battery charging

What the better option to use on the BS30 in the field to charge batteries? The most I would need is to charge all 4 sets of batteries once in the field. A Generator or Power Station ? What make and model do you use? I've been looking at a EU2200 from Honda , and a Bluetti Portable Power...

Unsure if this is the right place please feel free to move. We have been trialing this for 2 weeks on various locations and have just placed our order. I have agreed with he UK distributor a 5% discount for anyone in the drone industry. the featured unit cost £1600 plus vat the prices and...