SRNE Shiner 12V/24V MPPT Solar Charge Controller with Bluetooth 20A

The SRNE Shiner 12V/24V MPPT Solar Charge Controller with Bluetooth 20A is a solar charge controller for people building home, RV or off-grid solar systems in Bangladesh. According to the listing, it uses MPPT tracking to optimise energy harvest from solar panels. It suits buyers who want one controller for either a 12V or a 24V battery bank.

• SRNE Shiner 12V/24V overview
• Key features
• Specifications
• How to use / set up
• Compatibility and what is in the box
• Who should buy it in Bangladesh
• Alternatives in our store
• Warranty and support
• Delivery, returns and ordering
• Frequently asked questions

SRNE Shiner 12V/24V overview

The SRNE Shiner 12V/24V is described in the listing as a high-efficiency solar controller designed to optimise energy harvest from solar panels. It sits in our Solar & Electrical range, where shoppers compare controllers, cables, batteries and testers for the same system. Looking at related items before you decide can save time.

With advanced MPPT (Maximum Power Point Tracking) technology, the SRNE Shiner 12V/24V is listed as offering up to 99% tracking efficiency and faster charging compared to PWM controllers. The maker lists the tracker as adjusting the panel input to maximise power output under varying sunlight. Read these figures as the maker’s stated values rather than as guarantees for every installation.

The first question for any buyer of the SRNE Shiner 12V/24V is the size of the system. According to the listing, it suits home, RV and off-grid solar systems. A controller of this kind sits between your solar panels and your battery bank, so its settings and limits shape how the whole system charges. The listing also describes temperature protection that reduces charging when the unit gets too hot, which matters in the heat of a Bangladeshi summer. The listing shows a 20A rating within a 20A / 30A / 40A series, so compare that rating with your array before you order.

Key features

Automatic 12V / 24V voltage detection

The listing says the controller automatically senses battery voltage, so there is less manual setup. For a first-time solar buyer this is a helpful step, because choosing the correct battery voltage is basic. The SRNE Shiner 12V/24V is listed as supporting both voltages, so one model can suit either battery layout. Check which voltage your battery bank uses before you connect anything, and follow the maker’s instructions for wiring.

Bluetooth monitoring with the BT-2 module

According to the listing, Bluetooth works through an external module called the BT-2. With the module and the mobile app, you can monitor system status, battery voltage, charging current and PV input from your phone. For a household with the array on the roof, checking readings from indoors is the practical benefit. The SRNE Shiner 12V/24V is listed with this connection option, but whether the module comes with the controller is not confirmed by the listing.

Lead-acid and lithium battery support

The listing states that the controller supports both lead-acid and lithium batteries. Charging profiles differ between battery chemistries, and the listing says you can set the controller up for the type you use. If you are moving from an older lead-acid bank to lithium, match the settings to your battery maker’s guidance. The SRNE Shiner 12V/24V therefore suits mixed or changing battery plans, though the detailed charging settings are not described in the listing.

MPPT tracking and charging speed

MPPT stands for Maximum Power Point Tracking, the term the listing uses. According to the listing, the tracker adjusts the panel input to maximise power output as sunlight changes, and the maker claims up to 99% tracking efficiency. The listing also states faster charging compared to PWM controllers. The SRNE Shiner 12V/24V is presented as an MPPT controller, so read the 99% figure as the maker’s stated value.

Protection and safety features

The listing names overcharge, over-discharge, short-circuit and reverse polarity protection. It also describes temperature protection that reduces charge if the unit gets hot, over-voltage protection and current limitation. Those features help guard the battery and the SRNE Shiner 12V/24V against common faults. They do not replace correct wiring, suitable fusing or advice from a qualified installer. Follow the maker’s instructions and keep connections secure.

Load output and control

For the SRNE Shiner 12V/24V, the listing says the controller can support load control, so loads can be switched on or off by time or with a light sensor. It also protects against the battery hanging at low voltage, as the listing puts it. A typical use is a lighting circuit that should only run in the evening. The load control is described in general terms only, so the detailed set-up is a matter for the maker’s instructions.

Specifications

The table below sets out the specifications for the SRNE Shiner 12V/24V as the product listing gives them.

These are listed specifications from the product listing.

How to use / set up

Setting up a solar controller is simpler when you work through the steps in order and keep the maker’s instructions to hand. The listing does not give a full set-up sequence, so the advice here is general. Follow the maker’s instructions for the SRNE Shiner 12V/24V at every stage, and treat this section as an overview only.

