apparently only 3 months old. We currently use an average of 21 units per day in our current abode but are downsizing and reckon we can get by on between 12-15 units per day.
Are these systems value for money? Are the specs accurate? I plan on adding 9kw of solar panel as there is plenty of space. If using around 15 units per day, how do you calculate battery size?
Any advice would be appreciated.
Here is the system advertised:-
OFF GRID SYSTEM BYD LITHIUM SOLAR BATTERY 20KWH trailer gen
$20,000
TRAILER 6X4 FULLY ENCLOSED GALVENISED WITH SPARE TYRE
with AS NEW
6 KVA DIESEL GENERATOR
8 X 250KWH BYD BATTERIES IN TWO CABINET
KRATOS LITHIUM SOLAR BATTERY
Victron Color Control GX
Victron Inverter Interface MK3-USB for VE.Bus
Victron Quattro Inverter-Charger: 48V-5000VA Inverter, 70A Charger
PETROL Digital Inverter singl Generator rated 3.3KVA Max with remote start
THIS SET UP WAS TO LIVE OFF GRID FOR THE NEXT 30 YRS WITHOUT ANY STRESS AT ALL, YOU CAN ADD SOLAR HOWEVER I DECIDED THAT ONE TANK OF DIESEL WOULD FULLY CHARGE THE BATTERIES FOR 3 DAYS USE. AND AS I WAS TRAVELING IT WAS AN EASIER SET UP IN SAYING THAT YOU COULD PUT 3 0R 4 KW SOLAR PANELS ON THE VAN ROOF WITH THE.
COMES WITH 3 X 20L DIESEL GERRY CANS AND 1X20L PETROL CAN.
The Kratos battery bank is made of a specially designed cabinet fitted with up to 4x 2.5kWh battery modules, and up to 8 cabinets fitted with 4 modules each are able to be connected together. The battery modules are rated to 6000 cycles to 96% Depth Of Discharge (otherwise called DoD). These modules can be added at any time to expand the capacity of the system. They have a constant power rating equal to their capacity – 2.5kW each – making them very suitable for off grid and high demand applications. For example, a 5kWh battery bank can deliver up to 5kW constant power output. Many lithium battery types are limited to much lower constant power ratings.The battery bank can be expanded up to 80kWh total capacity (32x modules in 8 cabinets) .
Key Specifications:
Nominal Voltage – 51.2v – suitable for 48v systems
Total capacity per battery module – 2.5kWh
Usable energy per module – 2.4kWh
Maximum output power per module – 2.5kW
Cycle life per module – >6000 cycles
Expand-ability – up to 80kWh total, adding modules and cabinets as necessary at any time
Victron MultiPlus 48/5000/70-100
With our extensive range of MultiPlus inverter/chargers from Victron, you’ll be sure to find the right machine for any job. Designed with perfection in mind whilst remaining cost effective, the MultiPlus range is packed with features to suit your needs.
This quality Victron Inverter-Charger can also draw an extra 100 amps of current from an external AC power source when required.

FEATURES
Multi-functional
The MultiPlus is a powerful true sine wave inverter, a sophisticated battery charger that features adaptive charge technology and a high-speed AC transfer switch in a single compact enclosure. Models range from 800VA to 5000VA per module.
Unique PowerAssist feature
The MultiPlus will prevent overload of a limited AC source. First, battery charging will automatically be reduced when otherwise an overload would occur. The second level will boost the output of a generator or shore side supply with power taken from the battery.
Uninterrupted AC power (UPS function)
In the event of a grid failure or shore or generator power being disconnected, the inverter within the Multi is automatically activated and takes over the supply to the connected loads. This happens so fast (less than 20 milliseconds) that computers and other electronic equipment will continue to operate without disruption.

Virtually unlimited power thanks to parallel operation

Up to 6 Multis can operate in parallel to achieve higher power output. Three phase or split phase operation is also possible. Please check our datasheets to see which models have paralleling, three phase and split phase capabilities.
VICTRON INVERTER INTERFACE MK3-USB FOR VE.BUS
VICTRON COLOR CONTROL GX
Color Control GX
DIGITAL INVERTER GENERATOR 2.6KW RATED 3.3KVA MAX WITH REMOTE START
Jet
Solar Supporter
Solar Supporter
 
Posts: 5
Joined: Sat Aug 25, 2018 10:40 pm

Re: Kratos lithium system?

Postby Gordon-Loomberah » Sun Aug 26, 2018 10:04 am

Welcome to the Energy Matters Forums Jet :)

Is there a reason given for selling the system after only 3 months, when it's stated that it was going to be used for 30 years?

You don't need 2 generators, so that's unnecessary extra expense. Same goes for the trailer, not needed if you want the system for the house.

>>8 X 250KWH BYD BATTERIES IN TWO CABINET
>>KRATOS LITHIUM SOLAR BATTERY

Are these are the same thing, listed twice?
http://gunagulla.com Loomberah weather and astronomy including live solar radiation intensity and UV + Gunagulla aquaponics, organic eggs and cherries
User avatar
Gordon-Loomberah
Community Moderator
 
Posts: 5762
Joined: Thu Sep 24, 2009 9:41 pm
Location: Loomberah NSW Australia

Re: Kratos lithium system?

Postby Jet » Sun Aug 26, 2018 10:45 am

Thanks for the reply Gordon, the guy was going to be travelling around towing this behind his 5th wheeler but due to health reasons had to give up and is now in a retirement home. I had thought that the BYD batteries were inside a kratos cabinet?
Cheers
Jet
Jet
Solar Supporter
Solar Supporter
 
Posts: 5
Joined: Sat Aug 25, 2018 10:40 pm

Re: Kratos lithium system?

Postby Gordon-Loomberah » Sun Aug 26, 2018 11:45 am

I'm not familiar with it, I guess the Kratos could well be a cabinet, but it is listed as a "solar battery". (whatever that is! A battery is a battery, it doesn't matter how you charge it)

Anyway, you have to consider that you are paying for all the extras that you don't need, and the probable issue of no warranty (you'd have to check if it is transferable to a new owner) vs buying the parts you do need, with a full warranty.
http://gunagulla.com Loomberah weather and astronomy including live solar radiation intensity and UV + Gunagulla aquaponics, organic eggs and cherries
User avatar
Gordon-Loomberah
Community Moderator
 
Posts: 5762
Joined: Thu Sep 24, 2009 9:41 pm
Location: Loomberah NSW Australia


Return to Q&A - wind and solar power basics

Who is online

Users browsing this forum: No registered users and 2 guests

new solar power specials
cron