Trojan SIND 04 2145 · Solar battery 4V 1647Ah
Specifications
| Brand | TROJAN |
|---|---|
| Part number | SIND 04 2145 |
| Voltage (V) | 4 |
| Capacity (C20) | 1647Ah (c20) |
| Capacity (C10) | 1474Ah (c10) |
| Technology | Lead-acid |
| Length | 691.00 mm |
| Width | 265.00 mm |
| Height | 610.00 mm |
€3,128.30
VAT included
4,64/5★★★★★11 reviewsVerified purchases
- ★★★★★Daniel Martinez:
Recibí en plazo. Todo ok
- ★★★★Jose Luis Carrasco:
Pedí la batería un jueves a las 5 y me llegó el viernes a las 7
- ★★★★Jose Ignacio Moya:
Compre la TROJAN SIND 04 2145 y llamé para que me ayudaran con la instalación. Muy buena asesoría
Trojan SIND 04 2145 4V 1647Ah is a solar battery designed for PV systems with daily charge/discharge cycles. Tolerates extreme temperatures well, with low self-discharge during winter shutdowns or between stays at vacation homes.
Why this solar battery?
- Designed for solar systemsoptimised for daily charge/discharge cycles
- Handles extreme temperaturesin technical rooms or outdoor installs
- Minimal self-dischargewhen left idle over winter or holidays
Voltage
4 V
Capacity
1647 Ah
Dimensions
691×265×610 mm
Technology
Lead-acid
Weight
211 kg
Model
TROJAN INDUSTRIAL ENERGIA RENOVABLE - SMART CAR
Solar battery Trojan SIND 04 2145 Industrial Energia Renovable - Smart Car 1,647Ah 4V
4VVoltage
1,647AhCapacity
211kgWeight
For off-grid photovoltaic installations and storage systems, the Trojan SIND 04 2145 from the Industrial Energia Renovable - Smart Car range stores 1,647 Ah with conventional lead-acid technology through daily charge and discharge cycles. It replaces the original battery without adaptation in off-grid PV systems with a 691 × 265 × 610 mm format: same 1,647 Ah capacity.
- Conventional lead-acid: the most proven and economical technology.
- Optimised for daily charge and discharge cycles.
- Good tolerance to extreme temperatures.
- Long life on float and moderate cycling.
What the Trojan SIND 04 2145 is for
Designed for off-grid photovoltaic installations and storage systems, the Trojan SIND 04 2145 tolerates extreme temperatures and long periods of low activity. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 211 kg.
Will it fit your current battery tray?
It has external dimensions of 691 × 265 × 610 mm and weighs 211 kg. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.
Trojan: the maker behind the SIND 04 2145
Trojan Battery is the world reference in deep-cycle batteries: golf carts, cleaning machines, aerial platforms and solar systems rely on its T2 technology and longevity. All the Trojan batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.
The Trojan SIND 04 2145: Industrial Energia Renovable - Smart Car range and conventional lead-acid technology
The Industrial Energia Renovable - Smart Car is the Trojan range the SIND 04 2145 belongs to: it shares the same construction and quality criteria with the rest of the series, and varies in capacity and format to suit each vehicle.
Conventional lead-acid is the benchmark against which other technologies are compared: good cranking current, great tolerance to alternator charging and the best price per amp-hour.
Care and maintenance
In the darker months, check the voltage periodically and avoid full discharges. Size the installation so as not to discharge the battery more than 50% daily and set the controller to the battery technology.
Manufacturer's warranty
The Trojan SIND 04 2145 comes with the manufacturer's official warranty against manufacturing defects. If it fails through a defect within the warranty period, we replace it at no cost to you.
When you get it and how to return it
Orders placed before 6:00 pm with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic and Canary Islands and the rest of the European Union allow 3 to 5 working days. You have 14 days to return an unused battery; in mainland Spain and Portugal collection is free. We email you the tracking number as soon as the parcel ships.
