I’ve been evaluating a fully integrated off grid electrical system from the manufacturer EG4. The system includes a 6 kW inverter, 14.4 kWh lithium battery and a 10 kW MPPT charge controller. All necessary breakers and connection points are built into the case. The price point is what got my attention and made me curious to install and test the system. The entire system has a MSRP of less than $8,000. Here’s what I learned.

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First the good parts:

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1. Simple and fast to install and commission. In less than an hour the system was installed, fully operational, and connected to the web.

2. It has two MPPT inputs with a voltage range of 150 to 400 Vdc.

3. Automatic generator start is included and easily programmed via the software.

4.120/240 Vac output capable of supporting 6 kW of load (the rated amount).

5. Easy to expand system with more battery capacity and or inverters.

6. All components (inverter and battery) have the appropriate agency listings for the equipment.

7. Not being familiar with the brand, I asked a few installer friends in the US who told me that the product is “OK”. (Not super fancy but good value for the price.)

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Now the not so good parts:

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1. Fairly high no load drain (phantom draw). This is consistent with other inverters that have the same high frequency topology.

2. It’s heavy.  The battery weighs over 120 kg. The inverter and conduit box are much lighter and more manageable.

3. Some of the web and local app interface has difficult to understand language. While not a ”showstopper”, it is something to be aware of.

4. Does not run unbalanced loads very well. I managed to make it shut down when there was more than 3000 Watts on one leg of the inverter. Some care in balancing large loads in the breaker panel is recommended.

5. Fan runs frequently, sometimes for apparently for no reason.

   

My conclusion is that this system would serve most Lasqueti homes well. The phantom loads will require a bit more generator charging during the winter. This may be outweighed by the attractive price point. There are very few systems that are this well thought out in this price range. The system is operating at our house. Call me if you want to see it or learn more. - Ezra Auerbach