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Frequently Asked Questions
In this section we have tried to answer some of the questions you may have about our charge controllers and also about solar energy in general. If you need further information please contact us using the email link below.
Why do I need a solar charge controller?
The amount of electricity produced by a Photovoltaic (electric) solar panel depends on the amount of sunlight falling on the panel. During low sunlight periods the panels will only produce small amounts of electricity, in high sunlight situations a great deal of electricity can be produced. A flat battery can absorb a high current from a solar panel but a charged battery will be damaged by too much current. A charge controller will gradually reduce the current from the solar panel as the battery charges up.
Which controller will suit my 120 watt panel?
Depending on the manufacturer, a 120 watt panel will produce a maximum of 7.5 amps of electrical current in direct sunlight. So you should choose a controller that will handle at least 10% more than this. A 10 amp controller would be most suitable.
Which controller is best for my motorhome?
Our most popular controller for motorhomes is the SB1C. This handles solar panels up to 10 amps. If your solar panels produce more than 10 amps then we suggest you consider our SB2C which handles 15 amps.
Can I also charge my engine battery from the same solar panel?
If you wish to charge your engine battery as well as your domestic battery, then choose the DB1C controller for solar panels up to 10 amps. For larger solar systems our DB2C can handle solar panels up to 15 amps total.
I have more than one solar panel. How do I choose a controller?
If you intend to connect your solar panels together to make one large panel, then you simply add together the amps rating of each panel. For example, a 8 amp panel wired in parallel with a 5 amp panel will perform as a 13 amp panel. Choose a controller that can handle at least 10% more than this total, I.e a 15 amp controller.
Can I use a SunWorks charge controller on my boat?
Our controllers have been use on all types of boat and yachts including transatlantic rowing boats! As with all electronic equipment, the controller must be sited inside the boat, where it will give many years of reliable operation.
Is it easy to install a SunWorks controller?
SunWorks charge controllers are straightforward to install by the average DIYer. Essentially there are two wires for the battery and two for the solar panel. Details of wire type and fuses to be used are included in the comprehensive instructions.
Is it easy to use a SunWorks charge controller?
All our controllers are fully automatic and need no user operation.
How does a charge controller work?
A SunWorks charge controller will control the electrical current from your solar panels to your batteries. Maximum current will be applied until the battery approaches full charge. The current is then reduced to safe levels. The battery charge is constantly monitored and the appropriate electrical current is applied to the battery. Battery life will be maximised and the performance of your solar panel system will be enhanced.