Frequently Asked Questions
General Questions
What type of battery is the Crown CR-215?
The Crown CR-215 is a 12VDC commercial deep cycle flooded lead acid battery rated at 215Ah at the 20-hour rate. It is designed for repeated charge and discharge cycles in applications such as solar energy storage, renewable energy systems, backup power, RVs, marine equipment, and industrial systems.
What capacity does the Crown CR-215 provide at different discharge rates?
The Crown CR-215 has different capacity ratings depending on the discharge rate:
- 215Ah at the 20-hour rate
- 175Ah at the 5-hour rate
- 118Ah at the 75-hour rate
The available capacity changes with discharge rate, so battery-bank sizing should use the rating that best represents the intended operating conditions.
How much energy does the Crown CR-215 provide?
The Crown CR-215 is rated at 1.25 kWh at the 20-hour rate and 2.79 kWh at the 100-hour rate. Actual usable energy depends on discharge rate, temperature, battery condition, system losses, and the depth of discharge selected for the application.
Is the Crown CR-215 suitable for off-grid solar systems?
Yes. The Crown CR-215 is well suited to off-grid solar systems that are designed for flooded lead acid batteries. It can provide energy storage for loads when properly sized and maintained, and it can be combined with matching batteries to create larger battery banks.
What makes the Crown CR-215 useful for larger solar battery banks?
The Crown CR-215 provides 215Ah at 12VDC, allowing a single battery to provide more rated capacity than lower-capacity 12VDC models. This can help reduce the number of batteries required for some system designs while still allowing series and parallel configurations when additional voltage or capacity is needed.
Charging & Maintenance
What type of solar charge controller should be used with the Crown CR-215?
The Crown CR-215 should be charged with a solar charge controller configured for flooded lead acid batteries. Charging parameters should follow Crown's recommended requirements and match the voltage and configuration of the complete battery bank.
Does the Crown CR-215 require watering?
Yes. The Crown CR-215 is a flooded lead acid battery and requires periodic electrolyte inspection and watering. Use distilled or de-mineralized water and maintain the electrolyte at the proper level according to Crown's maintenance recommendations.
What is the reserve capacity of the Crown CR-215?
The Crown CR-215 provides 429 minutes of reserve capacity at a 25-amp discharge rate. Reserve capacity changes with the discharge rate, so this rating should be considered alongside the actual loads and operating conditions of the system.
Why does the Crown CR-215 need proper ventilation?
The Crown CR-215 is a flooded lead acid battery and can release hydrogen gas during charging. It should be installed in a properly ventilated location and kept away from sparks, flames, cigarettes, and other ignition sources.
What maintenance should be performed on the Crown CR-215?
Regular maintenance should include:
- Checking electrolyte levels
- Inspecting terminals and cable connections
- Checking for corrosion or physical damage
- Confirming proper charging performance
- Inspecting the complete battery bank
Crown Battery Comparison
How does the Crown CR-215 compare with the Crown CR-195?
The Crown CR-195 and Crown CR-215 are both 12VDC commercial deep cycle flooded lead acid batteries with a BCI Group 921 profile. The Crown CR-215 provides 215Ah at the 20-hour rate compared with 195Ah for the Crown CR-195. It also provides higher rated energy and reserve capacity, while both models share the same listed dimensions.
| Specification |
CR-195 |
CR-215 |
| Voltage |
12VDC |
12VDC |
| Capacity (20 Hr) |
195Ah |
215Ah |
| Capacity (5 Hr) |
160Ah |
175Ah |
| Storage kWh (20 Hr) |
1.13 kWh |
1.25 kWh |
| Reserve Capacity |
370 min @ 25A |
429 min @ 25A |
| Dimensions |
15.50 x 7.00 x 14.63 in (39.4 x 17.8 x 37.2 cm) |
15.50 x 7.00 x 14.63 in (39.4 x 17.8 x 37.2 cm) |
| Weight |
110 lbs (49.9 kg) |
120 lbs (54.4 kg) |
| Terminal Type |
Dual post/Stud combination |
Dual post/Stud combination |
What is different about the Crown CR-215 compared with the Crown CR-185?
The Crown CR-215 and CR-185 share the same 12VDC configuration, BCI Group 921 profile, and listed dimensions. The CR-215 provides 215Ah compared with 185Ah for the CR-185, along with higher rated energy and reserve capacity. The CR-215 is heavier, but it can be useful when greater capacity is needed within the same battery size.
| Specification |
CR-185 |
CR-215 |
| Voltage |
12VDC |
12VDC |
| Capacity (20 Hr) |
185Ah |
215Ah |
| Capacity (5 Hr) |
150Ah |
175Ah |
| Storage kWh (20 Hr) |
1.08 kWh |
1.25 kWh |
| Reserve Capacity |
326 min @ 25A |
429 min @ 25A |
| Dimensions |
15.50 x 7.00 x 14.63 in (39.4 x 17.8 x 37.2 cm) |
15.50 x 7.00 x 14.63 in (39.4 x 17.8 x 37.2 cm) |
| Weight |
107 lbs (48.5 kg) |
120 lbs (54.4 kg) |
| Terminal Type |
Dual post/Stud combination |
Dual post/Stud combination |
Solar Application & Battery Life
How should the Crown CR-215 be sized for an off-grid solar system?
Sizing should consider daily energy use, required backup time, system voltage, inverter efficiency, solar production, charging capability, and the desired depth of discharge. The battery bank should be large enough to meet expected loads while allowing the solar array and charge controller to properly recharge the batteries.
Can multiple Crown CR-215 batteries be connected together?
Yes. Matching Crown CR-215 batteries can be connected in series to increase battery-bank voltage or in parallel to increase total amp-hour capacity. The complete system should use properly sized cables, protection devices, charging equipment, and inverter components.
How can I help extend the service life of the Crown CR-215?
Proper charging, regular electrolyte inspection, correct watering, adequate ventilation, clean connections, and avoiding unnecessary deep discharges can help support longer battery service life. Operating temperature and overall battery maintenance also affect performance and longevity.
Can the Crown CR-215 be installed on its side?
No. The Crown CR-215 is a flooded lead acid battery containing liquid electrolyte and should be installed upright. Upright installation also allows the battery to be inspected and maintained properly.
What should I check if the Crown CR-215 is not performing as expected?
Start by checking the battery state of charge, solar charge controller settings, cable connections, terminal condition, electrolyte level, and recent discharge history. Undercharging, excessive discharge, high temperatures, poor connections, low electrolyte, and normal battery aging can all affect battery performance.
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