Solar Panel Systerm Solar Controller SR500

Product quality and reasonable price are always the base of our development. We have industry certificates such as ISO9001:2000, and a completed quality control system. Our team continuously improve the service, delivery, and other works to build a win-win cooperation with our customers.

If you are interested in any of our products, please feel free to contact us for further information. We look forward to becoming your business partner in the near future.

1.Warranty: 2 years.

2. Factory price, pricing could be lower while the quantity rising.

3. OEM cooperation with your brand, Could have your logo, or change the capacity as your   design.

4. Strict QA, QC process, guarantee the quality and delivery time.

5. One of the largest storage battery, uninterruptable power supply and inverter manufactures in China.

Q1: What is your terms of payment?

   A: 1.Sample: 100% of the sample cost before sampling.

       2. Mass Production: 30% deposit in advance, 70% balance when finished.

       3. Payment terms: usually T/T, also support West Union, PayPal, etc

Q2: What’s kinds of battery will you provide?

   A: All the specification can be customized, such as the parameter of 2v, 4v, 6v, 10v, 12v batteries.

Q3: Can you print my logo on the battery cover?

   A: Yes, OEM is available, we can print your logo on the battery case, and you can offer your logo.

Q4: What’s the delivery time?

  A: 1.Sample ready in 7-15 days, depends on the requests.                                              

       2. Mass production ready in 15-30 days, depends on the qty & factory’s producing.

Q5: How to maintain the battery?
   A: The battery should be stored in clean, dry, ventilated, dark environment when not using, keep it after full charge, and recharge it every 3 months or 6 months.

Q6: If a battery fails, what will be the indications?
   A: 1.Lower performance 
       2.Low voltage 
       3.Cannot charge/recharge 
       4.Swelled container 
       5.Acid corrosion

Q7:If there are defective batteries in the warranty, what’s your policy to replace them?

    A: Please take the photos of the broken batteries for us and tell us what happen, if everything is confirmed, the new ones will be sent to you as compensation in the next order.

Hunan Coowone Trading Co., Ltd.

Contact Name: Sharon Tang

Whatspp/Wechat: 0086 15700798770

Skype/Email: sales11(at)

Ali TM: cn1517813620rddc

Website: https://coowone.en.china.cn

Add: R3116, IDO Building, No.49, Kaiyuan Road, Xingsha Town, Changsha City, Hunan Province.