Learning Center
JonssonTech Learning Center
Everything you need to understand, size, and maintain your off-grid power system — from interactive calculators to wiring guides and product specs.
Interactive Calculators
View all tools →System Load Audit
Add your appliances and get your daily watt-hour total, peak load, and a breakdown of your biggest energy users.
Battery Bank Sizing
Enter your daily energy use and autonomy needs — get minimum Ah, configuration options, and LiFePO4 vs AGM comparison.
Solar & MPPT Sizing
Input your panel array and battery voltage to find the right Victron SmartSolar MPPT and see daily energy production.
DC Wire Sizing
Calculate the correct AWG gauge for any DC run based on current, length, and acceptable voltage drop.
System Guides
RV & Overland Solar Guide
How to size a 12V Victron system for a Class A, Class C, fifth wheel, or overland build. Component checklist included.
Off-Grid Cabin Guide
24V and 48V system design for cabins and tiny houses. Covers MultiPlus inverter selection, battery sizing, and generator integration.
Marine Power Guide
Victron marine systems, alternator charging with Orion-Tr Smart, and shore power integration for liveaboards and cruisers.
Van & Sprinter Build Guide
Slim panel options, 200Ah LiFePO4 builds, Victron SmartShunt monitoring, and DC-DC charging from the alternator.
Wiring Diagrams
Basic 12V Solar System
Panel → MPPT → Battery → Fuse → Load. Includes wire gauge recommendations for each segment.
COMING SOON
MultiPlus with Solar & Shore
Complete 12V/24V system with Victron MultiPlus, SmartSolar MPPT, SmartShunt, and Cerbo GX.
COMING SOON
48V Off-Grid Cabin
Large-array 48V system with Quattro inverter/charger, generator integration, and AC load panel.
COMING SOON
Need a custom wiring diagram? Contact us — we include one with every installation proposal.
Victron SmartSolar MPPT Reference
Victron site →Quick reference. Use the MPPT Calculator to get a recommendation automatically.
Articles & Guides
All articles →MultiPlus vs MultiPlus II — Which One Do You Need?
A detailed comparison of Victron's two most popular inverter/chargers and how to choose for your system.
How to Size a Victron SmartSolar MPPT: The Complete Guide
Step-by-step guide to choosing the right MPPT controller for your panel array and battery bank.
Victron Cerbo GX Setup Guide: VRM Remote Monitoring Step by Step
How to set up the Cerbo GX and access your system from anywhere with Victron's VRM portal.
Ready to design your system?
Our calculators give you the numbers — but nothing beats a professional system design. Get a free quote from JonssonTech and we'll spec everything out for you.