I currently have a modified sine wave mecer 24v unit with two 105ah Royal batteries. It has been working well. I also added a 75/15 Victron MPPT and 405w solar panel and this keeps the batteries fairly charged during LS. However, I want to upgrade to a PSW system with the same batteries and solar setup mostly as I do have some concerns regarding the long term use of MSW. My load so far is about 350-400w. Bearing in mind my current setup, I would appreciate any advice on what would be a good upgrade. I am considering the Victron multiplus 24/500/10/16 or the 800 version as I may want to increase the load a bit. 

What would you guys recommend? Also will the PSW work much more efficiently than the MSW so for example although the power specs of the Mecer is 1440w will a Victron PSW inverter at say 800w or 500w be pretty close or comparable to the Mecer. Appreciate feedback

On 2020/08/25 at 4:40 PM, Doc1572 said:

I would appreciate any advice on what would be a good upgrade.

Personal opinion..don't upgrade just to upgrade. When you know what the actual limitations are of your system for what you do with it...then upgrade.

From previous threads, the general consensus appears to be that MSW vs PSW is not all that important (except for some motors where PSW is prefered) but most electronics should be okay with MSW.

On 2020/08/25 at 4:40 PM, Doc1572 said:

I am considering the Victron multiplus 24/500/10/16 or the 800 version as I may want to increase the load a bit. 

Also will the PSW work much more efficiently than the MSW so for example although the power specs of the Mecer is 1440w will a Victron PSW inverter at say 800w or 500w be pretty close or comparable to the Mecer. Appreciate feedback

The efficiency will likely not have too much to do with PSW>MSW but the overall design and topology. Considering claimed numbers are often exaggerated it looks like the Mecers generally claim about 82-85% efficiency, and the Victrons about 92%. No idea what the Mecer's own consumption is but multiplus spec sheet claims 7W for the 24/800.

If you need a 1000W you need 1000W not 800W (again personal preference but I try to stay away from the maximum side of capability as much as possible...i.e. I prefer to over spec a bit).

Keep in mind if you want to increase your load then battery capacity is also going to become an issue...

27 minutes ago, introverter said:

From previous threads, the general consensus appears to be that MSW vs PSW is not all that important (except for some motors where PSW is prefered) but most electronics should be okay with MSW.

Indeed. LED lamps, CFL lamps, old incandescent lamps, anything with a heating element (kettle, etc), anything with a switch mode power supply (laptops, computers, modern LCD televisions, DSTV set top boxes), none of those things care about the shape of the sine wave.

Things that care: Microwave oven, anything with a small induction motor, eg Fridge, Freezer, hair dryer, cooling fans.