Frequently Asked Questions
What makes the T-105PLUS different from the standard T-105?
The biggest difference is the maintenance friendly design of the T-105 Plus. While both batteries offer the same voltage, capacity, dimensions, and overall performance ratings, the T-105PLUS includes:
- SureVent flip top vent caps for faster and easier watering
- Built-in maximum water level indicators
- Enhanced maintenance convenience
- Embedded terminals for improved durability
The standard
T-105 uses traditional bayonet style caps and supports Trojan's HydroLink watering system, while the T-105PLUS does not.
Which battery should I choose: T-105 or T-105PLUS?
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Choose the T-105PLUS if you want easier, more user friendly maintenance. It comes with flip top vent caps and built-in water level indicators, which make routine watering quicker and help reduce the chance of overfilling. This makes it a strong option for users who want dependable performance without spending as much time on upkeep.
- Choose the standard T-105 if you prefer compatibility with Trojan’s HydroLink watering system or need specific terminal configurations that may be available on certain T-105 models. It can be a better fit for users who already have HydroLink systems installed or want a more traditional maintenance setup.
From a performance standpoint, both batteries are very similar. They share the same voltage, capacity, and deep cycle design, so runtime and power output are essentially the same when new and properly maintained. The real difference comes down to how you prefer to handle maintenance. In solar systems, both batteries perform well as part of a larger battery bank. However, the T-105PLUS can make off-grid upkeep a little easier since watering is a regular part of system maintenance. That convenience can be helpful in solar setups where batteries are installed in hard to reach locations or checked less frequently. For most users, especially those focused on ease of maintenance and everyday usability, the T-105PLUS tends to be the more practical choice.
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Specification
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T-105PLUS
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T-105
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Voltage
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6VDC
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6VDC
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Capacity (20 Hr)
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225Ah
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225Ah
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Energy
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1.50 kWh
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1.50 kWh
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Weight
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62 lbs (28 kg)
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62 lbs (28 kg)
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HydroLink Watering
Compatible
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No
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Yes
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Vent Cap Style
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SureVent Flip Top Caps
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Bayonet Caps
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Water Level Indicator
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Yes
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No
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Runtime & Performance
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Excellent
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Excellent
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Maintenance Effort
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Better
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Good
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Can the T-105PLUS be used in solar power systems?
Yes. The Trojan T-105PLUS is a popular choice for off-grid and backup solar power systems. Its deep cycle design allows it to handle repeated charging and discharging, making it well suited for storing energy generated by solar panels. Whether used in a cabin, RV, remote site, or residential backup system, the T-105PLUS delivers reliable, long lasting performance when properly maintained and charged according to manufacturer recommendations. With a 225Ah capacity, the T-105PLUS provides substantial energy storage for powering lights, appliances, electronics, and other DC or inverter powered loads. Multiple batteries can be wired together to create larger 12V, 24V, or 48V battery banks to meet higher energy demands. The battery's durable construction and proven deep cycle technology make it a trusted option for renewable energy applications where dependable energy storage is essential. To maximize battery life and performance in a solar installation, it is important to use a quality solar charge controller, maintain proper charging voltages, and regularly check water levels. When properly cared for, the T-105PLUS can provide years of reliable service in solar energy systems.
Charging & Maintenance
Is the T-105PLUS a maintenance free battery?
No. The Trojan T-105PLUS is a flooded lead acid battery and is not maintenance-free. Like all flooded batteries, it requires periodic inspection and watering to maintain proper electrolyte levels and ensure optimal performance. Regular maintenance is essential for maximizing battery life, preserving capacity, and preventing damage caused by low electrolyte levels. The T-105PLUS is designed to make maintenance easier than many traditional flooded batteries. It features Trojan's SureVent flip top vent caps, which provide quick access to the battery cells, along with built-in maximum water level indicators that help reduce the risk of overfilling. These features simplify routine maintenance and make it easier for users to keep their batteries in good condition. In addition to checking water levels, owners should periodically inspect battery terminals for corrosion, keep the battery top clean and dry, and ensure all connections remain secure. Using a charger that follows Trojan's recommended charging profile can also help improve battery performance and longevity. While maintenance free options such as AGM batteries are available, many users choose the T-105PLUS because flooded batteries typically offer excellent deep cycle performance, proven reliability, and a lower cost per cycle when properly maintained. With routine care, the T-105PLUS can provide years of dependable service in golf carts, RVs, solar energy systems, marine applications, and other deep cycle power systems.
