Knox Krypton PV6500 4.5kW Hybrid Inverter

Note: 4500 W rated output from up to 6500 W of PV, 19.5 A nominal output current and a 9000 VA surge. In the Krypton range the model number is the solar input, not the output: this is a 4.5 kW inverter taking 6500 W of panels. Knox model code 4.5kW-24-pV6500-TWIN. Knox's datasheet lists grid-tie operation and grid feeding, but its certification list (IEC 62109-1 and -2, IEC 61683, the EU Low Voltage Directive, and an "IEC 61682" that is probably a misprint of 61683) has no IEC 62116 anti-islanding or IEC 61727 grid-connection standard, so confirm your distribution company will accept it for net metering before planning an export system. The grid output range is printed as 170 to 280 V and 90 to 280 V, the same figures as the off-grid input windows, so ask the dealer what grid voltage it exports at. The battery voltage does not add up: the model code reads 24 V, but the battery table gives 48 VDC with a 54 V float and a 63 V cut-off. Both cannot be right, so the battery voltage is left blank here until the dealer confirms it, and it matters, because a 24 V inverter cannot run a 48 V bank. One MPPT at 27 A (40 A maximum) with a 500 V ceiling, starting at 120 V and feeding the grid from 150 V. The table gives a 60 to 450 V MPPT window and the front page 90 to 450 V. 120 A charging from solar and from mains. Pure sine wave output with a 10 ms transfer for computers and 20 ms for appliances, 93% battery-mode efficiency and 95% maximum DC to AC conversion, power factor above 0.99. Dual outputs for smart load management, a 12 V DC output of up to 100 W for a DC fan, LED lights or a router, RGB status lights, built-in WiFi with an Android and iOS app, USB on-the-go, dry contact and a reserved RS485 BMS port. It runs without a battery, accepts mains or generator input, and restarts on mains at 180 V. Replaceable fan and a built-in anti-dust kit. The datasheet also prints a "Battery + PV output power" of 8000 W for both models, double the 4 kW model's rating, without explaining it, so the rated output is used. 12 kg in a 330 × 520 × 120 mm case, rated -10 to +50 °C. The datasheet gives no IP rating and no warranty term, so ask the dealer for both. Price shown is Rs 115,000 at both w11stop.com and Kamal Solar (in stock), read 21 September 2026.