BCOM-TROJAN-SIND 04 2145
Data sheet
- Brand
- TROJAN
- Reference
- SIND 04 2145
- Model
- TROJAN INDUSTRIAL ENERGIA RENOVABLE - SMART CAR
- Voltage (V)
- 4
- Length
- 691.00 mm
- Width
- 265.00 mm
- Height
- 610.00 mm
- Weight
- 211 Kgs
- Technology
- Lead-acid
- Capacity (C20)
- 1647Ah (c20)
- Capacity (C10)
- 1474Ah (c10)
Specific References
- MPN
- SIND 04 2145
4,64/5
Verified purchasesLatest verified reviews
★★★★★Daniel Martinez
12/02/2026Gratamente sorprendido
Recibí en plazo. Todo ok
★★★★★Jose Luis Carrasco
09/01/2026Me llegó al día siguiente
Pedí la batería un jueves a las 5 y me llegó el viernes a las 7
★★★★★Jose Ignacio Moya
23/12/2025Gran asesoramiento
Compre la TROJAN SIND 04 2145 y llamé para que me ayudaran con la instalación. Muy buena asesoría
★★★★★Ricardo Jimenez
23/11/2025Asesoramiento gratis
Tenía algunas dudas sobre la instalación de la bateria y me la resolvieron
Recommended accessories
How to change the battery
Guide to replace a cyclic battery (12V 4-30Ah) for UPS, mobility scooter, alarm or backup device. Estimated time 10-15 minutes. Important: discharge residual voltage before handling.
Step 1. Power off and unplug the device
Unplug the device (UPS, scooter, alarm) and leave it off for at least 30 seconds to discharge residual capacitor voltage. Work on an insulating surface.
Step 2. Locate the battery compartment
Usually under the seat (mobility scooter/wheelchair), in the rear module of the UPS, or behind a side panel with screws. Check the device manual for unusual models.
Step 3. Disconnect the negative (−) first
With insulated gloves, remove the negative (−) cable first. Some UPS have protection fuses — note their position before removing.
Step 4. Disconnect the positive (+) terminal
Repeat with the positive cable (red, marked +). Important: never let a terminal touch metal of the car while the other is still connected.
Step 5. Remove the old battery
Typical weight 1-15 kg depending on capacity. Many cyclic batteries are AGM/GEL — keep them upright. Do NOT invert the battery: even sealed, residue may exist.
Step 6. Fit the new battery
Same orientation and type (AGM, GEL or flooded). Polarity must match the device, not a chassis (this is not a car). Make sure terminals do not touch metal parts of the compartment.
Step 7. Connect the positive (+) first
On cyclic devices the order is reversed compared to cars: positive (+) first, negative (−) afterwards. Tighten without forcing — the plastic terminal housing of cyclic batteries damages easily.
Step 8. Initial charge before first use
Cyclic batteries ship at 60-80%. Before first use, connect the device charger for 8-12 hours (or use an AGM/GEL smart charger if available). This avoids short cycles and extends lifespan.
Frequently asked questions
How do I fit the SIND 04 2145 model in my device?
In most devices it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on this page. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On devices with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile.
How many years does this battery last?
Expected lifespan of the Trojan SIND 04 2145 is 4 to 6 years in regular device use without Start-Stop. In cold regions it drops slightly due to cold-start stress; in very hot regions it also drops because of electrolyte evaporation. To extend its life: avoid deep discharges (headlights on with engine off), have the alternator checked yearly, and keep the battery clean and properly secured.
What are the dimensions of the Trojan SIND 04 2145 battery?
Dimensions (length × width × height) are 691×265×610 mm — also written as 691x265x610 mm — following the European DIN standard. Always measure the space in your device before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals.
Which batteries are equivalent to the Trojan SIND 04 2145?
Directly interchangeable batteries (same dimensions, same polarity, same Ah and CCA) are the OEM equivalents from leading brands: Bosch, Tudor, Exide and, depending on the model, Banner or Yuasa. Exact equivalence depends on technology — an EFB cannot be replaced with a conventional battery in Start-Stop devices. See the "Equivalents" section to view recommended options at the same performance level.
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