Step one is to confirm the battery bank voltage and chemistry. The listing says the controller recognises 12V or 24V and supports lead-acid and lithium batteries, so know which applies to your bank before you start. Write the battery type down, because you will need it when you set the controller up.

Step two is to charge the battery fully before first use, then check that it is in good order before you connect it. A battery that has been stored for a long time should be checked before it joins the system. Do not skip this step, even if the battery looks new.

Step three is to connect the components following the maker’s instructions for the connection order. Make sure every connection is secure and tidy before you switch anything on. Keep cable runs as short and neat as the layout allows, and take care when working near battery terminals.

Step four is to set the battery type that matches your chemistry, using the controls the maker provides. Set it correctly from the start, because the charging profile depends on it. If you want remote readings, add the external BT-2 module and follow the maker’s app instructions.

Step five is to watch the readings for the SRNE Shiner 12V/24V over the first few days. Use the mobile app or the LCD display to check battery voltage and charging current, and note anything unusual so you can raise it with us. A simple log of readings makes it easier to spot changes over time.

Routine care for the SRNE Shiner 12V/24V is simple. Keep connections clean, dry and tight, and check them at intervals. Keep the unit away from direct heat sources, and follow the maker’s care instructions.

If you need to store a spare battery or controller, keep it in a clean, dry place away from children, and follow the battery maker’s storage guidance. Check the battery voltage at intervals while the system is idle, because a battery left unchecked for a long time can change.

In Bangladesh, humidity and heat can be hard on electrical connections. Inspect terminals and cable ends regularly, particularly during the rainy months, and clean or tighten them when needed. A few minutes of checking each month is a sensible habit for any home solar set-up.

For background reading on a different kind of controller, see a general reference on gamepads. It does not describe solar equipment, so use it only for background.

Compatibility and what is in the box

The listing does not state the package contents, so this page does not list them. Ask us before you order if you need to know exactly what arrives with the controller.

Confirmed in the listing: 12V and 24V battery systems through auto recognition, lead-acid and lithium batteries, PV input up to 60V (VOC), an LCD display, Bluetooth through the external BT-2 module, and use in home, RV and off-grid solar systems. These points are the basis for judging whether the SRNE Shiner 12V/24V fits your system.

The listing gives the 60V (VOC) figure as the maximum PV input, so an array whose open-circuit voltage stays within that limit is the one to compare. Keep this figure in mind when you plan how panels are wired together in series, because the total voltage adds up.

The listing does not state the connector type, the cable sizes or whether the BT-2 module is supplied with the controller. Treat those points as open questions rather than assumptions, and check them with our team if they matter to your installation.

Compatibility with other brands of panel or battery is not confirmed by the listing. Check your panel’s open-circuit voltage against the 60V (VOC) figure, and your battery bank voltage against the 12V or 24V recognition, before you order.

Who should buy it in Bangladesh

The SRNE Shiner 12V/24V suits buyers who are building or extending a solar set-up at home and want a controller that handles either a 12V or 24V battery bank.

Scenario one is a household in Dhaka with a rooftop array that wants to store solar power for use during load-shedding. This buyer benefits from the battery-type support and the Bluetooth option on the SRNE Shiner 12V/24V, which lets them check the array without going up on the roof. Clear readings help the household plan when to run heavier appliances.

Scenario two is an owner of a camper or RV who runs a 12V or 24V battery system. The SRNE Shiner 12V/24V is presented for RV use, and the automatic voltage recognition reduces setup work when the battery system changes between trips.

Scenario three is a small off-grid cabin or holiday home with a lithium battery pack. The listed lithium support and the load control described in the listing are relevant here, provided the settings follow the battery maker’s guidance. Think through your loads over a typical day before you order.

Scenario four is a buyer upgrading from an older lead-acid bank to lithium over time. The listed support for both chemistries keeps the options open, although the charging settings should always match the battery maker’s guidance.

Scenario five is a homeowner with a modest roof array who wants a single controller such as the SRNE Shiner 12V/24V, with protection features and remote readings. The listing names overcharge, over-discharge, short-circuit and reverse polarity protection, and the BT-2 module adds remote monitoring.

Scenario six is a buyer who likes to check system data from a phone. The listing says a mobile app works with the BT-2 module to show status, battery voltage, charging current and PV input for the SRNE Shiner 12V/24V.

