3.5kW Off-Grid Solar Power System with 48V 74Ah Battery Storage & 6×440W Panels

Name: 3.5kW Off-Grid Solar Power System with 48V 74Ah Battery Storage & 6×440W Panels
Brand: ROCKSOLAR
Price: 3299.99 USD
Availability: InStock

$3,299.99 ~~$7,999.99~~

Shipping calculated at checkout.

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Support parallel operation for capacity expansion up to 21kW

Integrated MPPT charge controller.

WIFI remote monitoring

Generator Connection ready

Description

Off-Grid Solar Kit — 3.5 kW Inverter (SPF3500TL) + 48V 74Ah Battery + 6 × 440W PanelsQuick Overview

This turnkey off-grid kit pairs a 3.5 kW inverter (SPF3500TL) with a 48V 74Ah lithium battery and six 440W solar panels. It’s designed for cabins, RVs, small farm outbuildings, remote work sites, and backup power for homes. The kit balances solar generation, energy storage, and inverter capacity for reliable off-grid performance.

Core Components

Off Grid Inverter: SPF3500TL — 3.5 kW continuous output (pure sine wave recommended for sensitive electronics).
Dakota Lithium Battery: 48V, 74Ah (48 × 74 = 3552 Wh nominal energy).
Solar array: 6 × 440W Solar Panels = 2640 W nominal DC (6 × 440W = 2640 Watt).
Recommended charge controller: MPPT, ≥ 60 A @ 48V (see calculations below).
Mounting, cabling, fuses, breakers, and safety equipment included or specified per site.

SPECIFICATIONS

inverter model	SPF3500TL
inverter continuous output power	3.5 kW (pure sine wave)
battery voltage	48 V
battery capacity	74 Ah
battery nominal energy	3552 Wh
solar panels	6 × 440 W panels
solar array nominal power	2640 W DC
recommended charge controller	mppt, ≥ 60 A @ 48 V
included accessories	mounting hardware, cabling, fuses, breakers, safety equipment (site dependent)