Frequently Asked Questions

Answers to the questions we hear most from RV, marine, and off-grid customers. Don't see your question? Contact us and we'll add it.

About Jonsson Tech & Ordering

Is Jonsson Tech an authorized Victron Energy distributor?

Yes. Jonsson Tech LLC is an official authorized Victron Energy distributor based in Houston, Texas, founded in 2019 by twin brothers Ryan and Craig Jonsson. We are also an authorized dealer of Renogy, BougeRV, Discover, and Epoch Batteries. Every product we sell is genuine and carries the full manufacturer warranty.

How fast do you ship?

All Victron Energy products ship within 5 days of placing your order, nationwide from our Houston warehouse — including items marked "out of stock" on the site. Need it faster? Call us at 346-574-9652; expedited and same-day options are often possible.

Can I pick up my order locally in Houston?

Yes — local pickup in Houston, Texas can be arranged for most in-stock items. Contact us before ordering and we'll have it ready.

Do you offer dealer, contractor, or utility/wholesale pricing?

Yes, for qualified contractors, electrical utilities, and dealers ordering in volume. See our Installer Pricing page or email us with your business details and typical order volume.

Choosing & Sizing Equipment

How do I know what size MPPT charge controller or inverter I need?

Sizing depends on your panel wattage, battery bank voltage and capacity, and your peak AC load. As a starting rule of thumb, size your Victron MPPT charge controller for at least 1.2x your array's rated output in amps, and size your inverter to comfortably cover your highest simultaneous load with headroom for surge/startup current. Email us your panel wattage, battery bank size, and the appliances you plan to run, and we'll confirm the right model before you order — free system design help is included with every order.

Can Victron components from different product lines work together?

Yes. Victron's ecosystem is designed to interconnect: MPPT charge controllers, MultiPlus/Quattro inverters, Lynx distributors, Smart Shunts, and battery monitors all communicate over VE.Direct or VE.Bus, and can be tied into a single Cerbo GX display for one view of the whole system. If you're combining equipment from different generations or with a non-Victron battery (e.g. a third-party LiFePO4 pack), tell us your full parts list before ordering — mismatched communication protocols are the most common integration issue we troubleshoot, and it's much easier to fix before installation than after.

Are your Victron products genuine and covered by manufacturer warranty?

Yes. We sell genuine, new Victron Energy products, and everything we carry is covered by the manufacturer's standard warranty. If you ever suspect a defect, contact us first — we can usually diagnose the issue and start a warranty claim without you needing to ship the unit back to Victron directly.

Orders, Shipping & Returns

What is your return policy?

We offer a 30-day return policy on all unused and unopened products. Items must be returned in their original condition and packaging for a full refund. Contact us before sending anything back so we can set up the return.

What if my order arrives damaged or a component doesn't power on?

Contact us right away with your order number and a photo/description of the issue. Most DOA (dead-on-arrival) claims are resolved with a fast replacement or refund — we don't require you to go through a lengthy manufacturer RMA process for straightforward cases.

Technical Support & Services

Do you provide wiring diagrams or system design help?

Yes. For RV, marine, and off-grid solar systems we can provide a wiring diagram and parts list based on your battery bank, panel array, and load requirements — this is a free part of the buying process, not a paid service.

Do you help with Victron programming, commissioning, and monitoring?

Yes. We commission and program the systems we sell (including custom Node-RED automation), and we offer remote monitoring and support plans starting at $15/month that watch your batteries, charging, and alarms around the clock via Victron VRM.

I'm getting inconsistent battery readings or state-of-charge numbers — what's wrong?

This is almost always a Smart Shunt or BMV placement/wiring issue — usually the shunt is on the wrong side of a parallel battery connection, or the synchronization ("full charge") voltage hasn't been set correctly for your battery chemistry. Send us your battery type, wiring layout, and a photo of your shunt installation and we can usually pinpoint the fix without a truck roll or return.

My MultiPlus-II inverts fine on batteries, but trips the breaker the moment I connect shore power. What's wrong?

Applies to: Victron MultiPlus-II installations in RVs, travel trailers, and other vehicles (30A/50A shore power).

This failure signature — fine on batteries, instant trip on AC-in — usually isn't a wiring fault. It's a double neutral-ground bond. The MultiPlus-II has an internal ground relay that bonds neutral to protective earth (PE) on the output side while inverting. Most 50A shore pedestals also bond neutral to ground, and many newer pedestals have built-in GFCI protection. If both bonds are active when shore power connects, a ground loop forms through your chassis ground, current returns on the ground path, and the GFCI/breaker trips immediately. A correctly configured system has exactly one N-G bond point at any time — never two.

How to diagnose: (1) Check whether the pedestal breaker is GFCI-protected — if so, that's a strong signal. (2) Review the ground relay setting in VictronConnect; in a vehicle where PE is already bonded to the chassis, the Multi's relay generally should not also bond N-G on shore power. (3) Inspect the PE terminal on the AC-in side for a stray strand bridging PE to neutral.

Quick confirmation test: plug into a standard non-GFCI 120V household outlet with a dogbone adapter. If the connection holds, you've confirmed the double-bond/GFCI interaction — not your wiring.

The fix: ensure only one N-G bond exists at any moment, which in practice means configuring the Multi's ground relay correctly for a vehicle installation. ⚠️ Neutral-ground bonding is safety-critical — if you're not confident, have a qualified RV electrician verify the configuration. If the non-GFCI test also trips, contact us with your serial number and what you've tested.

Who do I contact for questions not covered here?

Call 346-574-9652, or email Ryan (ryan@jonssontech.net) or Craig (craig@jonssontech.net) and we'll get back to you directly.