最近在考虑安装太阳能板，某公司的客服给推荐了Risen 18x 370w 6.66kw加Growatt 5kw inverter的系统，一共是$2800(包含48个月免息贷款，单项逆变器，两层楼），一开始谈的好好的拿了quote去向维州政府网站递交申请，申请批下来后正巧就封城了，三天没联系上该客服。
随后联系了该公司另一个销售，非常熟悉知道我是谁，并说我的系统安装有些调整，因为电工看了后说我家的瓦顶部分位置不能安装太阳能板（该位置的瓦片为flat concrete tile），需要把那边的板转移到另一个位置，效能减低了不说，还需要支付额外的安装费用$600，说该费用是由电工报价的。
我在网上查了flat concrete tile是可以安装太阳能板的，可能需要一些适合的支架来固定。不太清楚这个销售为什么说不能装，所以想请各位懂行的足友解惑一下。
问题二：
另外想请教一下：家里是三相电的电表，该公司客服说逆变器厂家跟他们科普了一下，单项逆变器和三相逆变器对三相电的家庭是等效的，不需要选择三相电逆变器。但是销售却说可以选三相逆变器，也可以选单项逆变器，三相逆变器有三个接口，可以分别接入家里的三组电路，三组电路平均分配太阳能发的电。所以不知道有没有必要多加$650选三相逆变器？
评论
回答你第二个问题
HOW DOES A SINGLE PHASE INVERTER ON A 3 PHASE SUPPLY AFFECT MY SELF CONSUMPTION?
We often get asked if using one single phase inverter on a three phase supply will affect your financial returns from solar.
The short answers is: No it won't.
The longer answer is:
People on 3 phase supplies considering using a single phase inverter worry that any electricity they use on the 2 phases that are not connected to solar will all be imported at their consumption rate (typically 30c per kWh) no matter how much solar they are generating on the solar phase. If this were to happen their self consumption ratio would reduce and their financial returns would reduce too.
This does not happen. All 3 phase meters must take into account the sum of all the electricity being used on all the phases and then subtract that from the
amount of solar energy being generated to calculate the import or export amount for billing.
i.e. they don’t penalise you financially for having a single phase inverter on a 3 phase supply.
For example - If you are exporting 5kW of solar on the blue phase, whilst importing 1kW on the red phase and 2kW on the white phase, the meter will credit you for exporting at a rate of 2kW, because:
5 kW exported - 2 kW imported - 1 kW imported = 2 kW exported.
评论
回答你第一个问题：
1. flat concrete tile 有些（是有些）太薄，一踩就碎，你这个可能是这个情况，电工不会骗你的。
2. 如果换到别的屋顶（我猜是铁皮的，让你加架子Tilt 所以才多收钱），我猜的，没看见具体情况不敢说。
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