Mastervolt Battery Mate (83116025)

A standard RJ45 UTP cable (VE.Bus), available 0.3m to 20m — any length we stock will work.

VE.Direct — SmartSolar/BlueSolar MPPTs, SmartShunt, BMV monitors and Phoenix inverters (one official VE.Direct cable per device, 0.3m-10m, right-angle version available for tight spaces). VE.Bus — MultiPlus, MultiPlus-II and Quattro (standard straight-through RJ45 UTP, not crossover). VE.Can — managed batteries and daisy-chained devices (RJ45 with the correct Type A/B BMS cable and an RJ45 terminator at each end of the chain).

Victron's official first step: restart your phone (a real restart, not lock/unlock). Then check: (1) it's a 'Smart' product with the Bluetooth symbol and it's in range; (2) no other phone is connected — only one phone can connect at a time; (3) you're connecting from WITHIN the VictronConnect app, never from the phone's Bluetooth system menu — if you paired from the system menu, remove the pairing there, then reconnect inside the app. Full official guide: https://www.victronenergy.com/media/pg/VictronConnect_app/en/troubleshooting.html

Victron Energy's limited warranty is 5 years from purchase on power products — inverters, inverter/chargers, chargers, MPPTs, monitors, GX devices, DC-DC and accessories. Exceptions: Victron lead-acid batteries 2 years and Victron lithium batteries 3 years, and battery claims require proof of correct usage and charging. Victron offers an extension to 10 years for a 10% surcharge, applied for before the original term ends. Claims go through us as your dealer — email your invoice, serial number and a fault description and we handle it. In addition to your Australian Consumer Law rights. Official policy: https://www.victronenergy.com/support/warranty-and-repairs

VRM (Victron Remote Management) is Victron's free online portal. With a Cerbo GX online you can monitor your whole system from anywhere, get alarms, review history, and allow remote support — it's how we program and troubleshoot customer systems without a site visit. Official VRM FAQ: https://www.victronenergy.com/live/vrm_portal:faq - videos: https://youtu.be/mmGaxBL-1c0 and https://youtu.be/3tPLHot7TAc

Outdated Bluetooth bonding is the usual cause (the product only remembers the last 10 phones, and a changed PIN breaks old pairings). Remove the pairing completely from your phone's Bluetooth settings, reopen VictronConnect and re-pair. If the PIN is rejected, reset it to the default 000000 using the PUK printed on the product's serial number label, connect with 000000, then set a new PIN. Android users: VictronConnect also needs Location permission enabled to scan for Bluetooth devices. Official guide: https://www.victronenergy.com/media/pg/VictronConnect_app/en/troubleshooting.html

Voltage is a poor fuel gauge — and for lithium it's nearly useless, because a LiFePO4 battery sits at almost the same voltage (around 13.2-13.3V) from 90% full down to 20%. By the time the voltage visibly drops, you're nearly empty. A shunt-based monitor (SmartShunt or BMV) counts every amp-hour in and out, giving you a true state-of-charge percentage, time-remaining, and history. Voltage-only monitoring is fine as a simple low-battery alarm; if you actually want to know how much power you have left, fit a shunt. Install note: the shunt sits in the NEGATIVE cable, last component before the battery, with every load and charge source connected on the far side of it — anything wired battery-side of the shunt is invisible to the monitor.

VictronConnect includes the latest firmware and prompts you automatically — look for the orange exclamation on the settings cog, tap it, then tap UPDATE. Updates preserve your settings and history and don't need internet. Exception: VE.Bus products (MultiPlus, Quattro) need an MK3-USB adaptor and Victron's separate VE.Bus firmware guide — or we can do it for you, remotely if your Cerbo GX is online. Official guide: https://www.victronenergy.com/media/pg/VictronConnect_app/en/firmware-updates.html

Don't panic — the update restarts every time you reconnect, and nothing is lost. Victron's advice: keep the phone as close to the product as possible, remove the Bluetooth pairing from your phone's system menu and re-pair, and if it stops at a random percentage just keep retrying — it will succeed eventually. Still stuck? Try a different phone (iOS works most reliably). If it fails at 4% or less there's a per-product recovery procedure — contact us or see the official guide: https://www.victronenergy.com/media/pg/VictronConnect_app/en/troubleshooting.html

Check every cable connection first, then create a VictronConnect Service Report (VictronConnect menu > Settings > Service report > CREATE) and attach it to your enquiry — it gives us the diagnostics to solve most issues in one reply instead of five. For system-level history (voltages, state of charge over time), a GX device connected to VRM gives us full remote diagnostics.

Official sources we recommend: all software and apps at https://www.victronenergy.com/support-and-downloads/software - all manuals at https://www.victronenergy.com/support-and-downloads/manuals - the VRM FAQ at https://www.victronenergy.com/live/vrm_portal:faq - and the Victron Community knowledgebase at https://community.victronenergy.com - or just contact us.