Victron Energy SIN241251100 Sun Inverter 24/250-10 IEC

Victron Energy Sun Inverter 24/250-10 250VA Sine Wave Inverter and 10A PWM Solar Charger. One Unit. Minimum Wiring.

---

Product Overview

The Victron Energy Sun Inverter 24/250-10 IEC (SIN241251100) is a compact all-in-one unit combining a 250VA sine wave inverter and a 10A PWM solar charger in a single enclosure designed for 24V battery systems. Intended for powering 230V AC domestic equipment from a leisure or automotive battery bank, it allows a solar panel to charge the 24V battery while the inverter makes that stored energy available as 230V AC all in one straightforward installation with screw terminal DC and PV connections and no specialist tools or cable terminals required.

The Sun Inverter is built on a full bridge plus toroidal transformer topology with a proven track record of reliability. It includes Bluetooth for VictronConnect app monitoring and configuration, a VE.Direct port for connection to a GX device or GlobalLink 520 for VRM system monitoring, ECO mode for reduced standby consumption, and a fully programmable battery charge algorithm via the app. The IEC-320 socket allows direct connection of a standard IEC-320 plug no hardwiring to the AC output is required. An IEC-320 male plug is included. Note that the Sun Inverter does not include a built-in automatic transfer switch for installations requiring transfer to an external AC source, the Victron Filax Automatic Transfer Switch is recommended (sold separately).

---

Key Specifications

• Part Number: SIN241251100
• Product: Sun Inverter 24/250-10 IEC
• Battery Voltage: 24V
• Inverter Output: 250VA — sine wave
• Solar Charger: 10A PWM
• Solar Charge Algorithm: Programmable
• AC Output Socket: IEC-320 (male plug included)
• AC Output Voltage: 210–245V (configurable)
• AC Output Frequency: 50Hz or 60Hz (configurable)
• ECO Mode: Yes — standby below pre-set load (min 15W); checks every 2.5 seconds (adjustable)
• High Start-Up Power: Yes
• Topology: Full bridge + toroidal transformer
• Bluetooth: Yes — VictronConnect app (iOS and Android)
• VE.Direct Port: Yes — GX device, GlobalLink 520, or computer
• Remote On/Off: Yes — VE.Direct Remote panel (sold separately) or 2-pole connector
• LED Diagnosis: Yes
• Dynamic Cut-Off: Yes — load-dependent battery cut-off level
• Battery Temperature Compensation: Yes — configurable; or low temperature cut-off
• Short Circuit Protection: Yes
• Overheating Protection: Yes — overload and high ambient temperature
• DC Connections: Screw terminals — no special tools
• PV Connections: Screw terminals — no special tools
• Built-In Transfer Switch: No — requires external Filax ATS (sold separately)
• Peak/Surge Power: Not specified — confirm with supplier
• PV Input Voltage Range: Not specified — confirm with supplier
• Efficiency: Not specified — confirm with supplier
• Standby Power (ECO Mode): Not specified — confirm with supplier
• Operating Temperature Range: Not specified — confirm with supplier
• IP Rating: Not specified — confirm with supplier
• Dimensions: Not specified — confirm with supplier
• Weight: Not specified — confirm with supplier

