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

Name: Rocksolar 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.

Quick Specs

Inverter: SPF3500TL, 3.5 kW continuous output (pure sine wave)
Battery: 48V 74Ah (3552 Wh nominal energy)
Solar Panels: 6 × 440W panels (2640 W total)
Charge Controller: MPPT, ≥ 60 A at 48V
Includes: Mounting, cabling, fuses, breakers, safety equipment
Applications: Cabins, RVs, small farm buildings, remote work sites, home backup

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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

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