Anyone else finding the Victron SmartShunt a game changer for keeping tabs on leisure battery state?

Mine's been bolted in the garden office setup for a while now and honestly the days of prodding a battery with a dodgy voltmeter and hoping for the best feel like ancient history.

The Bluetooth sync to the VictronConnect app is the bit that got me — being able to glance at your phone and see exact state of charge, time remaining, and historical discharge cycles is genuinely witchcraft compared to what we were doing before. My Fogstar 200Ah lithium barely gets a second glance now because the SmartShunt is doing all the worrying on my behalf.

Few things worth flagging for anyone considering one:

• Setup matters — get your battery capacity and Peukert exponent dialled in properly or the readings will be about as accurate as a weather forecast
• The shunt itself is dead simple to wire, though make sure all negatives route through it or you'll get drift in the readings
• Victron's 500A version is worth the marginal extra spend if you're running anything serious

Only gripe? Once you've got accurate SOC data you immediately start wanting to add solar, a DC-DC charger, a wind turbine, and approximately seven other things to the system — the SmartShunt is essentially a gateway drug.

Anyone else found theirs changed how they actually use their battery capacity day to day, or is it just me obsessively checking percentages at 2am?

DuctTapeDave62 | Posts: 847 | Location: West Yorkshire

@NorfolkVanLifer Completely agree mate. Had mine wired into the van's 200Ah lithium setup for about eight months now and the historical data logging is what really won me over. Being able to see exactly how hard the solar's working overnight versus what the compressor fridge is actually pulling — proper eye-opening stuff.

One thing worth mentioning for anyone considering one — make sure your negative cable routing is sorted before you fit the shunt. I bodged mine first time round and had to redo the whole lot. Twenty minutes of proper planning saves you an afternoon of swearing in a car park in Harrogate, trust me on that. 😅

The Victron Connect app on Android is rock solid too. Anyone else using it alongside a Cerbo GX for the full picture?

BerlingoSolar | Posts: 312 | Location: Array

Running one in my garden office setup — absolute no-brainer tbh. The SOC accuracy once you've nailed the battery capacity and Peukert settings is properly impressive.

Worth mentioning: pair it with VictronConnect and you get the historical discharge graphs too, which helped me realise my Fogstar Drift LiFePO4 wasn't actually hitting the capacity I expected initially (tweaked the settings, sorted now).

Only gripe — the shunt itself needs a solid negative-bus installation or your readings go a bit wonky. Took me an embarrassing amount of head-scratching to figure that one out. 😅

@DuctTapeDave62 curious what battery chemistry you've got it monitoring?

WheresMeWires16 | Posts: 1,203 | Location: Shropshire

Dead right @NorfolkVanLifer. What tipped it for me was the historical data — being able to scroll back and see exactly when my batteries were taking a hammering overnight was a proper revelation. Realised my 12v fridge was drawing far more than I'd estimated.

One thing worth mentioning that nobody seems to talk about: make sure you nail the Peukert exponent and charge efficiency settings for your specific battery chemistry. Leave them at defaults and your SOC readings will drift noticeably over time, especially on LiFePO4. Victron's documentation is decent but there's better guidance floating around on the Victron Community forum.

Also the VictronConnect app has improved massively in the last couple of updates — synoptic view is genuinely useful now rather than just the raw numbers.

StormyWelder | Posts: 164 | Location: Array

Got one sitting in my shepherd's hut build at the moment and honestly — why did I wait so long? 🤦

Quick question for the group though: has anyone found the SOC calibration drifts if you're running a mixed Fogstar/older AGM bank? Mine seems to lose its confidence around the 40% mark and starts acting like a nervous accountant. 😅

Also curious whether it plays nicely with a Victron MPPT via the VE.Direct cable, or do you need the full Cerbo GX setup to get everything talking properly? I've got solar panels on the hut roof and ideally want one dashboard to rule them all rather than flipping between apps like a maniac.