Product overview:

The UK solar power specialist Photonic Universe Ltd is proud to offer this brand new premium quality 40W 12V dual battery solar charging kit which includes a 40W monocrystalline solar panel, a 10A dual battery solar charge controller for independent charging of two batteries or battery banks, mounting brackets, a waterproof cable gland and cables with connectors.
   Our promise:
  • No-quibble 30 days return period
  • UK repair or replacement warranty
  • Free lifetime technical product support
  • Deep industry expertise and knowledge
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This 40W dual battery solar kit includes:

  • High efficiency 40W monocrystalline solar panel with 5m of special solar cable and waterproof connectors
  • 10A 12V dual battery solar charge controller for independent charging of 2 batteries or battery banks (can work with a single battery too)
  • Set of 4 corner plastic brackets for bonding to the roof
  • Waterproof double entry cable gland
  • 5m of double core battery cable
  • Pair of waterproof MC4 connectors for easy connectivity
  • User manual with detailed installation instructions



The high efficiency waterproof 40W monocrystalline solar panel included in this kit is perfect for permanent outdoor use to provide free electricity for charging a 12V battery to power various devices for many applications such as in a camper van, boat, shed or farm. The panel is fitted with 5m of special solar cable which can work at high roof temperatures, with minimum power losses. A pair of male / female MC4 connectors are crimped on the end of cable for easy connection to other solar panels, extension leads or to your existing system (the MC4 connectors can also be cut off when wiring to the screw terminals of a solar charge controller).

This panel also features innovative 5 busbar solar cells, which are more efficient than the 2, 3 or 4 busbar solar cells used in most other solar panels, and are able to extract more power from the same surface area. This results in a smaller overall solar panel, which is ideal for applications where space is limited. These solar cells are also the best choice for applications in warmer climates, as they operate well even in high ambient temperatures.

Solar panel specifications:

  • Peak power: 40W
  • Maximum power voltage: 20.2V
  • Maximum power current: 1.98A
  • Open circuit voltage: 23.9V
  • Short circuit current: 2.10A
  • Power allowance range: +/- 3%
  • Dimensions: 705 x 345 x 25mm
  • Weight: 3.5 kg
  • 4 mounting holes 9 x 11 mm
  • 2 x 5m of high quality single core solar cable 2.5mm cross section
  • Male and female MC4 connectors attached
The following 10A 12V/24V dual battery solar charge controller* is included with this kit:
*Please note that due to our warehouse arrangements, this item may be shipped from a different warehouse and therefore delivered in a separate package.
Photonic Universe dual battery solar charge controller

This 10A 12V/24V dual battery solar charge controller is designed to charge and protect 2 batteries simultaneously, with automatic cut off to prevent over-charging. The controller uses PWM (Pulse Width Modulation) technology which increases charge acceptance and prolongs the life of your batteries. PWM technology can also recover some lost battery capacity.

This is a perfect solar controller for a caravan / camper van / boat or another system with 2 batteries (e.g. engine and leisure battery) or 2 battery banks. You can set initial charging priority e.g. 80% engine battery and 20% leisure battery. When one of the batteries is fully charged the controller will automatically divert all current to the other battery.

Can the unit work with only 1 battery? Yes, absolutely! The controller will determine automatically if there's only 1 battery connected and will pass 100% of charging current to this battery. You can add a second battery later.

The unit has many protection functions, such as stopping reverse current at night (from the battery back to the solar panel), over charge, short circuit, reverse polarity etc. Other features include various LED indicators, battery type selection (sealed, gel, flooded) and an RJ-45 socket for an optional remote LCD meter with 10m cable.

A built-in temperature sensor allows the controller to optimise the charging process depending on the ambient temperature. If you are planning to position the controller far away from the battery, or if the battery and the controller are exposed to different ambient temperatures, an external remote temperature sensor with 3m cable is recommended for this dual battery solar charge controller. To enable connection to the screw terminals of the controller, the green connector block on the end of the remote temperature sensor cable should be cut off.

