# Trojan SIND 04 2145 · Solar battery 4V 1,647Ah

![Trojan SIND 04 2145 · Solar battery 4V 1,647Ah](https://bateriasonline.es/3027-home_default/trojan-sind-04-2145.jpg)

> Trojan SIND 04 2145: 1,647 Ah solar battery, 691×265×610 mm. VAT included, shipping cost shown before you pay, 14-day returns.

**Category:** [Solar batteries for off-grid systems](https://bateriasonline.es/en/off-grid-solar-batteries) → [Trojan](https://bateriasonline.es/en/trojan-batteries)

- **Canonical URL**: https://bateriasonline.es/en/trojan-sind-04-2145
- **Language**: en
- **Brand**: Trojan
- **Reference**: BOL-TROJAN-SIND 04 2145
- **MPN**: SIND 04 2145
- **Price**: 3.065,73 € (VAT incl., Spain)
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Trojan |
| Range | TROJAN INDUSTRIAL ENERGIA RENOVABLE - SMART CAR |
| Application | Solar and off-grid systems |
| Technology | Lead-acid |
| Voltage | 4 V |
| Capacity | 1647 Ah |
| Length | 691 mm |
| Width | 265 mm |
| Height | 610 mm |
| Weight | 211 kg |

## Quick description

The Trojan SIND 04 2145 is a solar battery with 4 V and 1,647 Ah, measuring 691 × 265 × 610 mm.

## Description

## The Trojan SIND 04 2145 at a glance

The Trojan SIND 04 2145 is made for stand-alone photovoltaic and off-grid systems. Its capacity is rated at 20 hours (C20); at slower discharge rates the usable capacity is higher.
The SIND 04 2145 belongs to the Trojan TROJAN INDUSTRIAL ENERGIA RENOVABLE - SMART CAR range. [The full range of Trojan batteries](https://bateriasonline.es/en/trojan-batteries)

## What it means that the SIND 04 2145 is lead-acid

Inside, the SIND 04 2145 is classic lead-acid: liquid electrolyte and lead plates. If the SIND 04 2145 is left discharged for weeks it sulphates: a maintenance charger prevents this.

## Trojan SIND 04 2145 vs SIND 04 1685: which one to choose?

How the SIND 04 2145 compares with Trojan batteries of similar size and capacity:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| Trojan SIND 04 2145 (this one) | 1,647 Ah | 691 × 265 × 610 | 211 kg |
| Trojan SIND 04 1685 | 1,293 Ah | 567 × 261 × 610 | 167 kg |

- Trojan SIND 04 1685: 354 Ah less, a different case (567 × 261 × 610 mm).

## Equivalents and alternatives to the Trojan SIND 04 2145

We have no other battery with exactly the dimensions and polarity of the SIND 04 2145. Browse the rest of our [solar batteries for off-grid systems](https://bateriasonline.es/en/off-grid-solar-batteries) to compare close options.

## Check this before ordering the Trojan SIND 04 2145

- Your current battery should say about 1,647 Ah; a little more is also fine.
- Length, width and height of the SIND 04 2145: 691 × 265 × 610 mm.

## Frequently asked questions about the Trojan SIND 04 2145

### SIND 04 2145 or SIND 04 1685: which one suits me?

Compared with the SIND 04 2145, the Trojan SIND 04 1685 has 354 Ah less. With 1,647 Ah, the SIND 04 2145 runs longer between charges than the SIND 04 1685 (1,293 Ah). Mind the space: the SIND 04 1685 measures 567 × 261 × 610 mm.

### How much does the Trojan SIND 04 2145 weigh?

211 kg, with 1,647 Ah of capacity. For reference, the Trojan SIND 04 1685 (1,293 Ah) weighs 167 kg.

### What are the dimensions and weight of the Trojan SIND 04 2145?

It measures 691 × 265 × 610 mm and weighs 211 kg. Compare these figures with the tray and the hold-down clamp before ordering.

## Other options if you are unsure about the SIND 04 2145

- [All solar batteries for off-grid systems](https://bateriasonline.es/en/off-grid-solar-batteries)
- [More Trojan models](https://bateriasonline.es/en/trojan-batteries)
- [Trojan SIND 02 1990](https://bateriasonline.es/en/trojan-sind-02-1990) · 1,547 Ah, 389×260×610 mm
- [Trojan SIND 02 2450](https://bateriasonline.es/en/trojan-sind-02-2450) · 1,882 Ah, 440×260×610 mm

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*bateriasonline.es — Batteries and accessories · 2026-11-11*