---

Features & Benefits

• Combined Sine Wave Inverter and PWM Solar Charger — A single unit handles both the solar charging of the 24V battery and the conversion of that stored energy to 230V AC. This eliminates a separate solar charge controller and simplifies wiring — one connection to the battery, one to the solar panel, one IEC-320 socket for the AC output load. Designed for installations where simplicity and minimum component count are priorities.
• Full Bridge + Toroidal Transformer Topology — The transformer-based design delivers proven long-term reliability, high start-up power for inrush-demanding loads, and robust short circuit and overheating protection. While less weight-efficient than high-frequency designs, the toroidal transformer topology is recognised for durability and stable sine wave output quality.
• High Start-Up Power — Handles the inrush current required to start LED lamp drivers, halogen lighting transformers, electric tools, and other loads that draw significantly more current at start-up than during steady-state operation.
• ECO Mode — Standby Load Reduction — In ECO mode, the inverter shuts down when load drops below 15W (minimum) and briefly powers up every 2.5 seconds (adjustable) to check for demand. If load exceeds the set threshold, the inverter remains running; if not, it shuts down again. Reduces standby power consumption — useful in off-grid and battery systems where every watt of standby draw matters for battery autonomy.
• 10A PWM Solar Charger — Programmable Algorithm — The integrated PWM solar charger accepts PV input and charges the 24V battery using a programmable charge algorithm — charge current, voltages, and temperature compensation all configurable via the VictronConnect app. Note: PWM (Pulse Width Modulation) chargers are simpler and less harvest-efficient than MPPT chargers at varying irradiance — the Sun Inverter is designed for compact, straightforward applications rather than maximum energy harvest optimisation.
• Dynamic Cut-Off — Load-Dependent Battery Protection — Rather than a fixed low battery voltage cut-off, dynamic cut-off adjusts the cut-off threshold based on the current load. Under heavy load, a higher voltage cut-off prevents over-discharge driven by high current draw; under light load, a lower threshold is acceptable. This protects battery health more accurately than a fixed threshold across varying load conditions.
• Fully Configurable via VictronConnect App — Bluetooth — All inverter and charger parameters are configurable wirelessly via Bluetooth using the free VictronConnect app on any iOS or Android device. Parameters include output voltage (210–245V), output frequency (50/60Hz), ECO mode settings, low battery alarm and cut-off levels, dynamic cut-off, charge current, charge algorithm and voltages, and temperature compensation or low-temperature cut-off. No physical interface or wired connection to a computer is required for configuration.
• VE.Direct Port — GX Device and VRM Integration — The VE.Direct port connects the Sun Inverter to a Victron GX device (Cerbo GX or equivalent) for full system monitoring via the VRM portal, or to a GlobalLink 520 for lightweight remote monitoring. It also connects directly to a computer for monitoring and configuration via VictronConnect without Bluetooth. Parameters accessible include inverter input/output voltage and load percentage, solar power, voltage, and current, plus operational state and alarms.
• IEC-320 Socket — Direct Plug Connection — The IEC-320 AC output socket allows direct connection of standard IEC-320 appliance cords without hardwiring. An IEC-320 male plug is included in the box. Suitable for direct connection of compatible 230V appliances in the 250VA output range.
• Screw Terminal DC and PV Connections — No Special Tools — Battery and solar panel connections are made via standard screw terminals — no specialist cable lugs, crimping tools, or MC4 connectors required. Simplifies installation in tight spaces and field servicing.
• Remote On/Off — Panel and Switch Options — The inverter can be switched on/off remotely via the Phoenix Inverter Control VE.Direct Remote panel (sold separately) or via a simple on/off switch connected to the 2-pole connector. Battery positive to the left-hand contact of the connector is also a valid control method.
• LED Diagnosis — Status and fault indication via LEDs on the unit face — refer to the manual for the full LED code description.

---

Technical Specs

---

Compatible With / Goes Well With

Battery Systems:

• 24V leisure, automotive, and deep-cycle battery banks (lead acid — AGM, gel, flooded)
• Lithium compatibility — confirm via VictronConnect charge algorithm configuration

Solar Panels:

• Any 24V-compatible PV panel within the PWM charger's input voltage range (confirm from datasheet)
• Maximum 10A solar charge current at 24V nominal

Monitoring and Control (sold separately):

• Victron Cerbo GX or other GX device (via VE.Direct — for VRM system monitoring)
• Victron GlobalLink 520 (via VE.Direct — lightweight remote monitoring)
• Phoenix Inverter Control VE.Direct Remote panel (remote on/off)

Automatic Transfer Switch (sold separately):

• Victron Filax Automatic Transfer Switch — recommended for installations requiring transfer to an external AC source with less than 20ms switchover time

---

Frequently Asked Questions

What is the difference between a PWM and an MPPT solar charger?

A PWM (Pulse Width Modulation) charger connects the solar panel directly to the battery when charging and uses pulse-width modulation to regulate current — simple, reliable, and cost-effective, but it cannot extract maximum power when panel voltage significantly exceeds battery voltage. An MPPT charger continuously tracks the panel's maximum power point regardless of battery voltage, harvesting significantly more energy across varying irradiance and temperature conditions. The Sun Inverter uses a PWM charger — appropriate for compact, low-complexity installations where maximum harvest efficiency is not the primary concern.

Does the Sun Inverter have a built-in transfer switch for switching between solar and shore power?

No. The Sun Inverter does not include a built-in automatic transfer switch. For installations requiring transfer between the inverter output and an external AC source such as a generator or shore power, the Victron Filax Automatic Transfer Switch is recommended — it provides switchover in less than 20 milliseconds, maintaining supply to computers and sensitive electronics without disruption.

What does dynamic cut-off mean for battery protection?

Dynamic cut-off adjusts the low battery voltage cut-off threshold based on the current load. Under heavy load, battery voltage naturally sags — a fixed cut-off threshold would either cut out prematurely under load or allow over-discharge at lighter loads. Dynamic cut-off sets a higher threshold under heavy load and a lower threshold under light load, protecting battery health more accurately across the full range of operating conditions.

Can I configure the solar charge algorithm for my specific battery type?

Yes. Charge current, absorption voltage, float voltage, temperature compensation, and low-temperature cut-off are all configurable via the VictronConnect app over Bluetooth. This allows the charger to be set to the specifications of your specific battery manufacturer, supporting lead acid and programmable lithium profiles.

Can I monitor the Sun Inverter remotely?

Yes — via two paths. Connect a Victron GX device (such as Cerbo GX) via VE.Direct for full system monitoring through the free Victron VRM portal from anywhere with internet access. Alternatively, connect a Victron GlobalLink 520 via VE.Direct for lightweight remote monitoring without a full GX device. Direct Bluetooth monitoring is also available locally via the VictronConnect app.