I am running an off -grid camper and using only one 300 watt Sharp monocrystalline solar panel with Victron Mppt Charge Controller. I have all the power I need, the system works well. I don’t need microwaves, coffee-makers and hairdryers, anything that is power consumption heavy is avoided. I do need TV, internet, a compressor fridge etc. I also have a Victron 800 watt inverter which is lower than most people would select. Inverters can consume power on standby so the lower the watts the lower the consumption, don’t get something you don’t need. The Victron uses a standby setting, in other words you can leave it switched on permanently with very little power wastage (U.K. is 240 volts). In truth I hardly use the inverter, it’s only there in case I need it. Because many vehicles are fitted with Smart Alternators I can take full advantage of this by fitting a 60 amp battery to battery charger. The rest of the vehicle is diesel powered, cooking is diesel as well as heating and hot water. To be honest with lockdown (COVID) I haven’t been able to use the vehicle as often as I would have liked yet the last time I went on hook-up was a few months ago and that was to charge the engine battery. Even with poor U.K. sunlight hours, the solar and engine (60amp max) have kept me going.
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