Who should look elsewhere: if your system calls for a different rating in the series, compare the SRNE Shiner 12V/24V with the 30A version in the alternatives section below. If you only need a cable, connector or tester, the other items in our range may suit you better.

Alternatives in our store

If the SRNE Shiner 12V/24V is not quite the right fit, you can browse these related items in our store. The SRNE Shiner 12V/24V MPPT Solar Charge Controller with Bluetooth 30A is another MPPT solar charge controller in our range.

The YRO 30A 1000V Solar Connector for PV Systems is a solar connector in our Solar & Electrical category. The GearUP 12V 100Ah LifePO4 Lithium Battery with Smart BMS + Bluetooth is a lithium battery in our range. The Non-Contact Voltage Tester 12-1000V Digital Voltage Tester (Mestek AC40) is a digital voltage tester in our range.

Browse the full Solar & Electrical category to see everything else we stock for solar systems.

Warranty and support

Warranty: 1 Year seller warranty.

Delivery, returns and ordering

Here is how buying the SRNE Shiner 12V/24V works with us. We deliver all over Bangladesh and you pay cash on delivery. Delivery usually takes 1–3 days inside Dhaka city and 2–5 days outside Dhaka. You can return it within 7 days of delivery (see our Delivery & Returns policy). Questions before ordering: call 09638054751, message us on Facebook Messenger or email care@gadgetsuperb.com.

Ordering is straightforward. Choose the SRNE Shiner 12V/24V, confirm the details with our team, and place your order. Because payment is cash on delivery, have the exact amount ready when the parcel arrives. Before you confirm, check the battery voltage, the battery type and the array’s open-circuit voltage against the listing, so the order matches the system you plan to build. If you are unsure, ask us first, because a quick question before ordering is simpler than a return later. Our team can answer questions by phone, on Facebook Messenger or by email, so you can take your time before you commit.

Delivery timing depends on where you live. Orders inside Dhaka city usually take 1–3 days, while orders outside Dhaka usually take 2–5 days.

Before you order, check that the controller matches your battery bank and PV array, as described in the compatibility section above. If something does not match, call us on 09638054751 before you go ahead.

Returns follow our Delivery & Returns policy, linked above. Read the full policy for the return terms, and contact us if your delivery needs attention.

Frequently asked questions

Is the SRNE Shiner 12V/24V suitable for both 12V and 24V systems?

Yes, according to the listing, it automatically recognises a 12V or 24V battery voltage. Check your battery bank voltage before connecting it, and follow the maker’s instructions.

Does it work with lithium batteries?

The listing states that the controller supports both lead-acid and lithium batteries. Set the battery type to match your chemistry and follow the battery maker’s charging guidance.

What is the maximum PV input voltage of the SRNE Shiner 12V/24V?

The listing says it can run with a PV max input voltage up to 60V (VOC). Check your array’s open-circuit voltage against that figure before you connect it.

Does the controller include Bluetooth?

Bluetooth is available through an external module, the BT-2, according to the listing. The listing does not state whether the module is supplied with the controller.

Can I monitor the SRNE Shiner 12V/24V from my phone?

According to the listing, a mobile app can show system status, battery voltage, charging current and PV input when used with the BT-2 module.

What protections does it offer?

The listing names overcharge, over-discharge, short-circuit and reverse polarity protection for the SRNE Shiner 12V/24V. It also describes temperature protection, over-voltage protection and current limitation.

Is the SRNE Shiner 12V/24V suitable for an RV or off-grid system?

The listing presents it for home, RV and off-grid solar systems. Match the controller to your panel and battery layout, and follow the maker’s instructions.

How long is the warranty?

The listed warranty on the SRNE Shiner 12V/24V is 1 Year seller warranty. Ask us if you need more detail before you order.

Can I pay cash on delivery and return it?

Yes, we deliver all over Bangladesh and you pay cash on delivery. You can return it within 7 days of delivery, as set out in our Delivery & Returns policy.

How do I ask about the SRNE Shiner 12V/24V before ordering?

Call 09638054751, message us on Facebook Messenger or email care@gadgetsuperb.com. We are happy to help with questions before you buy.

How long does delivery take?

Delivery usually takes 1–3 days inside Dhaka city and 2–5 days outside Dhaka. Timing for the SRNE Shiner 12V/24V follows the same store policy for every order.

Should I charge the battery before using the SRNE Shiner 12V/24V?

Yes, the general advice is to charge the battery fully before first use, then follow the maker’s instructions.