Includes all taxes

Introduction:
The controller adopts the leading PowerCatcher maximal power Tracking technology in the industry to
achieve maximal energy Tracking for solar panel, so that it can quickly and accurately trace the maximal power
point of the solar battery, acquire the maximal energy of the solar panel and significantly improve the energy
utilization ratio of the solar system. Widely applied to solar off-line photovoltaic system for managing solar panel
and storage battery in operation, the controller is the core control component of off-line photovoltaic system.
The inside of the controller possesses sound electronic failure detecting and protection function to avoid the
product component damage caused by installation error and system failure.
The controller is equipped with an LCD display screen to simultaneously support data interaction, setting
and other operations with mobile phone APP, PC upper computer and other devices.

Feature:
1、PowerCatcher maximal power Tracking technology can still trace the maximal power point of solar battery in the
complicated environment. Compared with traditional MPPT Tracking technology, it enjoys higher response speed
and higher Tracking efficiency.
2、MPPT charge efficiency is greater than traditional PWM charge efficiency by about 15% ~20%.
3、MPPT Tracking efficiency can be as much as 99.9%.
4、Adopting advanced digital power technology, the circuit energy conversion efficiency can be as much as 98%.
5、The products support lithium batteries, charging output has active voltage stabilization function. In case of open
circuit of lithium batteries or BMS overcharging protection, the storage battery end of the controller shall output
stable target voltages in time, thereby possessing good lithium electric activation function.
6、Preset a variety of battery types: lithium batteries, sealed batteries, colloidal batteries, open batteries and self-
definition.
7、Lead-acid batteries support temperature compensation function.
8、With charging line loss compensation, the voltage of the battery terminal can be accurately controlled.
9、With current-limiting charging, in case of too much battery panel power (charging current is greater than rated
current), the controller automatically reduces the charging power so that it can operate within the rated charging
current.
10、With built-in overtemperature protection mechanism, when the temperature exceeds the set temperature value,
the charging power shall decline in a linear way with the temperature.
11、It supports parallel function and breaks through the power limit of single unit. Therefore, combination of several
units can meet greater charging power.
12、With built-in bluetooth 4.0BLE module, it can achieve mobilephone APP data interaction.
13、Supporting standard Modbus protocol, it provides protocol technology support to facilitate secondary
development and application by users.
14、Programmable relay output
Description of Appearance and Interface:

①Liquid crystal display (LCD)
②Bluetooth 4.0BLE module
③Positive interface of battery
④Negative interface of battery
⑤Negative interface of solar panel
⑥Positive interface of solar panel
⑦RS485 communication interface
⑧Key
⑨TTL communication interface
⑩Battery temperature sampling interface
⑪Battery voltage sampling interface
⑫Relay output interface
Note: Negative poles of storage battery and solar battery are a common negative pole design
Remote Meter:

System Wiring Schematic Diagram:
Sepecification:
Model | MC4860N15 | MC4870N15 | MC4860N25 | MC4870N25 |
System Voltage | 12V/24V/36V/48V | |||
No-load loss | 0.54W | |||
Battery voltage | 9V~64V | |||
Maximal PV open-circuit voltage | 150V | 250V | ||
Rated charging current | 50A | 40A | ||
Maximal voltage range at | Battery voltage +2~110V | Battery voltage +2~180V | ||
Rated charging current | 60A | 70A | 60A | 70A |
Settable charging current | 0-60A | 0-70A | 0-60A | 0-70A |
Power of solar panel (12V) | 800W | 920W | 800W | 920W |
Power of solar panel (24V) | 1600W | 1840W | 1600W | 1840W |
Power of solar panel (36V) | 2400W | 2760W | 2400W | 2760W |
Power of solar panel (48V) | 3200W | 3680W | 3200W | 3680W |
Charging conversion efficiency | ≤98% | |||
MPPT tracing efficiency | >99% | |||
Temperature compensation | -3mV/℃/2V (default, settable lead-acid); no temperature compensation | |||
Communication way | TTL/Isolated RS485; baud rate 9600, digital bit 3, stop bit 1, no check bit | |||
Bluetooth | Built-in bluetooth 4.0BLE module, achieving mobilephone APP monitoring | |||
Internal temperature protection | When interior temperature of controller is higher than | |||
External temperature | The temperature is used for battery temperature compensation and | |||
Programmable relay | DPST 10A/250VAC;10A/30VDC | |||
Protection function | Battery overcharging protection, battery over discharge protection, | |||
Operation temperature | -35℃~+65℃(No derating within 40 ℃) | |||
Elevation | ≤3000m | |||
Protection grade | IP32 | |||
Weight | 3.6kg | |||
Product size | Conventional:266*194*119mm | |||
Package Include:

