Posted as news not a recommendation but Bluetti look like they are updating their alternator charger system:
The BLUETTI Charger 2 delivers up to 1200W dual-input charging (800W alternator + 600W solar). Smart PV-priority design for RVs, vans, and off-grid power.
bluettipower.co.uk
Things that catch my eye are:
- Solar input as well as alternator
- Trickle reverse charge
- High wattage DC option to charge non Bluetti systems
- £99 upgrade from Charger 1
Personally I'd still prefer a fitted system but it's interesting to see the options around power packs evolve, more options are always good.
In particular the high current DC output addresses one of my concerns that fitting these type of systems locks you into one brand.