Kool Energy Mobile Inverter Trolley

[BenS]

Hi,

 

I am looking for a trolley type solution I can move when needed. Need to provide power during load shedding to office equipment (laptop, router, monitor, light etc - max 300W).

 

Anyone have experience with this brand (Kool Energy)?

 

https://www.solar-europe.co.za/product/kool-energy-mobile-inverter-trolley-2kw-200ah-24v-kool-mit-2kw/

 

https://www.solar-europe.co.za/wp-content/uploads/2021/09/Kool-Energy-1KW-2KW-Mobile-Inverter-Trolley-Brochure.pdf

 

Any advice or recommendations will be appreciated.

 

Thanks.

 

[Arandoza]

Just some thoughts..

When would you want to carry the load? time of day or night? and for how long?

If during the day, it seems this unit could take for 4 or 5 x +/-300w -330w panels in series with suitable specs as a solar input, so batteries would not be heavily utilised? but best solar production is from around 9am-3pm before and after these times its good in summer, but not winter.

If you are hoping to use it at night depnding on load and duration and how often, the batteries will degrade and one should expect to replace them after about 18-24 months?? maybe a bit more if lightly used.

The unit is only rated as max 2000w out and 1600watts max input from solar, so if probably not intended to carry more thatn about 50% of load for long durations?

For the Price, If maybe a better bet to buy a 24v 3kva axpert or similar inverter/charger/mppt unit and add your own batteries, maybe lithim - pylontech 24v pack, as this would have better longevity on the batteries? but check max solar pv input of inverter and one may also be able to add further battery packs later? if you want to assemble your own.

Based on the battery spec 2 x 200ah 12v = 200ah at 24v at 50% depth of discharge exclduing loses in cables and dc-ac etc this would mean a max of 2400watts could be usable,depnding on the load?  But a 50% dod will kill the batterys really fast. Probably if we take it at 25% 1200watts are usable with a lite load, if running purely from battery. Remember the peukerts law effect, high load very short run time, very light load much longer run time - https://batteryguy.com/kb/knowledge-base/peukerts-law-how-long-an-amp-hour-battery-will-last-under-a-given-load/ 

 

Last thought is is the unit like a ONLINE UPS? so it simply charges the batterys continously when powered by mains, and there are no brownouts or dips in power being supplied? or more like a switching UPS? where it take a few ms maybe up to 10ms to switch from mains to battery? I didnt notice this in the specs? The axpert type inverters take up to 20ms to switch from mains to battery?

 

Good luck

[BenS]

@Arandoza: Thanks so much for the advice.