Renogy Battery Shunt 300
Sold by Renogy UK
From £71.99
Renogy UK's price when we last checked, on 2 September 2026. They run promotions and price by variant, so confirm the current price on their page before you buy.
Buy at Renogy UK (opens Renogy UK in a new tab)This is an affiliate link. Renogy UK takes your order, payment and delivery — Roam Wired is not the seller. If you buy through it we may earn a commission, at no extra cost to you. How we make money
How buying this works
Roam Wired does not stock this item. The button above hands you over to the seller's own shop, where you place the order, pay and arrange delivery directly with them. Nothing is added to a Roam Wired basket, and we never see your payment details.
We list it because it is the part our calculator would specify for a build like yours, not because we make the most on it. How we make money
Delivery and returns
Delivery cost, delivery time and the returns window are set by the seller, not by us, and Roam Wired's own £10 / free-over-£250 UK delivery does not apply here. Check their delivery and returns terms on their product page before you order.
Your consumer rights, including the 14-day right to cancel a distance sale, are against the seller who took your order.
Warranty and support
The manufacturer's warranty is handled by the seller you buy from. If something fails, raise it with them and quote their order number — we cannot open a claim on your behalf.
Happy to help you work out whether a part is right for your build: get in touch, or run the numbers through the free electrical calculator.
Overview
Renogy Battery Shunt 300
A 300A Bluetooth shunt with ±1% accuracy and a built-in temperature sensor. The modern alternative to a wired monitor — no display to mount, no aperture to cut, and the readings appear on your phone and on any compatible Renogy screen.
- 300A continuous, 500A peak for under 10 seconds
- ±1% current accuracy, 0.01A resolution
- Bluetooth LE and BLE Mesh
- Battery capacity 1–6,500Ah, voltage input 8–120V
- Temperature sensing −20°C to 80°C, ±1%
- Under 0.1W consumption, 260g, 134 × 97 × 31mm, M10 bolts
Mesh is the interesting part
BLE Mesh means this shunt does not just talk to your phone — it can join a network of Renogy devices, so a ONE Core hub or a compatible display picks up its data without a separate cable run. On a system built from Renogy parts, that turns several isolated gadgets into something that behaves like one system.
Sizing: 300A is not always enough
Check your worst case. A 3,000W inverter at 12V draws around 270A, which is inside the 300A continuous rating but leaves very little margin once you add a fridge and a heater. For a big inverter build, the 500A monitor is the safer choice; for a 2,000W system, 300A is ample.
Before you order
Fits with M10 bolts and surface mounts, so allow space beside the battery. Operating range is −10°C to 50°C — narrower than the batteries it monitors, so keep it inside the insulated envelope.
Renogy's published figures
Taken from Renogy's own specification for this product, on the date shown by the price. Anything wired into 230V mains should be signed off by a qualified electrician.
Build notes for this part
Get the sizing and fitting notes.
Useful product advice, installation considerations and occasional offers for this part of your van build.