Solar batteries are one of the most important parts of a solar panels system especially for those who are going to live completely off the grid or are building a back-up system.
The batteries store the solar power generated and discharge the power as needed. The battery bank consists of one or more solar deep-cycle type batteries. Depending on the current and voltages for certain applications the batteries are wired in series and/or parallel to obtain the required voltage and/or amp hours.
Regular car batteries cannot be used in a renewable energy system because they are not designed to be cycled, they must be deep-cycle type batteries flooded or gelled.
Trojan deep cycle batteries are flooded lead-acid and are built for uncompromising performance, reliability and value. These have been the batteries of choice for most stand alone PV power systems and RV uses. Include an 18 month free replacement warranty.
Trojan Battery Company has had a long history of innovation and achievement in the energy arena. From its roots in developing the first deep cycle battery for electric golf car applications to today’s research in Bipolar technology.
Trojan scientists and engineers have also made numerous advancements in the electrochemical field. The Alpha Plus™ paste formulation and Maxguard™ Advanced Design Separators are just two of their numerous accomplishments. Trojan Battery Company has been building batteries since 1925 and has achieved a dominant leadership role in deep cycle lead acid batteries. As a result, the company occupies a unique position to institute new procedures that can benefit battery buyers.
Proprietary Alpha Plus Paste Formulation More Lifetime Energy Units (LEUs)
Maxguard™ Advanced Design Separator Maximum run time.
Longer cycle life Greater cycle life, what we really like is the Lower end-of-charge current which means Lower electricity costs, Reduced water consumption means Less battery maintenance, a convenient Flag terminal for 3/8″ bolts.
Trojan L-16 Deep Cycle Battery-
6 volt, 395 amp-hr @ 20 hr rate. Rated at 500 cycles. Typical life: 7-10 years in normal service. Dimensions: 12″L x 7″W x 17″H. Weight: 124lbs.One of the best selling batteries for renewable energy.
L-16 and T-105 batteries have 18 month free replacement.
Trojan T-105 Deep Cycle Battery-
For smaller systems, we recommend the Trojan T-105. These batteries cost about the same as marine or “RV” batteries, but will outlast them two to one. 6 volt, 220 amp-hr @ 20 hr rate. Rated at 300 cycles. Typical life: 3-4 years in normal service. Dimensions: 11″L x 7″W x 12″H.Weight: 61 lbs.
By far the finest “golf-cart” battery that we’ve found. Far superior to all others.
Do you want to figure out how many batteries you need, follow this simple to use solar batteries chart to determine the right number of batteries for your solar panels.
1. Enter your daily amp-hour requirement ( Appliance etc.. amp-hour usage).
2. Enter the maximum number of consecutive cloudy weather days expected in your area, or the number of days of autonomy you would like your system to support.
3. Multiply the amp-hour requirement by the number of days (line 1 x line 2). This is the amount of amp-hours your system will need to store.
4. Enter the depth of discharge for the battery bank you have chosen. This provides a safety factor so that you can avoid over-draining your battery bank. (Example: if the discharge limit is 20%, use 0.2.)
This number should not exceed 0.8.
5. Divide line 3 by line 4
6. Select the multiplier below that corresponds to the average wintertime ambient temperature.
7. Multiply line 5 by line 6. This calculation ensures that your battery bank will have enough capacity to overcome cold weather effects. This number represents the total battery capacity you will need.
8. Enter the amp-hour rating for the battery you have chosen.
9. Divide the total battery capacity by the battery amp-hour rating and round off to the next highest number. This is the number of batteries wired in parallel required.
10. Divide the nominal system voltage (12V, 24V, or 48V) by the battery voltage and round off to the next highest number. This is the number of batteries wired in series.
11. Multiply line 9 by line 10. This is the total number of batteries required.
Solar batteries, usually deep cycle batteries are a very important part of your solar panels system.