All Our Boards Are Built In-House
All of our boards are built with the highest quality products by our in house team of Victron trained experts.
Choose the power, storage and solar capacity you need.
Start with the inverter size for your peak loads, add battery storage for the runtime you need, then choose the solar input that will recharge it. If you are unsure, use the advice route and we will help you size it.
Inverter sizingBattery runtimeSolar chargingExisting PV options
Configure Your Off-Grid Power System
Not sure what size you need?
Get bespoke advice
Let our team check the system before you order.
Tell us what you want to run, your expected usage and whether you have existing solar or generator backup. We can help narrow down inverter size, storage and charging capacity.
Why Callidus?
Off-grid systems designed to be easier to specify and install.
From component selection through to support after purchase, the system is built around practical off-grid use.
1
Built in-house
Pre-built boards assembled by our own team using quality Victron-based components.
2
Pre-wired & configured
Key equipment is prepared before dispatch to reduce complexity when the system reaches site.
3
Flexible solar input
Choose panels with the system or discuss using compatible solar equipment you already have.
4
Technical support
Get help with system sizing, product selection and the practical questions around your project.
Where it works
Reliable power where a normal grid connection is difficult or expensive.
Remote buildings & cabins
Power lighting, refrigeration, electronics, pumps and everyday appliances away from the grid.
Workshops & land
Create a practical power supply for tools, outbuildings, farms and sites where trenching in mains power is impractical.
No-grid properties
Build a standalone energy system around solar generation and battery storage instead of relying on a new utility connection.
Generator reduction
Use stored solar energy for routine loads and keep generator use for periods when extra charging or power is required.
Customer Boards
From site to power
A simpler route to a complete off-grid system.
Configure the system around your loads and runtime, then connect the final equipment on site using the documentation and support supplied.
1
Size the loads
Work out what needs to run at the same time so you can choose a suitable inverter.
2
Choose storage
Select battery capacity around the runtime and autonomy your site needs.
3
Add solar
Choose an appropriate solar array, or discuss connecting compatible existing PV.
4
Install & commission
Mount the system, make the site connections and commission it for your application.
Customer story
See what Pete Goss MBE says about his Callidus pre-built board.
Questions before you buy?
Off-grid system FAQs
How do I choose the inverter size?
The inverter determines how much AC load the system can supply at once. Start with the appliances and equipment that may run simultaneously, including higher-starting loads, and ask us to check the sizing if you are unsure.
How much battery storage do I need?
Battery capacity depends on how much energy you use between charges, how long you want the system to run without good solar input, and how much reserve you want to keep.
Can I use solar panels I already have?
Potentially. Compatibility depends on the panel string voltage/current and the charge-control design. Send us the panel details and we can help check the route.
Can a generator be used as backup?
Many off-grid systems can be designed to accept generator or other AC charging. The correct arrangement depends on the final system specification and site requirements.
What if I do not know what system I need?
Use the bespoke advice form below. Tell us what you want to power, expected usage, location and any existing solar or generator equipment, and our team can help you narrow down the right setup.
Need reliable power somewhere the grid does not reach?
Configure a complete system online, or tell our team about the site and we will help you work through the right inverter, battery and solar capacity.
Want us to help design it?
NEED HELP SIZING THE SYSTEM?
Tell us what you need to power, where the system will be used and whether you already have solar or a generator. Our team can help you work out the right inverter, battery and solar capacity.
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