Most reacted posts

Longi is highly recommended as they have been consistently ranked tier 1 in bloombergNEF list. I worked in a solar developer firm, and we only use module from tier 1 ranked manufacturer because of their quality, after services and price. We always rotate between Longi, Jinko, JASolar...

I'm doing commercial, industrial and large-scale solar project right now. The module price can go as low as USD$0.084/Wp from Tier 1 brand including shipping and logistic cost if you order 1000kWp or more. 610Wp 66-cell N type Top con half cut bifacial module only cost USD$52.

Calculated for you based on the link provided by zanydroid. For portrait, it is 344.4mm+-50mm from the edge (short side) to the rails. For landscape, 100~240mm from edge (long side) to the rails.

Can you post your PV module specs?

A = length of module at long side, +- 50mm is the allowance. For JKM425N-54HL4-B, A = 1722mm For iron ridge rail system, you will need to use clamp installation. "Clamp installation on long side ..." is for portrait installation.

P = IV You need voltage and current to generate power. In solar PV modules: Current is proportional to the amount of sunlight that the panel receive. Voltage is always there regardless if there are any load or sunlight. At night, panel will still produce voltage but current is 0 because there...

Many Tier 1 module manufacturer like Astroenergy, CanadianSolar and Seraphim Solar produces the same exact specification. What I recommend is to compare: 1) $/Wp 2) Highest power bin that they can offer to you based on your ETD 3) After sales services

Fuse protects your equipment from over current, won't protect from over voltage.

Not really a design flaw but more of a design decision due to market demand. Solar modules are meant to be installed in a shade free environment. It is technically possible to incorporate string level bypass diode into the module, but it would mean higher manufacturing complexity and higher...

SUN2000-12KTL-M2 does not have any connection port for the battery to be connected directly to the inverter. Also the inverter does not have any built-in communication features to talk to the battery. Your battery setup will need to be AC coupled to your common power distribution board meaning...

Huawei inverter have such issue where I encounter frequent AFCI fault. Spoke to Huawei technical team and they mentioned that the Arc fault detection threshold was too sensitive so they made some changes to the setting and asked us to update the inverter firmware. Everything was good after the...

It will still work BUT The inverter manufacturer that I've spoke to DO NOT recommend sizing over the value indicated in the datasheet as they claim that it will reduce the lifespan of the inverter. This will also give a very good reason for manufacturer to void the warranty as you are not...

Ideal case is to have the affected string connect to its own MPPT. From IV curve, low irradiance will cause the voltage to reduce marginally. Minor impact but it is a big NO NO if you are designing for large scale solar project as this will add up to significant $$$ losses over time.

Why not go for N type Topcon module? With the same dimension, their power bin is between 575~590Wp, better LID, linear degradation and temperature coefficient.

Suggest to clarify with the manufacturer on what is the maximum short circuit DC current rating for the inverter. Typically, the inverter will indicate the maximum input DC current and maximum short circuit DC current in their datasheet. Maximum input DC current is calculated using panel's...

Any fault code? How hot is your inverter when that happen? Any graph to show?

The bypass diode only works within module level. You need an external bypass diode such as power optimizer for string level bypass. I've tested the voltage between a fully shaded and panel @ 1000W/m2 irradiance, the difference is about ~15%. The problem is the current which is proportional to...

Take note that Huawei optimizer has this design limitation, you can only use 1 string per MPPT if you have optimizer installed. This means that for SUN2000-12KTL-M2 (2 MPPT, 2 input per MPPT), you can't connect anymore strings based on your existing setup. But you can connect up to 10kW worth...