8 KW off-grid solar power system with Battery is very suitable for residential area .
Off grid means there is no access to utility grid, self-sufficient energy system, un-interrupted power supply .
PV SYSTEM DESIGN CRITERIA
– 8kW Standalone system, shipped to Majuro, Marshall Islands;
– All PV system components purchased must be under 10 year warranty and include the following:
peak capacity with international certification, rated at 600V when combined along a string and with allowable +/- 3% peak power calibration.
Must be installed on two different roof pitches to help spread the energy delivery over the day and year.
Must be installed on a roof with a 10 to 25 degree slope, so panels are not installed at less than a 10 degree angle.
Should include internal by-pass diodes in each panel with the number depending on the size of the module proposed.
Model No.: MUL-6M-320P-72
costs and maximizing the KWH output of your system per unit area
Tight positive power tolerance of 0W to +5W ensures you receive modules at or above nameplate power and contributes to minimizing module mismatch losses leading to improved system yield
Top ranking in the TUV rheinland energy yield test and the PHOTON test demonstrates high performance and annual energy production
Tests by independent laboratories prove that Solar modules:
Successfully endure ammonia and slat-mist exposure at the highest severity level.ensuring their performance in adverse conditions Junction box and bypass diodes guarantee the modules free of overheating and Hot spot effect
ISO14001:2004 and BS OHSAS 18001:2007
• The Features of the solar cell Homogeneours acid or caustic soda Enhanced blu-ray spectral response
The Highest standards of the positive silver electrode Silver aluminum negative electrode
10-Year limited product warranty
Limited power warranty:10 years at 91.5% of the minimal rated power output 25 years at 81% of the minimal rated power output
In compliance with our warranty terms and conditions
- Electrical Performance
|Electrical Parameter of at stand test condtions(STC)|
|Power output tolerances(w)||0/5|
|Voltage at Pmax V||36.04V|
|Current at Pmax A||8.38A|
STC:1000W/m² irradiance.25℃ 200W/ m² according to EN60904-1
|Nominal operating cell temperature||45+-2℃|
|Max.system voltage||1000V DC|
|Max series fuse rating||15A|
|Limiting reverse current||15A|
|Operating temperature range||-40℃ to 85℃|
|Max static load.front(e.g snow and wind)||5400pa|
|Max.static load.back(e.g wind)||2400pa|
|Front cover(material/thickness)||Low-iron tempered glass/4.0mm|
|Cell(quantity/material/dimensions/number of busbars||72/polycrystalline silicon/156mm×156mm/2 or 3|
|Encapsulant(material)||Ethylene vinyl acetate(EVA)|
|Frame(material/color/anodizatin color/edge sealing||Anodizedaluminum alloy/silver/clear/silicone or tape|
|Junction box(protection degree)||≥ IP65|
|Cable(Length/cross-sectional area)||1200mm /4 mm²|
|Plug connector(type/protection degree)||MC4/IP67|
|30 pcs/carton 1 cartons/pallet|
The data do not refer to single module of contract and they are not part of the offer.they only serve for comparison to different module type
Gel type preferred, Sealed type acceptable. System DC voltage to be 48V
model and make with proven experience and use in the Marshall Islands.
Must be capable of inverting from panel generated DC to sync with the Majuro utility grid (i.e. frequency = 60Hz, voltage = 120V/220V USA style electricity);
Must include at least two MPPT inputs (one for each slope installed). A single inverter with two MPPT inputs is preferred but two separate inverters are acceptable.
Must be rated at least 80% of the rated wattage of the panel array.
Must include a passive protection system capability to prevent islanding in case of power outage, irregularities in the grid due to under/over voltage or under/over frequency of 60hZ, etc.) as well as an active protection system to prevent synchronization with other solar installations on the grid if there is a failure of grid power.
Must include AC isolator and solar array (DC) isolator and surge protection devices for lightning protection.
(4)Solar Mounting System:
Aluminium or Aluminium alloy with stainless steel fixings only. Galvanized metal mounting systems will not be acceptable.
Double insulated UV resistant solar wiring – cables able to stay in the sun all the time and sized to <3% voltage drop at full power from the solar array.
Must include grounding with all earth cables interconnected and leading to a common earthing system that is also the earthing system for the inverters and all other system components using at least 4 mm copper wire. No daisy chaining of module grounds allowed.
to consolidate the string wires into a single stream that go to the inverter inputs.
Each string must be capable of being isolated for individual testing using fuses or appropriate DC switches.
3-way pole switch (transfer switch) to be included to switch from solar power input to utility input in case solar system needs to be turned off for maintenance purposes.
(7)Solar output meter:
installed from the combined solar outputs to the building and block extra energy from the standalone solar grid so it does not go into the grid.
Preliminary effects for this 8KW solar power systems on metal roof as below :
General BOM for this 8KW solar power plant system as below :
|8KW Solar system|
|Product name||Goods Description||Quantity (pcs)|
|Solar panel||Model size: 1650*990*40 mm, 320W
PV input voltage: 144V
PV input current: 80-90A
|mounting bracket||Material: stainless steel and all the accessories||32|
|Combiner box||Type: 4strings input, 1string output with SPD, fuse, breaker||2|
|4KW Inverter||Power size: 4KW
48V 60A MPPT controller build in
|Battery||Model size: 12V 200Ah
Working time: 4.8hours/day
|PV cable||Red30M+Black 30M||4|
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