{"product_id":"renogy-500a-battery-monitor-with-shunt-sampler-coulomb-meter","title":"500A Battery Monitor with Shunt\/Sampler (Coulomb meter)","description":"\u003cp\u003e\u003cstrong\u003eA 500A shunt monitor with ±1% accuracy and a 6m display lead.\u003c\/strong\u003e The instrument that tells you what the battery is actually doing — in amps and percent, not in a voltage reading you have to interpret.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e±1% accuracy\u003c\/strong\u003e on voltage, current and capacity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10–120V\u003c\/strong\u003e working voltage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh and low capacity alarms\u003c\/strong\u003e with flashing backlight\u003c\/li\u003e\n\u003cli\u003eLead acid (AGM, gel), LiFePO4, lithium-ion and NiMH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6m shielded display lead\u003c\/strong\u003e, LCD 99 × 61 × 18mm\u003c\/li\u003e\n\u003cli\u003ePreset capacity 0.1–9999Ah, 1–2mA standby\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhy voltage alone is not enough on lithium\u003c\/h3\u003e\u003cp\u003eA LiFePO4 pack holds almost the same terminal voltage from 80% charge down to 20%. That flat curve is excellent for running appliances and useless for judging how much is left. A shunt counts every amp in and out, so you get a real percentage and a real time-to-empty — the difference between guessing and knowing whether you can run the kettle before you drive.\u003c\/p\u003e\u003ch3\u003eFitting it\u003c\/h3\u003e\u003cp\u003eThe shunt goes in the negative line between the battery's negative terminal and everything else in the system. Everything — loads, chargers, solar, the lot. Miss one circuit and it becomes invisible to the monitor, and your percentage quietly drifts wrong over a week.\u003c\/p\u003e\u003ch3\u003eBefore you order\u003c\/h3\u003e\u003cp\u003eSet the battery capacity correctly on first use, then charge to full so the monitor has a reference point. The 6m lead is generous but measure your run from the battery to wherever you want the display.\u003c\/p\u003e","brand":"Renogy","offers":[{"title":"Default Title","offer_id":51358104125607,"sku":"RBM500-UK","price":53.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/1158\/3143\/files\/RBM5001__75857.1701416845.1280.1280.jpg?v=1789801239","url":"https:\/\/shop.roamwired.com\/products\/renogy-500a-battery-monitor-with-shunt-sampler-coulomb-meter","provider":"Roam Wired Shop","version":"1.0","type":"link"}