Item Pictures:




Payment Policy – BILLIONS BIRDS
At BILLIONS BIRDS, we are committed to providing a safe, secure, and seamless payment experience for our customers.
1. Accepted Payment Methods
We accept the following payment options:
Major Credit & Debit Cards (Visa, MasterCard, American Express)
Secure Online Payment Gateways (such as PayPal, Stripe, or other providers available at checkout)
Any additional payment methods displayed during checkout
All payments must be completed in full at the time of purchase.
2. Secure Transactions
All transactions are processed through encrypted and secure payment systems to protect your personal and financial information. We do not store your full payment details on our servers.
3. Currency
Prices are displayed in the currency indicated on the website. If you are purchasing from another country, your bank may apply currency conversion fees.
4. Order Confirmation
Once your payment has been successfully processed, you will receive an order confirmation email containing your purchase details.
5. Failed or Declined Payments
If your payment is declined, please verify your billing information or contact your bank. Orders will only be processed after successful payment confirmation.
6. Fraud Prevention
BILLIONS BIRDS reserves the right to cancel or refuse any order if fraud or unauthorised activity is suspected.
Delivery Policy – BILLIONS BIRDS
At BILLIONS BIRDS, we are dedicated to delivering your orders safely and efficiently.
1. Order Processing
All orders are processed within 1–3 business days after payment confirmation. Orders are not processed or shipped on weekends or public holidays.
2. Shipping Times
Estimated delivery times vary depending on your location:
Domestic Shipping: 3–7 business days
International Shipping: 7–15 business days
Please note that delivery times are estimates and may vary due to customs procedures, carrier delays, weather conditions, or other unforeseen circumstances.
3. Shipping Costs
Shipping fees are calculated at checkout based on your location and selected shipping method. Any customs duties, taxes, or import fees are the customer's responsibility.
4. Tracking Information
Once your order has been shipped, you will receive a confirmation email with tracking details (if available) so you can monitor your package.
5. Delivery Issues
If your order is delayed, lost, or arrives damaged, please contact us within 7 days of the expected delivery date. We will work with the shipping carrier to resolve the issue as quickly as possible.
6. Incorrect Shipping Information
Customers are responsible for providing accurate shipping details at checkout. BILLIONS BIRDS is not responsible for orders shipped to incorrect addresses provided by the customer.
Refund Policy – BILLIONS BIRDS
At BILLIONS BIRDS, customer satisfaction is our top priority. If you are not completely satisfied with your purchase, we’re here to help.
1. Return Eligibility
You may request a return within 14 days of receiving your order. To qualify for a return:
The item must be unused, unworn, and in the same condition as received.
The item must be in its original packaging.
Proof of purchase (order confirmation or receipt) is required.
Certain items may not be eligible for return, including clearance items, gift cards, or personalised/custom products.
2. Non-Refundable Items
The following items are non-refundable:
Final sale or discounted items
Gift cards
Items damaged due to misuse, negligence, or improper care
3. Return Process
To initiate a return, please contact our customer support team with your order number and reason for return. If your return is approved, you will receive instructions for returning the item.
Unless the item is defective or incorrect, customers are responsible for return shipping costs.
4. Refund Processing
Once we receive and inspect your returned item:
We will notify you of the approval or rejection of your refund.
If approved, the refund will be issued to your original payment method within 5–10 business days.
Please note that banks or payment providers may require additional time to process refunds.
5. Damaged or Incorrect Items
If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery and provide clear photos of the product and packaging. We will arrange a replacement or full refund at no additional cost.
6. Late or Missing Refunds
If you have not received your refund:
Check your bank account again.
Contact your credit card company or payment provider.
If the issue persists, don't hesitate to contact our support team for assistance.
Share your thoughts with other customers