Charge controller specifications:

  • Fully automated operation and auto 12/24V selection
  • 3 pairs of terminals (input, battery 1, battery 2)
  • LEDs to indicate state of charge
  • Temperature sensor for temperature compensation of charging (-30mV/C/12V)
  • Additional connection point for a remote temperature sensor (not included)
  • RJ-45 connection point for a remote LCD meter (not included)
  • Various protection features (over charge, discharge, short circuit, over load, battery reverse polarity etc)
  • Self-consumption: 4mA at night, 10mA when charging
  • Working temperature: -35C to +55C
  • Terminals for wire up to 4.0mm2
  • Size: 15.5 x 7.6 x 4.0 cm
  • Weight: 185 g
  • Multiple mounting holes for ease of installation

Other components of the solar kit

This kit includes a set of 4 plastic corner mounting brackets for fixing solar panel to the roof. The brackets can be bonded to the roof using an appropriate sealant (not included). A waterproof double entry cable gland included with the kit is perfect for getting cables from outside to inside and keeping the place fully waterproof. The kit also includes 5m double core battery cable. The full length of cable can be used for 1 battery, or it can also be cut into 2 pieces (e.g. into 2m and 3m) for use in dual battery systems. If more cable is required, you can purchase additional 5m double core battery cable.

Corner brackets specifications:

  •     Material: plastic
  •     Colour: white
  •     Size (1 bracket): 15x15x6.5cm
  •     Weight: (4 brackets): 1.6kg

This kit is supplied with a detailed user manual which explains wiring and operations.

If your system requires a premium quality, long-life battery, we recommend our AGM or GEL deep-cycle batteries for your application.

Connection scheme

It's very easy to wire this kit up: simply connect the first battery to the "Battery 1" terminals of the solar charge controller (battery "+" to "+" Battery 1 terminal of the solar controller, battery "-" to "-" Battery 1 terminal of the solar controller), then connect the second battery to the "Battery 2" terminals of the solar controller (skip this step if you only have one battery), and finally connect the solar panel to the solar terminals of the controller (solar panel "+" to "+" solar terminal, solar panel "-" to "-" solar terminal) . Now the kit is ready and will start charging immediately! Disconnection should follow the reverse order.

The connection diagram for this solar kit is provided below:

Connection diagram for 40W 12V Photonic Universe dual battery solar charging kit

If you have any questions about this product or you need our free advice please contact us via eBay messaging (tick the box "This is not about an item" if you don't know this item number).

Payment:

  • We accept Pay Pal, cheques, credit and debit cards, and bank transfer payments. If you choose a cheque payment, please note it might take up to 2-3 weeks to get processed and cleared. Other payment methods are normally much faster, and they should be used for urgent orders. Buy it now listings will require an immediate payment via eBay.

Delivery:

  • Please note that import duties, taxes, and charges are not included in the item price or shipping cost. If the courier requires payment of these local charges to complete the delivery, they will be your responsibility as a buyer.
  • Upon receipt of the item, please examine it carefully. In the unlikely event of any damage in transit, please report it to us immediately by email or phone, but in any case no later than 7 days after receipt of the item. To enable us to deal with the courier efficiently, we may ask for some additional details, e.g. photographs of the damage and packaging.

Returns:

  • If you change your mind within the first 30 days of receipt of the item, we will be happy to accept it back and refund your payment. You will need to notify us via email / phone within 30 days of receipt that you intend to return the item, request the return address and send the item back within a further 14 days at your cost. To be eligible for a full refund, the item must be new, unused, undamaged and correctly packaged. Please ensure that we receive the item in its brand new, original condition, i.e. take reasonable care to wrap and protect it on the way back to us.

Warranty:

  • These products are covered by a 1 year warranty. Solar cells are guaranteed to produce at least 90% of nominal power in 10 years and 80% of nominal power in 25 years.

About us

Photonic Universe Ltd is a company based in London, United Kingdom. We design and supply solar and wind renewable energy products and complete off-grid power systems for various applications, to both trade and retail customers. Tens of thousands of clients all over the world rely on our products to generate clean energy for their households, vehicles, boats and remote places with no access to mains electricity.

We strongly believe that solar and wind energy can provide significant benefits and we are doing our best to allow you to buy these quality solar products at fair prices. We've had a lot of positive feedback from our customers who have been impressed by the high quality of our products and excellent service.

We are VAT registered in the UK and can provide VAT receipts upon request. Photonic Universe is a registered trademark in the UK.