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Model:
MPPT12-2P
400W Solar Charger
Maximum Power Point Tracker
Operating Instructions
Please read these instructions before use
Unit 2, 110 Station Road, Seven Hills ,NSW, 2147, Australia
MPPT FAQs
Q: What is an MPPT?
MPPT stands for Maximum Power Point Tracker and is a specialised converter designed to maintain the PV voltage at the level in which it
delivers maximum power to the load or battery. The nominal panel output power can only be ensured with the use of an MPPT.
Q: What are the GSL MPPTs advantages compared to standard solar regulators?
1. Suitable for new lower cost high efficiency grid type panels since the GSL MPPT can efficiently charge the batteries from relatively high
voltage, say 12V batteries from 36V MPP panels.
2. Less interference and more accurate voltages during absorption and float.
Q: What output can I expect from a 200W or 400W MPPT?
1.
The maximum bulk charge current with a 12V battery and 200W panel is approximately 14A, so you can expect about 60AH per day which
is a 60W load for about 10 hours.
2.
The maximum bulk charge current with a 24V battery and a 400W panel is about 14A so you can expect about 60AH which is a 60W load
for about 20 hours.
Q: Why are MPPT used mainly in high power systems?
Until now and despite their overwhelming advantages MPPTs have been excluded from low power systems because of cost. The new GSL
MPPT specifically designed for low power makes economic sense even in small systems.
Q: What sort of batteries should I use?
1.
A deep cycle battery is a must due to the cyclical nature of solar systems with a recommended battery capacity of at least 60AH.
2.
A larger battery will not only give longer run time during low light but also will be able to avoid available PV power being unstored such as
when the battery reaches the float stage.
Q: How does PV temperatures affects charge current?
Temperature increase brings down the PVs maximum power point voltage reducing the MPPTs current gain available. In principle at 25C it is
possible to achieve 30% gain but at 40C (A more realistic average temperature) about 20% is still available.
Q: What happens at low PV currents?
The MPPT will outperform the conventional regulator above 4% of nominal panel power. Below 4%, 6W in a 200W panel, the MPPT will have
a slightly lower output current than a non MPPT.
MPPT12-2P R7
Q: Is interference possible? and If so what do I do?
GSL’s MPPTs produce far less interference than conventional solar regulator during the absorption and float stages, that
is during most of its operating time, and its designed to comply with local and international EMI standards however some
interference is still possible. If interference occurs first try and reorient the aerial or move the sensitive equipment away from the
MPPT wires. Ensure the MPPT chassis is grounded. Grounding a battery terminal may also help and finally you can try adding
ferrite clamps.
Warranty Conditions:
Our products come with guarantees that cannot be excluded under the Australian Consumer Law.
The customer is entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage.
The customer is also entitled to have the products repaired or replaced if the products fail to be of acceptable quality and the failure does not amount to a major failure.
GSL Electronics (GSL) warrants that its products will, under normal use and service, be free of defects in material and workmanship for a period of two (2) years from
the date of the original purchase by the customer as marked on the customer’s original invoice.
Please refer to our website for full warranty and return information which can be found at http://www.gsl.com.au/faq.html