How often should I check the water level for my T-105PLUS?
Trojan recommends inspecting water levels regularly to help maximize battery performance and lifespan. For most applications, checking the water level once per month is sufficient. However, batteries that are used frequently, operated in hot environments, or subjected to heavy charging and discharging cycles may require more frequent inspections. Always check water levels after the battery has been fully charged, as electrolyte levels rise during charging. If water is needed, use only distilled water and fill the cells to the recommended level. Avoid overfilling, as excess electrolyte can overflow during charging and potentially cause corrosion or reduce battery performance. One advantage of the T-105PLUS is its built-in maximum water level indicator and SureVent flip top caps, which make watering faster and help prevent overfilling. Regular maintenance and proper watering are among the most important steps you can take to extend battery life and ensure dependable performance.
What happens if I do not add water when needed?
Failing to maintain proper electrolyte levels can cause permanent damage to the battery. When electrolyte levels fall below the tops of the battery plates, portions of the plates become exposed to air, causing oxidation and irreversible capacity loss. Low water levels can also increase battery temperatures during charging, accelerate corrosion, and reduce overall battery life. Regular inspections and proper watering are simple maintenance tasks that can significantly extend battery longevity.
How do I know when the battery needs water?
The T-105PLUS features built-in maximum water level indicators that make it easier to determine the proper fill level. During routine maintenance, remove the flip top vent caps and inspect the electrolyte level in each cell. If the electrolyte level is below the recommended range, add distilled water until the proper level is reached. Avoid overfilling, as electrolyte expansion during charging can cause overflow and corrosion around the battery terminals.
Can I overcharge a T-105PLUS battery?
Yes. Overcharging can cause excessive gassing, increased water consumption, elevated battery temperatures, and accelerated internal corrosion. Chronic overcharging can significantly shorten battery life, reduce capacity, and lead to premature battery failure. When a battery is overcharged, electrical energy that can no longer be stored is converted into heat and gas. This process causes water in the electrolyte to break down into hydrogen and oxygen, resulting in increased water loss and more frequent maintenance. If overcharging continues for extended periods, the battery's internal components can deteriorate, reducing both performance and overall lifespan.
This is especially important in solar power systems, where batteries are charged daily by solar panels. A properly configured solar charge controller plays a critical role in preventing overcharging. The charge controller regulates the voltage and current coming from the solar array and automatically adjusts charging as the battery approaches full capacity. Without a correctly programmed controller, batteries may remain at elevated charging voltages for too long, leading to excessive gassing, overheating, and accelerated wear. To protect your T-105PLUS battery in a solar installation, use a quality charge controller and ensure it is programmed according to Trojan's recommended charging specifications for flooded lead acid batteries. Many modern MPPT and PWM charge controllers offer customizable charging settings, including bulk, absorption, float, and equalization stages. Properly configured charging helps ensure the battery receives a complete charge while minimizing the risk of damage from overcharging.
It's also important to remember that solar charging conditions can vary throughout the year. Seasonal changes, high temperatures, oversized solar arrays, or improperly configured charging equipment can increase the risk of overcharging if system settings are not monitored. Periodically reviewing charge controller settings and checking battery water levels can help identify potential issues before they affect battery performance. When properly charged and maintained, the Trojan T-105PLUS can provide years of reliable service in off-grid and backup solar applications. Preventing overcharging is one of the most important steps solar system owners can take to maximize battery life and get the best return on their investment.
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