Fitting SavvyShunt

Before you start

Check which model you have and that the panel is on the latest software. Update instructions are in the SavvyVan3 user guide.

Then work out where the shunt goes before you disconnect anything. It sits at the battery, and every negative in the van has to end up on the far side of it.

The shunt is a serviceable part. It must be fitted where it can be reached, disconnected and removed without dismantling fixed furniture or bonded panels - for example in a battery locker, under a seat, or behind a removable access panel.

Wiring it in

It needs two things: a 12V or 24V supply, and to sit inline on the battery negative.

What the light is telling you

The shunt has one red light. Check it before you go near the panel.

The light	What it means
Red, flashing quickly	Powered and working. Go ahead and pair it
Nothing at all	No power reaching it, or a fault - see troubleshooting

Pairing it

1. On the panel, open Installer Settings, enter the passcode, and go to the device pairing screen - the one with Scan on the right.
2. Look for SavvyShunt in the right-hand list. The panel listens all the time, so it usually appears on its own once the page is open, with a signal reading beside it. If it does not, tap Scan.
3. Tap the green + next to SavvyShunt. That is it.

Once it connects, the symbol beside it turns blue and it moves to the saved list. Its cog goes straight to the battery settings.

Setting your capacity

Tap the cog beside the saved device, or go to Installer Settings → Battery Settings. Pairing sets Shunt Type to SavvyShunt for you, so check it reads that, then set the capacity.

Enter usable capacity, not the number on the battery. Batteries do not like being emptied, and how far you can safely go depends on the chemistry:

Battery	Enter this share of total capacity
Lithium	80%
AGM	60%
Lead acid	50%

Then tap Reset Offset. That sets the current reading to 100% full, and it adjusts from there as the battery charges. Do it again if you fit a new battery or move the shunt.

Using it

Your battery now sits on the main screen with its percentage, live current and the direction it is flowing. Tap it for the full page.

There are two versions of the battery page, and which you have depends on the panel rather than the shunt. A new panel, from software 2.5.1, opens the newer one: the battery on a card, with VOLTAGE, CURRENT, POWER and TIME TO EMPTY (or TIME TO FULL while it charges) beside the dial, and, when nothing else shares the page, a STATE OF CHARGE graph next to it. Tap Usage Graph for the history - voltage, state of charge or current, by day, week or month. A panel updated from older software keeps the classic Power Management page shown above, with the graph and its Volts, Amps and AmpHours buttons on the page itself. Both work the same way:

• Time to charge or discharge is based on what you are using right now, so it moves as things switch on and off.
• History covers amp usage and battery voltage by day, week or month - which is how you find the thing quietly draining your battery overnight. The panel keeps 30 days of it by default.

Troubleshooting

Not in the list when you scan? Check the shunt’s red light is flashing - no light means no supply, the usual culprit.

No light? Check the fuse and the feed first - a missing supply is the commonest reason a shunt never appears on the panel. If the feed is good and it still stays dark, tell us rather than working around it.

The battery dial says OFL. The panel has heard nothing from the shunt for a full minute - a short drop never shows - and on the newer battery page the figures read -- rather than zero. Check the shunt’s red light and its supply. Once it is powered the panel picks it up again by itself.

Specification

Working voltage	7–30V
Draw	0.005A at 12V
Sampling	Four times a second
Batteries	AGM, lead acid, lithium
Systems	12V and 24V

Warranty

SavvyShunt carries our 12-month warranty. The free second year you get for registering is for the SavvyVan3 panel itself, so there is nothing to register for this one.